35 files changed, 0 insertions, 8710 deletions
diff --git a/framework/Db/ActiveRecord/Relations/DEPRECATED_COMPATIBILITY_REASONS_ONLY b/framework/Db/ActiveRecord/Relations/DEPRECATED_COMPATIBILITY_REASONS_ONLY
deleted file mode 100644
index 8c7a4073..00000000
--- a/framework/Db/ActiveRecord/Relations/DEPRECATED_COMPATIBILITY_REASONS_ONLY
+++ /dev/null
@@ -1,3 +0,0 @@
-Please note that this file is used for old Prado ActiveRecord applications which use $record->withAnotherRecord - syntax.
-
-You shouln't use that syntax anymore as it's deprecated in this portation of Yii ActiveRecords.
diff --git a/framework/Db/ActiveRecord/Relations/TActiveRecordRelationContext.php b/framework/Db/ActiveRecord/Relations/TActiveRecordRelationContext.php
deleted file mode 100644
index 696bb5b1..00000000
--- a/framework/Db/ActiveRecord/Relations/TActiveRecordRelationContext.php
+++ /dev/null
@@ -1,230 +0,0 @@
-<?php
-/**
- * TActiveRecordRelationContext class.
- *
- * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
- * @link http://www.pradosoft.com/
- * @copyright Copyright &copy; 2005-2008 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Data.ActiveRecord.Relations
- */
-
-/**
- * TActiveRecordRelationContext holds information regarding record relationships
- * such as record relation property name, query criteria and foreign object record
- * class names.
- *
- * This class is use internally by passing a context to the TActiveRecordRelation
- * constructor.
- *
- * @author Wei Zhuo <weizho[at]gmail[dot]com>
- * @version $Id$
- * @package System.Data.ActiveRecord.Relations
- * @since 3.1
- */
-class TActiveRecordRelationContext
-{
-	private $_property;
-	private $_record;
-	private $_relation; //data from an entry of TActiveRecord::$RELATION
-	private $_fkeys;
-
-	public function __construct($record, $property=null, $relation=null)
-	{
-		$this->_record=$record;
-		$this->_property=$property;
-		$this->_relation=$relation;
-	}
-
-	/**
-	 * @return boolean true if the relation is defined in TActiveRecord::$RELATIONS
-	 * @since 3.1.2
-	 */
-	public function hasRecordRelation()
-	{
-		return $this->_relation!==null;
-	}
-
-	public function getPropertyValue()
-	{
-		$obj = $this->getSourceRecord();
-		return $obj->getColumnValue($this->getProperty());
-	}
-
-	/**
-	 * @return string name of the record property that the relationship results will be assigned to.
-	 */
-	public function getProperty()
-	{
-		return $this->_property;
-	}
-
-	/**
-	 * @return TActiveRecord the active record instance that queried for its related records.
-	 */
-	public function getSourceRecord()
-	{
-		return $this->_record;
-	}
-
-	/**
-	 * @return array foreign key of this relations, the keys is dependent on the
-	 * relationship type.
-	 * @since 3.1.2
-	 */
-	public function getRelationForeignKeys()
-	{
-		if($this->_fkeys===null)
-			$this->_fkeys=$this->getRelationHandler()->getRelationForeignKeys();
-		return $this->_fkeys;
-	}
-
-	/**
-	 * @return string HAS_MANY, HAS_ONE, or BELONGS_TO
-	 */
-	public function getRelationType()
-	{
-		return $this->_relation[0];
-	}
-
-	/**
-	 * @return string foreign record class name.
-	 */
-	public function getForeignRecordClass()
-	{
-		return $this->_relation[1];
-	}
-
-	/**
-	 * @return string foreign key field names, comma delimited.
-	 * @since 3.1.2
-	 */
-	public function getFkField()
-	{
-		return $this->_relation[2];
-	}
-
-	/**
-	 * @return string the query condition for the relation as specified in RELATIONS
-	 * @since 3.1.2
-	 */
-	public function getCondition()
-	{
-		return isset($this->_relation[3])?$this->_relation[3]:null;
-	}
-
-	/**
-	 * @return array the query parameters for the relation as specified in RELATIONS
-	 * @since 3.1.2
-	 */
-	public function getParameters()
-	{
-		return isset($this->_relation[4])?$this->_relation[4]:array();
-	}
-
-	/**
-	 * @return boolean true if the 3rd element of an TActiveRecord::$RELATION entry is set.
-	 * @since 3.1.2
-	 */
-	public function hasFkField()
-	{
-		$notManyToMany = $this->getRelationType() !== TActiveRecord::MANY_TO_MANY;
-		return $notManyToMany && isset($this->_relation[2]) && !empty($this->_relation[2]);
-	}
-
-	/**
-	 * @return string the M-N relationship association table name.
-	 */
-	public function getAssociationTable()
-	{
-		return $this->_relation[2];
-	}
-
-	/**
-	 * @return boolean true if the relationship is HAS_MANY and requires an association table.
-	 */
-	public function hasAssociationTable()
-	{
-		$isManyToMany = $this->getRelationType() === TActiveRecord::MANY_TO_MANY;
-		return $isManyToMany && isset($this->_relation[2]) && !empty($this->_relation[2]);
-	}
-
-	/**
-	 * @return TActiveRecord corresponding relationship foreign object finder instance.
-	 */
-	public function getForeignRecordFinder()
-	{
-		return TActiveRecord::finder($this->getForeignRecordClass());
-	}
-
-	/**
-	 * Creates and return the TActiveRecordRelation handler for specific relationships.
-	 * An instance of TActiveRecordHasOne, TActiveRecordBelongsTo, TActiveRecordHasMany,
-	 * or TActiveRecordHasManyAssocation will be returned.
-	 * @param TActiveRecordCriteria search criteria
-	 * @return TActiveRecordRelation record relationship handler instnace.
-	 * @throws TActiveRecordException if property is not defined or missing.
-	 */
-	public function getRelationHandler($criteria=null)
-	{
-		if(!$this->hasRecordRelation())
-		{
-			throw new TActiveRecordException('ar_undefined_relation_prop',
-				$this->_property, get_class($this->_record), 'RELATIONS');
-		}
-		if($criteria===null)
-			$criteria = new TActiveRecordCriteria($this->getCondition(), $this->getParameters());
-		switch($this->getRelationType())
-		{
-			case TActiveRecord::HAS_MANY:
-				Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordHasMany');
-				return new TActiveRecordHasMany($this, $criteria);
-			case TActiveRecord::MANY_TO_MANY:
-				Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordHasManyAssociation');
-				return new TActiveRecordHasManyAssociation($this, $criteria);
-			case TActiveRecord::HAS_ONE:
-				Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordHasOne');
-				return new TActiveRecordHasOne($this, $criteria);
-			case TActiveRecord::BELONGS_TO:
-				Prado::using('System.Data.ActiveRecord.Relations.TActiveRecordBelongsTo');
-				return new TActiveRecordBelongsTo($this, $criteria);
-			default:
-				throw new TActiveRecordException('ar_invalid_relationship');
-		}
-	}
-
-	/**
-	 * @return TActiveRecordRelationCommand
-	 */
-	public function updateAssociatedRecords($updateBelongsTo=false)
-	{
-		$success=true;
-		foreach($this->_record->getRecordRelations() as $data)
-		{
-			list($property, $relation) = $data;
-			$belongsTo = $relation[0]==TActiveRecord::BELONGS_TO;
-			if(($updateBelongsTo && $belongsTo) || (!$updateBelongsTo && !$belongsTo))
-			{
-				$obj = $this->getSourceRecord();
-				if(!$this->isEmptyFkObject($obj->getColumnValue($property)))
-				{
-					$context = new TActiveRecordRelationContext($this->getSourceRecord(),$property,$relation);
-					$success = $context->getRelationHandler()->updateAssociatedRecords() && $success;
-				}
-			}
-		}
-		return $success;
-	}
-
-	protected function isEmptyFkObject($obj)
-	{
-		if(is_object($obj))
-			return $obj instanceof TList ? $obj->count() === 0 : false;
-		else if(is_array($obj))
-			return count($obj)===0;
-		else
-			return empty($obj);
-	}
-}
-
diff --git a/framework/Db/ActiveRecord/TActiveFinder.php b/framework/Db/ActiveRecord/TActiveFinder.php
deleted file mode 100644
index d55074c0..00000000
--- a/framework/Db/ActiveRecord/TActiveFinder.php
+++ /dev/null
@@ -1,1279 +0,0 @@
-<?php
-/**
- * CActiveRecord class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/CBaseActiveRelation*/
-
-/**
- * CActiveFinder implements eager loading and lazy loading of related active records.
- *
- * When used in eager loading, this class provides the same set of find methods as
- * {@link CActiveRecord}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TActiveFinder extends TComponent
-{
-	/**
-	 * @var boolean join all tables all at once. Defaults to false.
-	 * This property is internally used.
-	 * @since 1.0.2
-	 */
-	public $joinAll=false;
-	/**
-	 * @var boolean whether the base model has limit or offset.
-	 * This property is internally used.
-	 * @since 1.0.2
-	 */
-	public $baseLimited=false;
-
-	private $_joinCount=0;
-	private $_joinTree;
-	private $_builder;
-	private $_criteria;  // the criteria generated via named scope
-
-	/**
-	 * Constructor.
-	 * A join tree is built up based on the declared relationships between active record classes.
-	 * @param CActiveRecord the model that initiates the active finding process
-	 * @param mixed the relation names to be actively looked for
-	 * @param CDbCriteria the criteria associated with the named scopes (since version 1.0.5)
-	 */
-	public function __construct($model,$with,$criteria=null)
-	{
-		$this->_criteria=$criteria;
-		$this->_builder=$model->getCommandBuilder();
-		$this->_joinTree=new TJoinElement($this,$model);
-		$this->buildJoinTree($this->_joinTree,$with);
-	}
-
-	/**
-	 * Uses the most aggressive join approach.
-	 * By calling this method, even if there is LIMIT/OFFSET option set for
-	 * the primary table query, we will still use a single SQL statement.
-	 * By default (without calling this method), the primary table will be queried
-	 * by itself so that LIMIT/OFFSET can be correctly applied.
-	 * @return CActiveFinder the finder object
-	 * @since 1.0.2
-	 */
-	public function together()
-	{
-		$this->joinAll=true;
-		return $this;
-	}
-
-	private function query($criteria,$all=false)
-	{
-		if($this->_criteria!==null)
-		{
-			$this->_criteria->mergeWith($criteria);
-			$criteria=$this->_criteria;
-		}
-
-		$this->_joinTree->find($criteria);
-		$this->_joinTree->afterFind();
-
-		if($all)
-			return array_values($this->_joinTree->records);
-		else if(count($this->_joinTree->records))
-			return reset($this->_joinTree->records);
-		else
-			return null;
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::find()}.
-	 */
-	public function find($condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.find() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createCriteria($condition,$params);
-		return $this->query($criteria);
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::findAll()}.
-	 */
-	public function findAll($condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findAll() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createCriteria($condition,$params);
-		return $this->query($criteria,true);
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::findByPk()}.
-	 */
-	public function findByPk($pk,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findByPk() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createPkCriteria($this->_joinTree->model->getTableSchema(),$pk,$condition,$params);
-		return $this->query($criteria);
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::findAllByPk()}.
-	 */
-	public function findAllByPk($pk,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findAllByPk() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createPkCriteria($this->_joinTree->model->getTableSchema(),$pk,$condition,$params);
-		return $this->query($criteria,true);
-	}
-
-	/**
-	 * This is  the relational version of {@link CActiveRecord::findByAttributes()}.
-	 */
-	public function findByAttributes($attributes,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findByAttributes() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createColumnCriteria($this->_joinTree->model->getTableSchema(),$attributes,$condition,$params);
-		return $this->query($criteria);
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::findAllByAttributes()}.
-	 */
-	public function findAllByAttributes($attributes,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findAllByAttributes() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createColumnCriteria($this->_joinTree->model->getTableSchema(),$attributes,$condition,$params);
-		return $this->query($criteria,true);
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::findBySql()}.
-	 */
-	public function findBySql($sql,$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findBySql() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		if(($row=$this->_builder->createSqlCommand($sql,$params)->queryRow())!==false)
-		{
-			$baseRecord=$this->_joinTree->model->populateRecord($row,false);
-			$this->_joinTree->findWithBase($baseRecord);
-			$this->_joinTree->afterFind();
-			return $baseRecord;
-		}
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::findAllBySql()}.
-	 */
-	public function findAllBySql($sql,$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.findAllBySql() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		if(($rows=$this->_builder->createSqlCommand($sql,$params)->queryAll())!==array())
-		{
-			$baseRecords=$this->_joinTree->model->populateRecords($rows,false);
-			$this->_joinTree->findWithBase($baseRecords);
-			$this->_joinTree->afterFind();
-			return $baseRecords;
-		}
-		else
-			return array();
-	}
-
-	/**
-	 * This is the relational version of {@link CActiveRecord::count()}.
-	 * @since 1.0.3
-	 */
-	public function count($condition='',$params=array())
-	{
-		Prado::trace(get_class($this->_joinTree->model).'.count() eagerly','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->_builder->createCriteria($condition,$params);
-		if($this->_criteria!==null)
-		{
-			$this->_criteria->mergeWith($criteria);
-			$criteria=$this->_criteria;
-		}
-		return $this->_joinTree->count($criteria);
-	}
-
-	/**
-	 * Finds the related objects for the specified active record.
-	 * This method is internally invoked by {@link CActiveRecord} to support lazy loading.
-	 * @param CActiveRecord the base record whose related objects are to be loaded
-	 */
-	public function lazyFind($baseRecord)
-	{
-		$this->_joinTree->lazyFind($baseRecord);
-		if(!empty($this->_joinTree->children))
-		{
-			$child=reset($this->_joinTree->children);
-			$child->afterFind();
-		}
-	}
-
-	/**
-	 * Builds up the join tree representing the relationships involved in this query.
-	 * @param CJoinElement the parent tree node
-	 * @param mixed the names of the related objects relative to the parent tree node
-	 * @param array additional query options to be merged with the relation
-	 */
-	private function buildJoinTree($parent,$with,$options=null)
-	{
-		if($parent instanceof CStatElement)
-			throw new TDbException('The STAT relation "'.($parent->relation->name).'" cannot have child relations.');
-
-		if(is_string($with))
-		{
-			if(($pos=strrpos($with,'.'))!==false)
-			{
-				$parent=$this->buildJoinTree($parent,substr($with,0,$pos));
-				$with=substr($with,$pos+1);
-			}
-
-			// named scope
-			if(($pos=strpos($with,':'))!==false)
-			{
-				$scopes=explode(':',substr($with,$pos+1));
-				$with=substr($with,0,$pos);
-			}
-
-			if(isset($parent->children[$with]))
-				return $parent->children[$with];
-
-			if(($relation=$parent->model->getActiveRelation($with))===null)
-				throw new TDbException('Relation "'.$with.'" is not defined in active record class "'.get_class($parent->model).'".');
-
-			$relation=clone $relation;
-			$model=TActiveRecord::model($relation->className);
-			if(($scope=$model->defaultScope())!==array())
-				$relation->mergeWith($scope);
-			if(isset($scopes) && !empty($scopes))
-			{
-				$scs=$model->scopes();
-				foreach($scopes as $scope)
-				{
-					if(isset($scs[$scope]))
-						$relation->mergeWith($scs[$scope]);
-					else
-						throw new TDbException('Active record class "'.get_class($model).'" does not have a scope named "'.$scope.'".');
-				}
-			}
-
-			// dynamic options
-			if($options!==null)
-				$relation->mergeWith($options);
-
-			if($relation instanceof TStatRelation)
-				return new TStatElement($this,$relation,$parent);
-			else
-			{
-				$element=$parent->children[$with]=new TJoinElement($this,$relation,$parent,++$this->_joinCount);
-				if(!empty($relation->with))
-					$this->buildJoinTree($element,$relation->with);
-				return $element;
-			}
-		}
-
-		// $with is an array, keys are relation name, values are relation spec
-		foreach($with as $key=>$value)
-		{
-			if(is_string($value))  // the value is a relation name
-				$this->buildJoinTree($parent,$value);
-			else if(is_string($key) && is_array($value))
-				$element=$this->buildJoinTree($parent,$key,$value);
-		}
-	}
-}
-
-
-/**
- * CJoinElement represents a tree node in the join tree created by {@link CActiveFinder}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TJoinElement
-{
-	/**
-	 * @var integer the unique ID of this tree node
-	 */
-	public $id;
-	/**
-	 * @var CActiveRelation the relation represented by this tree node
-	 */
-	public $relation;
-	/**
-	 * @var CActiveRecord the model associated with this tree node
-	 */
-	public $model;
-	/**
-	 * @var array list of active records found by the queries. They are indexed by primary key values.
-	 */
-	public $records=array();
-	/**
-	 * @var array list of child join elements
-	 */
-	public $children=array();
-	/**
-	 * @var array list of stat elements
-	 * @since 1.0.4
-	 */
-	public $stats=array();
-	/**
-	 * @var string table alias for this join element
-	 */
-	public $tableAlias;
-
-	private $_finder;
-	private $_builder;
-	private $_parent;
-	private $_pkAlias;  				// string or name=>alias
-	private $_columnAliases=array();	// name=>alias
-	private $_joined=false;
-	private $_table;
-	private $_related=array();			// PK, relation name, related PK => true
-
-	/**
-	 * Constructor.
-	 * @param CActiveFinder the finder
-	 * @param mixed the relation (if the third parameter is not null)
-	 * or the model (if the third parameter is null) associated with this tree node.
-	 * @param CJoinElement the parent tree node
-	 * @param integer the ID of this tree node that is unique among all the tree nodes
-	 */
-	public function __construct($finder,$relation,$parent=null,$id=0)
-	{
-		$this->_finder=$finder;
-		$this->id=$id;
-		if($parent!==null)
-		{
-			$this->relation=$relation;
-			$this->_parent=$parent;
-			$this->_builder=$parent->_builder;
-			$this->tableAlias=$relation->alias===null?$relation->name:$relation->alias;
-			$this->model=TActiveRecord::model($relation->className);
-			$this->_table=$this->model->getTableSchema();
-		}
-		else  // root element, the first parameter is the model.
-		{
-			$this->model=$relation;
-			$this->_builder=$relation->getCommandBuilder();
-			$this->_table=$relation->getTableSchema();
-		}
-
-		// set up column aliases, such as t1_c2
-		$table=$this->_table;
-		$prefix='t'.$id.'_c';
-		foreach($table->getColumnNames() as $key=>$name)
-		{
-			$alias=$prefix.$key;
-			$this->_columnAliases[$name]=$alias;
-			if($table->primaryKey===$name)
-				$this->_pkAlias=$alias;
-			else if(is_array($table->primaryKey) && in_array($name,$table->primaryKey))
-				$this->_pkAlias[$name]=$alias;
-		}
-	}
-
-	/**
-	 * Performs the recursive finding with the criteria.
-	 * @param CDbCriteria the query criteria
-	 */
-	public function find($criteria=null)
-	{
-		if($this->_parent===null) // root element
-		{
-			$query=new TJoinQuery($this,$criteria);
-			$this->_finder->baseLimited=($criteria->offset>=0 || $criteria->limit>=0);
-			$this->buildQuery($query);
-			$this->_finder->baseLimited=false;
-			$this->runQuery($query);
-		}
-		else if(!$this->_joined && !empty($this->_parent->records)) // not joined before
-		{
-			$query=new TJoinQuery($this->_parent);
-			$this->_joined=true;
-			$query->join($this);
-			$this->buildQuery($query);
-			$this->_parent->runQuery($query);
-		}
-
-		foreach($this->children as $child) // find recursively
-			$child->find();
-
-		foreach($this->stats as $stat)
-			$stat->query();
-	}
-
-	/**
-	 * Performs lazy find with the specified base record.
-	 * @param CActiveRecord the active record whose related object is to be fetched.
-	 */
-	public function lazyFind($baseRecord)
-	{
-		if(is_string($this->_table->primaryKey))
-			$this->records[$baseRecord->{$this->_table->primaryKey}]=$baseRecord;
-		else
-		{
-			$pk=array();
-			foreach($this->_table->primaryKey as $name)
-				$pk[$name]=$baseRecord->$name;
-			$this->records[serialize($pk)]=$baseRecord;
-		}
-
-		foreach($this->stats as $stat)
-			$stat->query();
-
-		if(empty($this->children))
-			return;
-
-		$child=reset($this->children);
-		$query=new TJoinQuery($this);
-		$this->_joined=true;
-		$child->_joined=true;
-		$query->join($child);
-		if($child->relation instanceof THasManyRelation)
-		{
-			$query->limit=$child->relation->limit;
-			$query->offset=$child->relation->offset;
-			$this->_finder->baseLimited=($query->offset>=0 || $query->limit>=0);
-			$query->groups[]=$child->relation->group;
-			$query->havings[]=$child->relation->having;
-		}
-		$child->buildQuery($query);
-		$this->_finder->baseLimited=false;
-		$this->runQuery($query);
-		foreach($child->children as $c)
-			$c->find();
-	}
-
-	/**
-	 * Performs the eager loading with the base records ready.
-	 * @param mixed the available base record(s).
-	 */
-	public function findWithBase($baseRecords)
-	{
-		if(!is_array($baseRecords))
-			$baseRecords=array($baseRecords);
-		if(is_string($this->_table->primaryKey))
-		{
-			foreach($baseRecords as $baseRecord)
-				$this->records[$baseRecord->{$this->_table->primaryKey}]=$baseRecord;
-		}
-		else
-		{
-			foreach($baseRecords as $baseRecord)
-			{
-				$pk=array();
-				foreach($this->_table->primaryKey as $name)
-					$pk[$name]=$baseRecord->$name;
-				$this->records[serialize($pk)]=$baseRecord;
-			}
-		}
-
-		$query=new TJoinQuery($this);
-		$this->buildQuery($query);
-		if(count($query->joins)>1)
-			$this->runQuery($query);
-		foreach($this->children as $child)
-			$child->find();
-
-		foreach($this->stats as $stat)
-			$stat->query();
-	}
-
-	/**
-	 * Count the number of primary records returned by the join statement.
-	 * @param CDbCriteria the query criteria
-	 * @return integer number of primary records.
-	 * @since 1.0.3
-	 */
-	public function count($criteria=null)
-	{
-		$query=new TJoinQuery($this,$criteria);
-		// ensure only one big join statement is used
-		$this->_finder->baseLimited=false;
-		$this->_finder->joinAll=true;
-		$this->buildQuery($query);
-
-		if(is_string($this->_table->primaryKey))
-		{
-			$prefix=$this->getColumnPrefix();
-			$schema=$this->_builder->getSchema();
-			$column=$prefix.$schema->quoteColumnName($this->_table->primaryKey);
-		}
-		else if($criteria->select!=='*')
-			$column=$criteria->select;
-		else
-			throw new TDbException('Unable to count records with composite primary keys. Please explicitly specify the SELECT option in the query criteria.');
-
-		$query->selects=array("COUNT(DISTINCT $column)");
-		$query->orders=$query->groups=$query->havings=array();
-		$command=$query->createCommand($this->_builder);
-		return $command->queryScalar();
-	}
-
-	/**
-	 * Calls {@link CActiveRecord::afterFind} of all the records.
-	 * @since 1.0.3
-	 */
-	public function afterFind()
-	{
-		foreach($this->records as $record)
-			$record->afterFindInternal();
-		foreach($this->children as $child)
-			$child->afterFind();
-	}
-
-	/**
-	 * Builds the join query with all descendant HAS_ONE and BELONGS_TO nodes.
-	 * @param CJoinQuery the query being built up
-	 */
-	public function buildQuery($query)
-	{
-		foreach($this->children as $child)
-		{
-			if($child->relation instanceof THasOneRelation || $child->relation instanceof TBelongsToRelation
-				|| $this->_finder->joinAll || !$this->_finder->baseLimited && $child->relation->together)
-			{
-				$child->_joined=true;
-				$query->join($child);
-				$child->buildQuery($query);
-			}
-		}
-	}
-
-	/**
-	 * Executes the join query and populates the query results.
-	 * @param CJoinQuery the query to be executed.
-	 */
-	public function runQuery($query)
-	{
-		$command=$query->createCommand($this->_builder);
-		foreach($command->queryAll() as $row)
-			$this->populateRecord($query,$row);
-	}
-
-	/**
-	 * Populates the active records with the query data.
-	 * @param CJoinQuery the query executed
-	 * @param array a row of data
-	 * @return CActiveRecord the populated record
-	 */
-	private function populateRecord($query,$row)
-	{
-		// determine the primary key value
-		if(is_string($this->_pkAlias))  // single key
-		{
-			if(isset($row[$this->_pkAlias]))
-				$pk=$row[$this->_pkAlias];
-			else	// no matching related objects
-				return null;
-		}
-		else // is_array, composite key
-		{
-			$pk=array();
-			foreach($this->_pkAlias as $name=>$alias)
-			{
-				if(isset($row[$alias]))
-					$pk[$name]=$row[$alias];
-				else	// no matching related objects
-					return null;
-			}
-			$pk=serialize($pk);
-		}
-
-		// retrieve or populate the record according to the primary key value
-		if(isset($this->records[$pk]))
-			$record=$this->records[$pk];
-		else
-		{
-			$attributes=array();
-			$aliases=array_flip($this->_columnAliases);
-			foreach($row as $alias=>$value)
-			{
-				if(isset($aliases[$alias]))
-					$attributes[$aliases[$alias]]=$value;
-			}
-			$record=$this->model->populateRecord($attributes,false);
-			foreach($this->children as $child)
-				$record->addRelatedRecord($child->relation->name,null,$child->relation instanceof THasManyRelation);
-			$this->records[$pk]=$record;
-		}
-
-		// populate child records recursively
-		foreach($this->children as $child)
-		{
-			if(!isset($query->elements[$child->id]))
-				continue;
-			$childRecord=$child->populateRecord($query,$row);
-			if($child->relation instanceof THasOneRelation || $child->relation instanceof TBelongsToRelation)
-				$record->addRelatedRecord($child->relation->name,$childRecord,false);
-			else // has_many and many_many
-			{
-				// need to double check to avoid adding duplicated related objects
-				if($childRecord instanceof TActiveRecord)
-					$fpk=serialize($childRecord->getPrimaryKey());
-				else
-					$fpk=0;
-				if(!isset($this->_related[$pk][$child->relation->name][$fpk]))
-				{
-					$record->addRelatedRecord($child->relation->name,$childRecord,true);
-					$this->_related[$pk][$child->relation->name][$fpk]=true;
-				}
-			}
-		}
-
-		return $record;
-	}
-
-	/**
-	 * @return string the table name and the table alias (if any). This can be used directly in SQL query without escaping.
-	 */
-	public function getTableNameWithAlias()
-	{
-		if($this->tableAlias!==null)
-			return $this->_table->rawName . ' ' . $this->tableAlias;
-		else
-			return $this->_table->rawName;
-	}
-
-	/**
-	 * Generates the list of columns to be selected.
-	 * Columns will be properly aliased and primary keys will be added to selection if they are not specified.
-	 * @param mixed columns to be selected. Defaults to '*', indicating all columns.
-	 * @return string the column selection
-	 */
-	public function getColumnSelect($select='*')
-	{
-		$schema=$this->_builder->getSchema();
-		$prefix=$this->getColumnPrefix();
-		$columns=array();
-		if($select==='*')
-		{
-			foreach($this->_table->getColumnNames() as $name)
-				$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($this->_columnAliases[$name]);
-		}
-		else
-		{
-			if(is_string($select))
-				$select=explode(',',$select);
-			$selected=array();
-			foreach($select as $name)
-			{
-				$name=trim($name);
-				$matches=array();
-				if(($pos=strrpos($name,'.'))!==false)
-					$key=substr($name,$pos+1);
-				else
-					$key=$name;
-				if(isset($this->_columnAliases[$key]))  // simple column names
-				{
-					$columns[]=$prefix.$schema->quoteColumnName($key).' AS '.$schema->quoteColumnName($this->_columnAliases[$key]);
-					$selected[$this->_columnAliases[$key]]=1;
-				}
-				else if(preg_match('/^(.*?)\s+AS\s+(\w+)$/i',$name,$matches)) // if the column is already aliased
-				{
-					$alias=$matches[2];
-					if(!isset($this->_columnAliases[$alias]) || $this->_columnAliases[$alias]!==$alias)
-					{
-						$this->_columnAliases[$alias]=$alias;
-						$columns[]=$name;
-						$selected[$alias]=1;
-					}
-				}
-				else
-					throw new TDbException('Active record "'.get_class($this->model).'" is trying to select an invalid column "'.$name.'". Note, the column must exist in the table or be an expression with alias.');
-			}
-			// add primary key selection if they are not selected
-			if(is_string($this->_pkAlias) && !isset($selected[$this->_pkAlias]))
-				$columns[]=$prefix.$schema->quoteColumnName($this->_table->primaryKey).' AS '.$schema->quoteColumnName($this->_pkAlias);
-			else if(is_array($this->_pkAlias))
-			{
-				foreach($this->_table->primaryKey as $name)
-					if(!isset($selected[$name]))
-						$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($this->_pkAlias[$name]);
-			}
-		}
-
-		return implode(', ',$columns);
-	}
-
-	/**
-	 * @return string the primary key selection
-	 */
-	public function getPrimaryKeySelect()
-	{
-		$schema=$this->_builder->getSchema();
-		$prefix=$this->getColumnPrefix();
-		$columns=array();
-		if(is_string($this->_pkAlias))
-			$columns[]=$prefix.$schema->quoteColumnName($this->_table->primaryKey).' AS '.$schema->quoteColumnName($this->_pkAlias);
-		else if(is_array($this->_pkAlias))
-		{
-			foreach($this->_pkAlias as $name=>$alias)
-				$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($alias);
-		}
-		return implode(', ',$columns);
-	}
-
-	/**
-	 * @return string the condition that specifies only the rows with the selected primary key values.
-	 */
-	public function getPrimaryKeyRange()
-	{
-		if(empty($this->records))
-			return '';
-		$values=array_keys($this->records);
-		if(is_array($this->_table->primaryKey))
-		{
-			foreach($values as &$value)
-				$value=unserialize($value);
-		}
-		return $this->_builder->createInCondition($this->_table,$this->_table->primaryKey,$values,$this->getColumnPrefix());
-	}
-
-	/**
-	 * @return string the column prefix for column reference disambiguation
-	 */
-	public function getColumnPrefix()
-	{
-		if($this->tableAlias!==null)
-			return $this->tableAlias.'.';
-		else
-			return $this->_table->rawName.'.';
-	}
-
-	/**
-	 * @return string the join statement (this node joins with its parent)
-	 */
-	public function getJoinCondition()
-	{
-		$parent=$this->_parent;
-		$relation=$this->relation;
-		if($this->relation instanceof TManyManyRelation)
-		{
-			if(!preg_match('/^\s*(.*?)\((.*)\)\s*$/',$this->relation->foreignKey,$matches))
-				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key. The format of the foreign key must be "joinTable(fk1,fk2,...)".');
-
-			$schema=$this->_builder->getSchema();
-			if(($joinTable=$schema->getTable($matches[1]))===null)
-				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is not specified correctly: the join table "'.($matches[1]).'" given in the foreign key cannot be found in the database.');
-				
-			$fks=preg_split('/[\s,]+/',$matches[2],-1,PREG_SPLIT_NO_EMPTY);
-
-			return $this->joinManyMany($joinTable,$fks,$parent);
-		}
-		else
-		{
-			$fks=preg_split('/[\s,]+/',$relation->foreignKey,-1,PREG_SPLIT_NO_EMPTY);
-			if($this->relation instanceof TBelongsToRelation)
-			{
-				$pke=$this;
-				$fke=$parent;
-			}
-			else
-			{
-				$pke=$parent;
-				$fke=$this;
-			}
-			return $this->joinOneMany($fke,$fks,$pke,$parent);
-		}
-	}
-
-	/**
-	 * Generates the join statement for one-many relationship.
-	 * This works for HAS_ONE, HAS_MANY and BELONGS_TO.
-	 * @param CJoinElement the join element containing foreign keys
-	 * @param array the foreign keys
-	 * @param CJoinElement the join element containg primary keys
-	 * @param CJoinElement the parent join element
-	 * @return string the join statement
-	 * @throws CDbException if a foreign key is invalid
-	 */
-	private function joinOneMany($fke,$fks,$pke,$parent)
-	{
-		$schema=$this->_builder->getSchema();
-		$joins=array();
-		foreach($fks as $i=>$fk)
-		{
-			if(!isset($fke->_table->columns[$fk]))
-				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($fke->_table->name).'".');
-
-			if(isset($fke->_table->foreignKeys[$fk]))
-				$pk=$fke->_table->foreignKeys[$fk][1];
-			else  // FK constraints undefined
-			{
-				if(is_array($pke->_table->primaryKey)) // composite PK
-					$pk=$pke->_table->primaryKey[$i];
-				else
-					$pk=$pke->_table->primaryKey;
-			}
-			$joins[]=$fke->getColumnPrefix().$schema->quoteColumnName($fk) . '=' . $pke->getColumnPrefix().$schema->quoteColumnName($pk);
-		}
-		if(!empty($this->relation->on))
-			$joins[]=$this->relation->on;
-		return $this->relation->joinType . ' ' . $this->getTableNameWithAlias() . ' ON (' . implode(') AND (',$joins).')';
-	}
-
-	/**
-	 * Generates the join statement for many-many relationship.
-	 * @param CDbTableSchema the join table
-	 * @param array the foreign keys
-	 * @param CJoinElement the parent join element
-	 * @return string the join statement
-	 * @throws CDbException if a foreign key is invalid
-	 */
-	private function joinManyMany($joinTable,$fks,$parent)
-	{
-		$schema=$this->_builder->getSchema();
-		$joinAlias=$this->relation->name.'_'.$this->tableAlias;
-		$parentCondition=array();
-		$childCondition=array();
-		foreach($fks as $i=>$fk)
-		{
-			if(!isset($joinTable->columns[$fk]))
-				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($joinTable->name).'".');
-
-			if(isset($joinTable->foreignKeys[$fk]))
-			{
-				list($tableName,$pk)=$joinTable->foreignKeys[$fk];
-				if(!isset($parentCondition[$pk]) && $schema->compareTableNames($parent->_table->rawName,$tableName))
-					$parentCondition[$pk]=$parent->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
-				else if(!isset($childCondition[$pk]) && $schema->compareTableNames($this->_table->rawName,$tableName))
-					$childCondition[$pk]=$this->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
-				else
-					throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". The foreign key does not point to either joining table.');
-			}
-			else // FK constraints not defined
-			{
-				if($i<count($parent->_table->primaryKey))
-				{
-					$pk=is_array($parent->_table->primaryKey) ? $parent->_table->primaryKey[$i] : $parent->_table->primaryKey;
-					$parentCondition[$pk]=$parent->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
-				}
-				else
-				{
-					$j=$i-count($parent->_table->primaryKey);
-					$pk=is_array($this->_table->primaryKey) ? $this->_table->primaryKey[$j] : $this->_table->primaryKey;
-					$childCondition[$pk]=$this->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
-				}
-			}
-		}
-		if($parentCondition!==array() && $childCondition!==array())
-		{
-			$join=$this->relation->joinType.' '.$joinTable->rawName.' '.$joinAlias;
-			$join.=' ON ('.implode(') AND (',$parentCondition).')';
-			$join.=' '.$this->relation->joinType.' '.$this->getTableNameWithAlias();
-			$join.=' ON ('.implode(') AND (',$childCondition).')';
-			if(!empty($this->relation->on))
-				$join.=' AND ('.$this->relation->on.')';
-			return $join;
-		}
-		else
-			throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.');
-	}
-}
-
-
-/**
- * CJoinQuery represents a JOIN SQL statement.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TJoinQuery
-{
-	/**
-	 * @var array list of column selections
-	 */
-	public $selects=array();
-	/**
-	 * @var array list of join statement
-	 */
-	public $joins=array();
-	/**
-	 * @var array list of WHERE clauses
-	 */
-	public $conditions=array();
-	/**
-	 * @var array list of ORDER BY clauses
-	 */
-	public $orders=array();
-	/**
-	 * @var array list of GROUP BY clauses
-	 */
-	public $groups=array();
-	/**
-	 * @var array list of HAVING clauses
-	 */
-	public $havings=array();
-	/**
-	 * @var integer row limit
-	 */
-	public $limit=-1;
-	/**
-	 * @var integer row offset
-	 */
-	public $offset=-1;
-	/**
-	 * @var array list of query parameters
-	 */
-	public $params=array();
-	/**
-	 * @var array list of join element IDs (id=>true)
-	 */
-	public $elements=array();
-
-	/**
-	 * Constructor.
-	 * @param CJoinElement The root join tree.
-	 * @param CDbCriteria the query criteria
-	 */
-	public function __construct($joinElement,$criteria=null)
-	{
-		if($criteria!==null)
-		{
-			$this->selects[]=$joinElement->getColumnSelect($criteria->select);
-			$this->joins[]=$joinElement->getTableNameWithAlias();
-			$this->joins[]=$criteria->join;
-			$this->conditions[]=$criteria->condition;
-			$this->orders[]=$criteria->order;
-			$this->groups[]=$criteria->group;
-			$this->havings[]=$criteria->having;
-			$this->limit=$criteria->limit;
-			$this->offset=$criteria->offset;
-			$this->params=$criteria->params;
-		}
-		else
-		{
-			$this->selects[]=$joinElement->getPrimaryKeySelect();
-			$this->joins[]=$joinElement->getTableNameWithAlias();
-			$this->conditions[]=$joinElement->getPrimaryKeyRange();
-		}
-		$this->elements[$joinElement->id]=true;
-	}
-
-	/**
-	 * Joins with another join element
-	 * @param CJoinElement the element to be joined
-	 */
-	public function join($element)
-	{
-		$this->selects[]=$element->getColumnSelect($element->relation->select);
-		$this->conditions[]=$element->relation->condition;
-		$this->orders[]=$element->relation->order;
-		$this->joins[]=$element->getJoinCondition();
-		$this->groups[]=$element->relation->group;
-		$this->havings[]=$element->relation->having;
-
-		if(is_array($element->relation->params))
-		{
-			if(is_array($this->params))
-				$this->params=array_merge($this->params,$element->relation->params);
-			else
-				$this->params=$element->relation->params;
-		}
-		$this->elements[$element->id]=true;
-	}
-
-	/**
-	 * Creates the SQL statement.
-	 * @param CDbCommandBuilder the command builder
-	 * @return string the SQL statement
-	 */
-	public function createCommand($builder)
-	{
-		$sql='SELECT ' . implode(', ',$this->selects);
-		$sql.=' FROM ' . implode(' ',$this->joins);
-
-		$conditions=array();
-		foreach($this->conditions as $condition)
-			if($condition!=='')
-				$conditions[]=$condition;
-		if($conditions!==array())
-			$sql.=' WHERE (' . implode(') AND (',$conditions).')';
-
-		$groups=array();
-		foreach($this->groups as $group)
-			if($group!=='')
-				$groups[]=$group;
-		if($groups!==array())
-			$sql.=' GROUP BY ' . implode(', ',$groups);
-
-		$havings=array();
-		foreach($this->havings as $having)
-			if($having!=='')
-				$havings[]=$having;
-		if($havings!==array())
-			$sql.=' HAVING (' . implode(') AND (',$havings).')';
-
-		$orders=array();
-		foreach($this->orders as $order)
-			if($order!=='')
-				$orders[]=$order;
-		if($orders!==array())
-			$sql.=' ORDER BY ' . implode(', ',$orders);
-
-		$sql=$builder->applyLimit($sql,$this->limit,$this->offset);
-		$command=$builder->getDbConnection()->createCommand($sql);
-		$builder->bindValues($command,$this->params);
-		return $command;
-	}
-}
-
-
-/**
- * CStatElement represents STAT join element for {@link CActiveFinder}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0.4
- */
-class TStatElement
-{
-	/**
-	 * @var CActiveRelation the relation represented by this tree node
-	 */
-	public $relation;
-
-	private $_finder;
-	private $_parent;
-
-	/**
-	 * Constructor.
-	 * @param CActiveFinder the finder
-	 * @param CStatRelation the STAT relation
-	 * @param CJoinElement the join element owning this STAT element
-	 */
-	public function __construct($finder,$relation,$parent)
-	{
-		$this->_finder=$finder;
-		$this->_parent=$parent;
-		$this->relation=$relation;
-		$parent->stats[]=$this;
-	}
-
-	/**
-	 * Performs the STAT query.
-	 */
-	public function query()
-	{
-		if(preg_match('/^\s*(.*?)\((.*)\)\s*$/',$this->relation->foreignKey,$matches))
-			$this->queryManyMany($matches[1],$matches[2]);
-		else
-			$this->queryOneMany();
-	}
-
-	private function queryOneMany()
-	{
-		$relation=$this->relation;
-		$model=TActiveRecord::model($relation->className);
-		$builder=$model->getCommandBuilder();
-		$schema=$builder->getSchema();
-		$table=$model->getTableSchema();
-		$pkTable=$this->_parent->model->getTableSchema();
-
-		$fks=preg_split('/[\s,]+/',$relation->foreignKey,-1,PREG_SPLIT_NO_EMPTY);
-		if(count($fks)!==count($pkTable->primaryKey))
-			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key. The columns in the key must match the primary keys of the table "'.($pkTable->name).'".');
-
-		// set up mapping between fk and pk columns
-		$map=array();  // pk=>fk
-		foreach($fks as $i=>$fk)
-		{
-			if(!isset($table->columns[$fk]))
-				throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($table->name).'".');
-
-			if(isset($table->foreignKeys[$fk]))
-			{
-				list($tableName,$pk)=$table->foreignKeys[$fk];
-				if($schema->compareTableNames($pkTable->rawName,$tableName))
-					$map[$pk]=$fk;
-				else
-					throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($parent->model).'" is specified with a foreign key "'.$fk.'" that does not point to the parent table "'.($pkTable->name).'".');
-			}
-			else  // FK constraints undefined
-			{
-				if(is_array($table->primaryKey)) // composite PK
-					$map[$table->primaryKey[$i]]=$fk;
-			}
-		}
-
-		$records=$this->_parent->records;
-
-		$where=empty($relation->condition)?'' : ' WHERE ('.$relation->condition.')';
-		$group=empty($relation->group)?'' : ', '.$relation->group;
-		$having=empty($relation->having)?'' : ' AND ('.$relation->having.')';
-		$order=empty($relation->order)?'' : ' ORDER BY '.$relation->order;
-
-		$c=$schema->quoteColumnName('c');
-		$s=$schema->quoteColumnName('s');
-
-		// generate and perform query
-		if(count($fks)===1)  // single column FK
-		{
-			$col=$table->columns[$fks[0]]->rawName;
-			$sql="SELECT $col AS $c, {$relation->select} AS $s FROM {$table->rawName}"
-				.$where
-				." GROUP BY $col".$group
-				." HAVING ".$builder->createInCondition($table,$fks[0],array_keys($records))
-				.$having.$order;
-			$command=$builder->getDbConnection()->createCommand($sql);
-			if(is_array($relation->params))
-				$builder->bindValues($command,$relation->params);
-			$stats=array();
-			foreach($command->queryAll() as $row)
-				$stats[$row['c']]=$row['s'];
-		}
-		else  // composite FK
-		{
-			$keys=array_keys($records);
-			foreach($keys as &$key)
-			{
-				$key2=unserialize($key);
-				$key=array();
-				foreach($pkTable->primaryKey as $pk)
-					$key[$map[$pk]]=$key2[$pk];
-			}
-			$cols=array();
-			foreach($pkTable->primaryKey as $n=>$pk)
-			{
-				$name=$table->columns[$map[$pk]]->rawName;
-				$cols[$name]=$name.' AS '.$schema->quoteColumnName('c'.$n);
-			}
-			$sql='SELECT '.implode(', ',$cols).", {$relation->select} AS $s FROM {$table->rawName}"
-				.$where
-				.' GROUP BY '.implode(', ',array_keys($cols)).$group
-				.' HAVING '.$builder->createInCondition($table,$fks,$keys)
-				.$having.$order;
-			$command=$builder->getDbConnection()->createCommand($sql);
-			if(is_array($relation->params))
-				$builder->bindValues($command,$relation->params);
-			$stats=array();
-			foreach($command->queryAll() as $row)
-			{
-				$key=array();
-				foreach($pkTable->primaryKey as $n=>$pk)
-					$key[$pk]=$row['c'.$n];
-				$stats[serialize($key)]=$row['s'];
-			}
-		}
-
-		// populate the results into existing records
-		foreach($records as $pk=>$record)
-			$record->addRelatedRecord($relation->name,isset($stats[$pk])?$stats[$pk]:$relation->defaultValue,false);
-	}
-
-	private function queryManyMany($joinTableName,$keys)
-	{
-		$relation=$this->relation;
-		$model=TActiveRecord::model($relation->className);
-		$table=$model->getTableSchema();
-		$builder=$model->getCommandBuilder();
-		$schema=$builder->getSchema();
-		$pkTable=$this->_parent->model->getTableSchema();
-
-		if(($joinTable=$builder->getSchema()->getTable($joinTableName))===null)
-			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is not specified correctly. The join table "'.$joinTableName.'" given in the foreign key cannot be found in the database.');
-
-		$fks=preg_split('/[\s,]+/',$keys,-1,PREG_SPLIT_NO_EMPTY);
-		if(count($fks)!==count($table->primaryKey)+count($pkTable->primaryKey))
-			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.');
-
-		$joinCondition=array();
-		$map=array();
-		foreach($fks as $i=>$fk)
-		{
-			if(!isset($joinTable->columns[$fk]))
-				throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($joinTable->name).'".');
-
-			if(isset($joinTable->foreignKeys[$fk]))
-			{
-				list($tableName,$pk)=$joinTable->foreignKeys[$fk];
-				if(!isset($joinCondition[$pk]) && $schema->compareTableNames($table->rawName,$tableName))
-					$joinCondition[$pk]=$table->rawName.'.'.$schema->quoteColumnName($pk).'='.$joinTable->rawName.'.'.$schema->quoteColumnName($fk);
-				else if(!isset($map[$pk]) && $schema->compareTableNames($pkTable->rawName,$tableName))
-					$map[$pk]=$fk;
-				else
-					throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an invalid foreign key "'.$fk.'". The foreign key does not point to either joining table.');
-			}
-			else // FK constraints not defined
-			{
-				if($i<count($pkTable->primaryKey))
-				{
-					$pk=is_array($pkTable->primaryKey) ? $pkTable->primaryKey[$i] : $pkTable->primaryKey;
-					$map[$pk]=$fk;
-				}
-				else
-				{
-					$j=$i-count($pkTable->primaryKey);
-					$pk=is_array($table->primaryKey) ? $table->primaryKey[$j] : $table->primaryKey;
-					$joinCondition[$pk]=$table->rawName.'.'.$schema->quoteColumnName($pk).'='.$joinTable->rawName.'.'.$schema->quoteColumnName($fk);
-				}
-			}
-		}
-
-		if($joinCondition===array() || $map===array())
-			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.');
-
-		$records=$this->_parent->records;
-
-		$cols=array();
-		foreach(is_string($pkTable->primaryKey)?array($pkTable->primaryKey):$pkTable->primaryKey as $n=>$pk)
-		{
-			$name=$joinTable->rawName.'.'.$schema->quoteColumnName($map[$pk]);
-			$cols[$name]=$name.' AS '.$schema->quoteColumnName('c'.$n);
-		}
-
-		$keys=array_keys($records);
-		if(is_array($pkTable->primaryKey))
-		{
-			foreach($keys as &$key)
-			{
-				$key2=unserialize($key);
-				$key=array();
-				foreach($pkTable->primaryKey as $pk)
-					$key[$map[$pk]]=$key2[$pk];
-			}
-		}
-
-		$where=empty($relation->condition)?'' : ' WHERE ('.$relation->condition.')';
-		$group=empty($relation->group)?'' : ', '.$relation->group;
-		$having=empty($relation->having)?'' : ' AND ('.$relation->having.')';
-		$order=empty($relation->order)?'' : ' ORDER BY '.$relation->order;
-
-		$sql='SELECT '.$this->relation->select.' AS '.$schema->quoteColumnName('s').', '.implode(', ',$cols)
-			.' FROM '.$table->rawName.' INNER JOIN '.$joinTable->rawName
-			.' ON ('.implode(') AND (',$joinCondition).')'
-			.$where
-			.' GROUP BY '.implode(', ',array_keys($cols)).$group
-			.' HAVING ('.$builder->createInCondition($joinTable,$map,$keys).')'
-			.$having.$order;
-
-		$command=$builder->getDbConnection()->createCommand($sql);
-		if(is_array($relation->params))
-			$builder->bindValues($command,$relation->params);
-
-		$stats=array();
-		foreach($command->queryAll() as $row)
-		{
-			if(is_array($pkTable->primaryKey))
-			{
-				$key=array();
-				foreach($pkTable->primaryKey as $n=>$k)
-					$key[$k]=$row['c'.$n];
-				$stats[serialize($key)]=$row['s'];
-			}
-			else
-				$stats[$row['c0']]=$row['s'];
-		}
-
-		foreach($records as $pk=>$record)
-			$record->addRelatedRecord($relation->name,isset($stats[$pk])?$stats[$pk]:$this->relation->defaultValue,false);
-	}
-}
diff --git a/framework/Db/ActiveRecord/TActiveRecord.php b/framework/Db/ActiveRecord/TActiveRecord.php
deleted file mode 100644
index c0ffc32e..00000000
--- a/framework/Db/ActiveRecord/TActiveRecord.php
+++ /dev/null
@@ -1,1843 +0,0 @@
-<?php
-/**
- * CActiveRecord class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * CActiveRecord is the base class for classes representing relational data.
- *
- * It implements the active record design pattern, a popular Object-Relational Mapping (ORM) technique.
- * Please check {@link http://www.yiiframework.com/doc/guide/database.ar the Guide} for more details
- * about this class.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-
-Prado::using('System.Base.TModel');
-Prado::using('System.Db.*');
-Prado::using('System.Db.ActiveRecord.*');
-Prado::using('System.Base.TEvent');
-Prado::using('System.Db.ActiveRecord.TActiveRecordCriteria');
-
-abstract class TActiveRecord extends TModel
-{
-	const BELONGS_TO='TBelongsToRelation';
-	const HAS_ONE='THasOneRelation';
-	const HAS_MANY='THasManyRelation';
-	const MANY_MANY='TManyManyRelation';
-	const STAT='TStatRelation';
-
-	/**
-	 * @var CDbConnection the default database connection for all active record classes.
-	 * By default, this is the 'db' application component.
-	 * @see getDbConnection
-	 */
-	public static $db;
-
-	private static $_models=array();			// class name => model
-
-	private $_md;								// meta data
-	private $_new=false;						// whether this instance is new or not
-	private $_attributes=array();				// attribute name => attribute value
-	private $_related=array();					// attribute name => related objects
-	private $_c;								// query criteria (used by finder only)
-
-	/**
-	 * Returns the instance of a active record finder for a particular class.
-	 * The finder objects are static instances for each ActiveRecord class.
-	 * This means that event handlers bound to these finder instances are class wide.
-	 * Create a new instance of the ActiveRecord class if you wish to bound the
-	 * event handlers to object instance.
-	 * @param string active record class name.
-	 * @return TActiveRecord active record finder instance.
-	 */
- 
-	/**
-	 * Constructor.
-	 * @param string scenario name. See {@link CModel::scenario} for more details about this parameter.
-	 */
-	public function __construct($scenario='insert')
-	{
-		if($scenario===null) // internally used by populateRecord() and model()
-			return;
-
-		$this->setScenario($scenario);
-		$this->setIsNewRecord(true);
-		$this->_attributes=$this->getMetaData()->attributeDefaults;
-
-		$this->attachBehaviors($this->behaviors());
-		$this->afterConstruct();
-	}
-
-	/**
-	 * PHP sleep magic method.
-	 * This method ensures that the model meta data reference is set to null.
-	 */
-	public function __sleep()
-	{
-		$this->_md=null;
-		return array_keys((array)$this);
-	}
-
-	/**
-	 * PHP getter magic method.
-	 * This method is overridden so that AR attributes can be accessed like properties.
-	 * @param string property name
-	 * @return mixed property value
-	 * @see getAttribute
-	 */
-	public function __get($name)
-	{
-		if(isset($this->_attributes[$name]))
-			return $this->_attributes[$name];
-		else if(isset($this->getMetaData()->columns[$name]))
-			return null;
-		else if(isset($this->_related[$name]))
-			return $this->_related[$name];
-		else if(isset($this->getMetaData()->relations[$name]))
-			return $this->getRelated($name);
-		else
-			return parent::__get($name);
-	}
-
-	/**
-	 * PHP setter magic method.
-	 * This method is overridden so that AR attributes can be accessed like properties.
-	 * @param string property name
-	 * @param mixed property value
-	 */
-	public function __set($name,$value)
-	{
-		if($this->setAttribute($name,$value)===false)
-			parent::__set($name,$value);
-	}
-
-	/**
-	 * Checks if a property value is null.
-	 * This method overrides the parent implementation by checking
-	 * if the named attribute is null or not.
-	 * @param string the property name or the event name
-	 * @return boolean whether the property value is null
-	 * @since 1.0.1
-	 */
-	public function __isset($name)
-	{
-		if(isset($this->_attributes[$name]))
-			return true;
-		else if(isset($this->getMetaData()->columns[$name]))
-			return false;
-		else if(isset($this->_related[$name]))
-			return true;
-		else if(isset($this->getMetaData()->relations[$name]))
-			return $this->getRelated($name)!==null;
-#		else
-#			return parent::__isset($name);
-	}
-
-	/**
-	 * Sets a component property to be null.
-	 * This method overrides the parent implementation by clearing
-	 * the specified attribute value.
-	 * @param string the property name or the event name
-	 * @since 1.0.1
-	 */
-	public function __unset($name)
-	{
-		if(isset($this->getMetaData()->columns[$name]))
-			unset($this->_attributes[$name]);
-		else if(isset($this->getMetaData()->relations[$name]))
-			unset($this->_related[$name]);
-		else
-			parent::__unset($name);
-	}
-
-	/**
-	 * Calls the named method which is not a class method.
-	 * Do not call this method. This is a PHP magic method that we override
-	 * to implement the named scope feature.
-	 * @param string the method name
-	 * @param array method parameters
-	 * @return mixed the method return value
-	 * @since 1.0.5
-	 * 
-	 * @TODO: implement __call to parent
-	 * 
-	 */
-	public function __call($name,$parameters)
-	{
-		if(isset($this->getMetaData()->relations[$name]))
-		{
-			if(empty($parameters))
-				return $this->getRelated($name,false);
-			else
-				return $this->getRelated($name,false,$parameters[0]);
-		}
-
-		$scopes=$this->scopes();
-		if(isset($scopes[$name]))
-		{
-			$this->getDbCriteria()->mergeWith($scopes[$name]);
-			return $this;
-		}
-
-# 		return parent::__call($name,$parameters);*/
-	}
-
-	/**
-	 * Returns the related record(s).
-	 * This method will return the related record(s) of the current record.
-	 * If the relation is HAS_ONE or BELONGS_TO, it will return a single object
-	 * or null if the object does not exist.
-	 * If the relation is HAS_MANY or MANY_MANY, it will return an array of objects
-	 * or an empty array.
-	 * @param string the relation name (see {@link relations})
-	 * @param boolean whether to reload the related objects from database. Defaults to false.
-	 * @param array additional parameters that customize the query conditions as specified in the relation declaration.
-	 * This parameter has been available since version 1.0.5.
-	 * @return mixed the related object(s).
-	 * @throws CDbException if the relation is not specified in {@link relations}.
-	 * @since 1.0.2
-	 */
-	public function getRelated($name,$refresh=false,$params=array())
-	{
-		if(!$refresh && $params===array() && (isset($this->_related[$name]) || array_key_exists($name,$this->_related)))
-			return $this->_related[$name];
-
-		$md=$this->getMetaData();
-		if(!isset($md->relations[$name]))
-			throw new TDbException(get_class($this).' does not have relation "'.$name.'".');
-
-		Prado::trace('lazy loading '.get_class($this).'.'.$name,'System.Db.ActiveRecord.TActiveRecord');
-		$relation=$md->relations[$name];
-		if($this->getIsNewRecord() && ($relation instanceof THasOneRelation || $relation instanceof THasManyRelation))
-			return $relation instanceof THasOneRelation ? null : array();
-
-		if($params!==array()) // dynamic query
-		{
-			$exists=isset($this->_related[$name]) || array_key_exists($name,$this->_related);
-			if($exists)
-				$save=$this->_related[$name];
-			unset($this->_related[$name]);
-			$r=array($name=>$params);
-		}
-		else
-			$r=$name;
-
-		$finder=new TActiveFinder($this,$r);
-		$finder->lazyFind($this);
-
-		if(!isset($this->_related[$name]))
-		{
-			if($relation instanceof THasManyRelation)
-				$this->_related[$name]=array();
-			else if($relation instanceof TStatRelation)
-				$this->_related[$name]=$relation->defaultValue;
-			else
-				$this->_related[$name]=null;
-		}
-
-		if($params!==array())
-		{
-			$results=$this->_related[$name];
-			if($exists)
-				$this->_related[$name]=$save;
-			else
-				unset($this->_related[$name]);
-			return $results;
-		}
-		else
-			return $this->_related[$name];
-	}
-
-	/**
-	 * Returns a value indicating whether the named related object(s) has been loaded.
-	 * @param string the relation name
-	 * @return booolean a value indicating whether the named related object(s) has been loaded.
-	 * @since 1.0.3
-	 */
-	public function hasRelated($name)
-	{
-		return isset($this->_related[$name]) || array_key_exists($name,$this->_related);
-	}
-
-	/**
-	 * Returns the query criteria associated with this model.
-	 * @param boolean whether to create a criteria instance if it does not exist. Defaults to true.
-	 * @return CDbCriteria the query criteria that is associated with this model.
-	 * This criteria is mainly used by {@link scopes named scope} feature to accumulate
-	 * different criteria specifications.
-	 * @since 1.0.5
-	 */
-	public function getDbCriteria($createIfNull=true)
-	{
-		if($this->_c===null)
-		{
-			if(($c=$this->defaultScope())!==array() || $createIfNull)
-				$this->_c=new TDbCriteria($c);
-		}
-		return $this->_c;
-	}
-
-	/**
-	 * Returns the default named scope that should be applied to all queries implicitly for this model.
-	 * The default implementation simply returns an empty array. You may override this method
-	 * if the model needs to be queried with some default criteria (e.g. only active records should be returned).
-	 * @return array the query criteria. This will be used as the parameter to the constructor
-	 * of {@link CDbCriteria}.
-	 * @since 1.0.5
-	 */
-	public function defaultScope()
-	{
-		return array();
-	}
-
-	/**
-	 * Returns the static model of the specified AR class.
-	 * The model returned is a static instance of the AR class.
-	 * It is provided for invoking class-level methods (something similar to static class methods.)
-	 *
-	 * EVERY derived AR class must override this method as follows,
-	 * <pre>
-	 * public static function model($className=__CLASS__)
-	 * {
-	 *     return parent::model($className);
-	 * }
-	 * </pre>
-	 *
-	 * @param string active record class name.
-	 * @return CActiveRecord active record model instance.
-	 */
-	public static function model($className=__CLASS__)
-	{
-		if(isset(self::$_models[$className]))
-			return self::$_models[$className];
-		else
-		{
-			$model=self::$_models[$className]=new $className(null);
-			$model->attachBehaviors($model->behaviors());
-			$model->_md=new TActiveRecordMetaData($model);
-			return $model;
-		}
-	}
-
-	/**
-	 * @return CActiveRecordMetaData the meta for this AR class.
-	 */
-	public function getMetaData()
-	{
-		if($this->_md!==null)
-			return $this->_md;
-		else
-			return $this->_md=self::model(get_class($this))->_md;
-	}
-
-	/**
-	 * Returns the name of the associated database table.
-	 * By default this method returns the class name as the table name.
-	 * You may override this method if the table is not named after this convention.
-	 * @return string the table name
-	 */
-	public function tableName()
-	{
-		return get_class($this);
-	}
-
-	/**
-	 * Returns the primary key of the associated database table.
-	 * This method is meant to be overridden in case when the table is not defined with a primary key
-	 * (for some legency database). If the table is already defined with a primary key,
-	 * you do not need to override this method. The default implementation simply returns null,
-	 * meaning using the primary key defined in the database.
-	 * @return mixed the primary key of the associated database table.
-	 * If the key is a single column, it should return the column name;
-	 * If the key is a composite one consisting of several columns, it should
-	 * return the array of the key column names.
-	 * @since 1.0.4
-	 */
-	public function primaryKey()
-	{
-	}
-
-	/**
-	 * This method should be overridden to declare related objects.
-	 *
-	 * There are four types of relations that may exist between two active record objects:
-	 * <ul>
-	 * <li>BELONGS_TO: e.g. a member belongs to a team;</li>
-	 * <li>HAS_ONE: e.g. a member has at most one profile;</li>
-	 * <li>HAS_MANY: e.g. a team has many members;</li>
-	 * <li>MANY_MANY: e.g. a member has many skills and a skill belongs to a member.</li>
-	 * </ul>
-	 *
-	 * By declaring these relations, CActiveRecord can bring back related objects
-	 * in either lazy loading or eager loading approach, and you save the effort of
-	 * writing complex JOIN SQL statements.
-	 *
-	 * Each kind of related objects is defined in this method as an array with the following elements:
-	 * <pre>
-	 * 'varName'=>array('relationType', 'className', 'foreignKey', ...additional options)
-	 * </pre>
-	 * where 'varName' refers to the name of the variable/property that the related object(s) can
-	 * be accessed through; 'relationType' refers to the type of the relation, which can be one of the
-	 * following four constants: self::BELONGS_TO, self::HAS_ONE, self::HAS_MANY and self::MANY_MANY;
-	 * 'className' refers to the name of the active record class that the related object(s) is of;
-	 * and 'foreignKey' states the foreign key that relates the two kinds of active record.
-	 * Note, for composite foreign keys, they must be listed together, separating with space or comma;
-	 * and for foreign keys used in MANY_MANY relation, the joining table must be declared as well
-	 * (e.g. 'joinTable(fk1, fk2)').
-	 *
-	 * Additional options may be specified as name-value pairs in the rest array elements:
-	 * <ul>
-	 * <li>'select': string|array, a list of columns to be selected. Defaults to '*', meaning all columns.
-	 *   Column names should be disambiguated if they appear in an expression (e.g. COUNT(??.name) AS name_count).</li>
-	 * <li>'condition': string, the WHERE clause. Defaults to empty. Note, column references need to
-	 *   be disambiguated with prefix '??.' (e.g. ??.age&gt;20)</li>
-	 * <li>'order': string, the ORDER BY clause. Defaults to empty. Note, column references need to
-	 *   be disambiguated with prefix '??.' (e.g. ??.age DESC)</li>
-	 * <li>'with': string|array, a list of child related objects that should be loaded together with this object.
-	 *   Note, this is only honored by lazy loading, not eager loading.</li>
-	 * <li>'joinType': type of join. Defaults to 'LEFT OUTER JOIN'.</li>
-	 * <li>'alias': the alias for the table associated with this relationship.
-	 *   This option has been available since version 1.0.1. It defaults to null,
-	 *   meaning the table alias is the same as the relation name.</li>
-     * <li>'params': the parameters to be bound to the generated SQL statement.
-	 *   This should be given as an array of name-value pairs. This option has been
-	 *   available since version 1.0.3.</li>
-	 * <li>'on': the ON clause. The condition specified here will be appended
-	 *   to the joining condition using the AND operator. This option has been
-	 *   available since version 1.0.2.</li>
-	 * </ul>
-	 *
-	 * The following options are available for certain relations when lazy loading:
-	 * <ul>
-	 * <li>'group': string, the GROUP BY clause. Defaults to empty. Note, column references need to
-	 *   be disambiguated with prefix '??.' (e.g. ??.age). This option only applies to HAS_MANY and MANY_MANY relations.</li>
-	 * <li>'having': string, the HAVING clause. Defaults to empty. Note, column references need to
-	 *   be disambiguated with prefix '??.' (e.g. ??.age). This option only applies to HAS_MANY and MANY_MANY relations.</li>
-	 * <li>'limit': limit of the rows to be selected. This option does not apply to BELONGS_TO relation.</li>
-	 * <li>'offset': offset of the rows to be selected. This option does not apply to BELONGS_TO relation.</li>
-	 * </ul>
-	 *
-	 * Below is an example declaring related objects for 'Post' active record class:
-	 * <pre>
-	 * return array(
-	 *     'author'=>array(self::BELONGS_TO, 'User', 'authorID'),
-	 *     'comments'=>array(self::HAS_MANY, 'Comment', 'postID', 'with'=>'author', 'order'=>'createTime DESC'),
-	 *     'tags'=>array(self::MANY_MANY, 'Tag', 'PostTag(postID, tagID)', 'order'=>'name'),
-	 * );
-	 * </pre>
-	 *
-	 * @return array list of related object declarations. Defaults to empty array.
-	 */
-	public function relations()
-	{
-		return array();
-	}
-	
-	/**
-	 * Returns the declaration of named scopes.
-	 * A named scope represents a query criteria that can be chained together with
-	 * other named scopes and applied to a query. This method should be overridden
-	 * by child classes to declare named scopes for the particular AR classes.
-	 * For example, the following code declares two named scopes: 'recently' and
-	 * 'published'.
-	 * <pre>
-	 * return array(
-	 *     'published'=>array(
-	 *           'condition'=>'status=1',
-	 *     ),
-	 *     'recently'=>array(
-	 *           'order'=>'createTime DESC',
-	 *           'limit'=>5,
-	 *     ),
-	 * );
-	 * </pre>
-	 * If the above scopes are declared in a 'Post' model, we can perform the following
-	 * queries:
-	 * <pre>
-	 * $posts=Post::model()->published()->findAll();
-	 * $posts=Post::model()->published()->recently()->findAll();
-	 * $posts=Post::model()->published()->with('comments')->findAll();
-	 * </pre>
-	 * Note that the last query is a relational query.
-	 *
-	 * @return array the scope definition. The array keys are scope names; the array
-	 * values are the corresponding scope definitions. Each scope definition is represented
-	 * as an array whose keys must be properties of {@link CDbCriteria}.
-	 * @since 1.0.5
-	 */
-	public function scopes()
-	{
-		return array();
-	}
-
-	/**
-	 * Returns the list of all attribute names of the model.
-	 * This would return all column names of the table associated with this AR class.
-	 * @return array list of attribute names.
-	 * @since 1.0.1
-	 */
-	public function attributeNames()
-	{
-		return array_keys($this->getMetaData()->columns);
-	}
-
-	/**
-	 * Returns the database connection used by active record.
-	 * By default, the "db" application component is used as the database connection.
-	 * You may override this method if you want to use a different database connection.
-	 * @return CDbConnection the database connection used by active record.
-	 * 
-	 * @TODO Get default db connection if theres none set
-	 * 
-	 */
-	public function getDbConnection()
-	{
-		if(self::$db!==null)
-			return self::$db;
-		else
-		{
-			self::$db=Prado::getApplication()->getModule($this->getConnectionId())->getDbConnection();
-			if(self::$db instanceof TDbConnection)
-			{
-				self::$db->setActive(true);
-				return self::$db;
-			}
-			else
-				throw new TDbException('ActiveRecord requires a db connection.');
-		}
-	}
-
-	/**
-	 * Returns connection id (must be overloaded by child classes)
-	 * @return string Id of TDbConnection module
-	 */
-	abstract public function getConnectionId();
-
-	/**
-	 * @param string the relation name
-	 * @return CActiveRelation the named relation declared for this AR class. Null if the relation does not exist.
-	 */
-	public function getActiveRelation($name)
-	{
-		return isset($this->getMetaData()->relations[$name]) ? $this->getMetaData()->relations[$name] : null;
-	}
-
-	/**
-	 * @return CDbTableSchema the metadata of the table that this AR belongs to
-	 */
-	public function getTableSchema()
-	{
-		return $this->getMetaData()->tableSchema;
-	}
-
-	/**
-	 * @return CDbCommandBuilder the command builder used by this AR
-	 */
-	public function getCommandBuilder()
-	{
-		return $this->getDbConnection()->getSchema()->getCommandBuilder();
-	}
-
-	/**
-	 * @param string attribute name
-	 * @return boolean whether this AR has the named attribute (table column).
-	 */
-	public function hasAttribute($name)
-	{
-		return isset($this->getMetaData()->columns[$name]);
-	}
-
-	/**
-	 * Returns the named attribute value.
-	 * If this is a new record and the attribute is not set before,
-	 * the default column value will be returned.
-	 * If this record is the result of a query and the attribute is not loaded,
-	 * null will be returned.
-	 * You may also use $this->AttributeName to obtain the attribute value.
-	 * @param string the attribute name
-	 * @return mixed the attribute value. Null if the attribute is not set or does not exist.
-	 * @see hasAttribute
-	 */
-	public function getAttribute($name)
-	{
-		if(property_exists($this,$name))
-			return $this->$name;
-		else if(isset($this->_attributes[$name]))
-			return $this->_attributes[$name];
-	}
-
-	/**
-	 * Sets the named attribute value.
-	 * You may also use $this->AttributeName to set the attribute value.
-	 * @param string the attribute name
-	 * @param mixed the attribute value.
-	 * @return boolean whether the attribute exists and the assignment is conducted successfully
-	 * @see hasAttribute
-	 */
-	public function setAttribute($name,$value)
-	{
-		if(property_exists($this,$name))
-			$this->$name=$value;
-		else if(isset($this->getMetaData()->columns[$name]))
-			$this->_attributes[$name]=$value;
-		else
-			return false;
-		return true;
-	}
-
-	/**
-	 * Adds a related object to this record.
-	 * This method is used internally by {@link CActiveFinder} to populate related objects.
-	 * @param string attribute name
-	 * @param mixed the related record
-	 * @param boolean whether the relation is HAS_MANY/MANY_MANY.
-	 */
-	public function addRelatedRecord($name,$record,$multiple)
-	{
-		if($multiple)
-		{
-			if(!isset($this->_related[$name]))
-				$this->_related[$name]=array();
-			if($record instanceof TActiveRecord)
-				$this->_related[$name][]=$record;
-		}
-		else if(!isset($this->_related[$name]))
-			$this->_related[$name]=$record;
-	}
-
-	/**
-	 * Returns all column attribute values.
-	 * Note, related objects are not returned.
-	 * @param mixed names of attributes whose value needs to be returned.
-	 * If this is true (default), then all attribute values will be returned, including
-	 * those that are not loaded from DB (null will be returned for those attributes).
-	 * If this is null, all attributes except those that are not loaded from DB will be returned.
-	 * @return array attribute values indexed by attribute names.
-	 */
-	public function getAttributes($names=true)
-	{
-		$attributes=$this->_attributes;
-		foreach($this->getMetaData()->columns as $name=>$column)
-		{
-			if(property_exists($this,$name))
-				$attributes[$name]=$this->$name;
-			else if($names===true && !isset($attributes[$name]))
-				$attributes[$name]=null;
-		}
-		if(is_array($names))
-		{
-			$attrs=array();
-			foreach($names as $name)
-				$attrs[$name]=isset($attributes[$name])?$attributes[$name]:null;
-			return $attrs;
-		}
-		else
-			return $attributes;
-	}
-
-	/**
-	 * Saves the current record.
-	 *
-	 * The record is inserted as a row into the database table if its {@link isNewRecord}
-	 * property is true (usually the case when the record is created using the 'new'
-	 * operator). Otherwise, it will be used to update the corresponding row in the table
-	 * (usually the case if the record is obtained using one of those 'find' methods.)
-	 *
-	 * Validation will be performed before saving the record. If the validation fails,
-	 * the record will not be saved. You can call {@link getErrors()} to retrieve the
-	 * validation errors.
-	 *
-	 * If the record is saved via insertion, its {@link isNewRecord} property will be
-	 * set false, and its {@link scenario} property will be set to be 'update'.
-	 * And if its primary key is auto-incremental and is not set before insertion,
-	 * the primary key will be populated with the automatically generated key value.
-	 *
-	 * @param boolean whether to perform validation before saving the record.
-	 * If the validation fails, the record will not be saved to database.
-	 * @param array list of attributes that need to be saved. Defaults to null,
-	 * meaning all attributes that are loaded from DB will be saved.
-	 * @return boolean whether the saving succeeds
-	 */
-	public function save($runValidation=true,$attributes=null)
-	{
-		if(!$runValidation || $this->validate($attributes))
-			return $this->getIsNewRecord() ? $this->insert($attributes) : $this->update($attributes);
-		else
-			return false;
-	}
-
-	/**
-	 * @return boolean whether the record is new and should be inserted when calling {@link save}.
-	 * This property is automatically set in constructor and {@link populateRecord}.
-	 * Defaults to false, but it will be set to true if the instance is created using
-	 * the new operator.
-	 */
-	public function getIsNewRecord()
-	{
-		return $this->_new;
-	}
-
-	/**
-	 * @param boolean whether the record is new and should be inserted when calling {@link save}.
-	 * @see getIsNewRecord
-	 */
-	public function setIsNewRecord($value)
-	{
-		$this->_new=$value;
-	}
-
-	/**
-	 * This event is raised before the record is saved.
-	 * @param CEvent the event parameter
-	 * @since 1.0.2
-	 */
-	public function onBeforeSave($event)
-	{
-		$this->raiseEvent('onBeforeSave',$event);
-	}
-
-	/**
-	 * This event is raised after the record is saved.
-	 * @param CEvent the event parameter
-	 * @since 1.0.2
-	 */
-	public function onAfterSave($event)
-	{
-		$this->raiseEvent('onAfterSave',$event);
-	}
-
-	/**
-	 * This event is raised before the record is deleted.
-	 * @param CEvent the event parameter
-	 * @since 1.0.2
-	 */
-	public function onBeforeDelete($event)
-	{
-		$this->raiseEvent('onBeforeDelete',$event);
-	}
-
-	/**
-	 * This event is raised after the record is deleted.
-	 * @param CEvent the event parameter
-	 * @since 1.0.2
-	 */
-	public function onAfterDelete($event)
-	{
-		$this->raiseEvent('onAfterDelete',$event);
-	}
-
-	/**
-	 * This event is raised after the record instance is created by new operator.
-	 * @param CEvent the event parameter
-	 * @since 1.0.2
-	 */
-	public function onAfterConstruct($event)
-	{
-		$this->raiseEvent('onAfterConstruct',$event);
-	}
-
-	/**
-	 * This event is raised after the record is instantiated by a find method.
-	 * @param CEvent the event parameter
-	 * @since 1.0.2
-	 */
-	public function onAfterFind($event)
-	{
-		$this->raiseEvent('onAfterFind',$event);
-	}
-
-	/**
-	 * This method is invoked before saving a record (after validation, if any).
-	 * The default implementation raises the {@link onBeforeSave} event.
-	 * You may override this method to do any preparation work for record saving.
-	 * Use {@link isNewRecord} to determine whether the saving is
-	 * for inserting or updating record.
-	 * Make sure you call the parent implementation so that the event is raised properly.
-	 * @return boolean whether the saving should be executed. Defaults to true.
-	 */
-	protected function beforeSave()
-	{
-		$this->onBeforeSave(new TEvent($this));
-		return true;
-	}
-
-	/**
-	 * This method is invoked after saving a record.
-	 * The default implementation raises the {@link onAfterSave} event.
-	 * You may override this method to do postprocessing after record saving.
-	 * Make sure you call the parent implementation so that the event is raised properly.
-	 */
-	protected function afterSave()
-	{
-		$this->onAfterSave(new TEvent($this));
-	}
-
-	/**
-	 * This method is invoked before deleting a record.
-	 * The default implementation raises the {@link onBeforeDelete} event.
-	 * You may override this method to do any preparation work for record deletion.
-	 * Make sure you call the parent implementation so that the event is raised properly.
-	 * @return boolean whether the record should be deleted. Defaults to true.
-	 */
-	protected function beforeDelete()
-	{
-		$this->onBeforeDelete(new TEvent($this));
-		return true;
-	}
-
-	/**
-	 * This method is invoked after deleting a record.
-	 * The default implementation raises the {@link onAfterDelete} event.
-	 * You may override this method to do postprocessing after the record is deleted.
-	 * Make sure you call the parent implementation so that the event is raised properly.
-	 */
-	protected function afterDelete()
-	{
-		$this->onAfterDelete(new TEvent($this));
-	}
-
-	/**
-	 * This method is invoked after a record instance is created by new operator.
-	 * The default implementation raises the {@link onAfterConstruct} event.
-	 * You may override this method to do postprocessing after record creation.
-	 * Make sure you call the parent implementation so that the event is raised properly.
-	 */
-	protected function afterConstruct()
-	{
-		$this->onAfterConstruct(new TEvent($this));
-	}
-
-	/**
-	 * This method is invoked after each record is instantiated by a find method.
-	 * The default implementation raises the {@link onAfterFind} event.
-	 * You may override this method to do postprocessing after each newly found record is instantiated.
-	 * Make sure you call the parent implementation so that the event is raised properly.
-	 */
-	protected function afterFind()
-	{
-		$this->onAfterFind(new TEvent($this));
-	}
-
-	/**
-	 * Calls {@link afterFind}.
-	 * This method is internally used.
-	 * @since 1.0.3
-	 */
-	public function afterFindInternal()
-	{
-		$this->afterFind();
-	}
-
-	/**
-	 * Inserts a row into the table based on this active record attributes.
-	 * If the table's primary key is auto-incremental and is null before insertion,
-	 * it will be populated with the actual value after insertion.
-	 * Note, validation is not performed in this method. You may call {@link validate} to perform the validation.
-	 * After the record is inserted to DB successfully, its {@link isNewRecord} property will be set false,
-	 * and its {@link scenario} property will be set to be 'update'.
-	 * @param array list of attributes that need to be saved. Defaults to null,
-	 * meaning all attributes that are loaded from DB will be saved.
-	 * @return boolean whether the attributes are valid and the record is inserted successfully.
-	 * @throws CException if the record is not new
-	 */
-	public function insert($attributes=null)
-	{
-		if(!$this->getIsNewRecord())
-			throw new TDbException('The active record cannot be inserted to database because it is not new.');
-		if($this->beforeSave())
-		{
-			Prado::trace(get_class($this).'.insert()','System.Db.ActiveRecord.TActiveRecord');
-			$builder=$this->getCommandBuilder();
-			$table=$this->getMetaData()->tableSchema;
-			$command=$builder->createInsertCommand($table,$this->getAttributes($attributes));
-			if($command->execute())
-			{
-				$primaryKey=$table->primaryKey;
-				if($table->sequenceName!==null)
-				{
-					if(is_string($primaryKey) && $this->$primaryKey===null)
-						$this->$primaryKey=$builder->getLastInsertID($table);
-					else if(is_array($primaryKey))
-					{
-						foreach($primaryKey as $pk)
-						{
-							if($this->$pk===null)
-							{
-								$this->$pk=$builder->getLastInsertID($table);
-								break;
-							}
-						}
-					}
-				}
-				$this->afterSave();
-				$this->setIsNewRecord(false);
-				$this->setScenario('update');
-				return true;
-			}
-			else
-				$this->afterSave();
-		}
-		else
-			return false;
-	}
-
-	/**
-	 * Updates the row represented by this active record.
-	 * All loaded attributes will be saved to the database.
-	 * Note, validation is not performed in this method. You may call {@link validate} to perform the validation.
-	 * @param array list of attributes that need to be saved. Defaults to null,
-	 * meaning all attributes that are loaded from DB will be saved.
-	 * @return boolean whether the update is successful
-	 * @throws CException if the record is new
-	 */
-	public function update($attributes=null)
-	{
-		if($this->getIsNewRecord())
-			throw new TDbException('The active record cannot be updated because it is new.');
-		if($this->beforeSave())
-		{
-			Prado::trace(get_class($this).'.update()','System.Db.ActiveRecord.TActiveRecord');
-			$this->updateByPk($this->getPrimaryKey(),$this->getAttributes($attributes));
-			$this->afterSave();
-			return true;
-		}
-		else
-			return false;
-	}
-
-	/**
-	 * Saves a selected list of attributes.
-	 * Unlike {@link save}, this method only saves the specified attributes
-	 * of an existing row dataset. It thus has better performance.
-	 * Note, this method does neither attribute filtering nor validation.
-	 * So do not use this method with untrusted data (such as user posted data).
-	 * You may consider the following alternative if you want to do so:
-	 * <pre>
-	 * $postRecord=Post::model()->findByPk($postID);
-	 * $postRecord->attributes=$_POST['post'];
-	 * $postRecord->save();
-	 * </pre>
-	 * @param array attributes to be updated. Each element represents an attribute name
-	 * or an attribute value indexed by its name. If the latter, the record's
-	 * attribute will be changed accordingly before saving.
-	 * @return boolean whether the update is successful
-	 * @throws CException if the record is new or any database error
-	 */
-	public function saveAttributes($attributes)
-	{
-		if(!$this->getIsNewRecord())
-		{
-			Prado::trace(get_class($this).'.saveAttributes()','System.Db.ActiveRecord.TActiveRecord');
-			$values=array();
-			foreach($attributes as $name=>$value)
-			{
-				if(is_integer($name))
-					$values[$value]=$this->$value;
-				else
-					$values[$name]=$this->$name=$value;
-			}
-			return $this->updateByPk($this->getPrimaryKey(),$values)>0;
-		}
-		else
-			throw new TDbException('The active record cannot be updated because it is new.');
-	}
-
-	/**
-	 * Deletes the row corresponding to this active record.
-	 * @return boolean whether the deletion is successful.
-	 * @throws CException if the record is new
-	 */
-	public function delete()
-	{
-		if(!$this->getIsNewRecord())
-		{
-			Prado::trace(get_class($this).'.delete()','System.Db.ActiveRecord.TActiveRecord');
-			if($this->beforeDelete())
-			{
-				$result=$this->deleteByPk($this->getPrimaryKey())>0;
-				$this->afterDelete();
-				return $result;
-			}
-			else
-				return false;
-		}
-		else
-			throw new TDbException('The active record cannot be deleted because it is new.');
-	}
-
-	/**
-	 * Repopulates this active record with the latest data.
-	 * @return boolean whether the row still exists in the database. If true, the latest data will be populated to this active record.
-	 */
-	public function refresh()
-	{
-		Prado::trace(get_class($this).'.refresh()','System.Db.ActiveRecord.TActiveRecord');
-		if(!$this->getIsNewRecord() && ($record=$this->findByPk($this->getPrimaryKey()))!==null)
-		{
-			$this->_attributes=array();
-			$this->_related=array();
-			foreach($this->getMetaData()->columns as $name=>$column)
-				$this->$name=$record->$name;
-			return true;
-		}
-		else
-			return false;
-	}
-
-	/**
-	 * Compares this active record with another one.
-	 * The comparison is made by comparing the primary key values of the two active records.
-	 * @return boolean whether the two active records refer to the same row in the database table.
-	 */
-	public function equals($record)
-	{
-		return $this->tableName()===$record->tableName() && $this->getPrimaryKey()===$record->getPrimaryKey();
-	}
-
-	/**
-	 * @return mixed the primary key value. An array (column name=>column value) is returned if the primary key is composite.
-	 * If primary key is not defined, null will be returned.
-	 */
-	public function getPrimaryKey()
-	{
-		$table=$this->getMetaData()->tableSchema;
-		if(is_string($table->primaryKey))
-			return $this->{$table->primaryKey};
-		else if(is_array($table->primaryKey))
-		{
-			$values=array();
-			foreach($table->primaryKey as $name)
-				$values[$name]=$this->$name;
-			return $values;
-		}
-		else
-			return null;
-	}
-
-	private function query($criteria,$all=false)
-	{
-		$this->applyScopes($criteria);
-		$command=$this->getCommandBuilder()->createFindCommand($this->getTableSchema(),$criteria);
-		return $all ? $this->populateRecords($command->queryAll()) : $this->populateRecord($command->queryRow());
-	}
-
-	private function applyScopes(&$criteria)
-	{
-		if(($c=$this->getDbCriteria(false))!==null)
-		{
-			$c->mergeWith($criteria);
-			$criteria=$c;
-			$this->_c=null;
-		}
-	}
-
-	/**
-	 * Finds a single active record with the specified condition.
-	 * @param mixed query condition or criteria.
-	 * If a string, it is treated as query condition (the WHERE clause);
-	 * If an array, it is treated as the initial values for constructing a {@link CDbCriteria} object;
-	 * Otherwise, it should be an instance of {@link CDbCriteria}.
-	 * @param array parameters to be bound to an SQL statement.
-	 * This is only used when the first parameter is a string (query condition).
-	 * In other cases, please use {@link CDbCriteria::params} to set parameters.
-	 * @return CActiveRecord the record found. Null if no record is found.
-	 */
-	public function find($condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.find()','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->getCommandBuilder()->createCriteria($condition,$params);
-		$criteria->limit=1;
-		return $this->query($criteria);
-	}
-
-	/**
-	 * Finds all active records satisfying the specified condition.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return array list of active records satisfying the specified condition. An empty array is returned if none is found.
-	 */
-	public function findAll($condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.findAll()','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->getCommandBuilder()->createCriteria($condition,$params);
-		return $this->query($criteria,true);
-	}
-
-	/**
-	 * Finds a single active record with the specified primary key.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return CActiveRecord the record found. Null if none is found.
-	 */
-	public function findByPk($pk,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.findByPk()','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->getCommandBuilder()->createPkCriteria($this->getTableSchema(),$pk,$condition,$params);
-		$criteria->limit=1;
-		return $this->query($criteria);
-	}
-
-	/**
-	 * Finds all active records with the specified primary keys.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return array the records found. An empty array is returned if none is found.
-	 */
-	public function findAllByPk($pk,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.findAllByPk()','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->getCommandBuilder()->createPkCriteria($this->getTableSchema(),$pk,$condition,$params);
-		return $this->query($criteria,true);
-	}
-
-	/**
-	 * Finds a single active record that has the specified attribute values.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param array list of attribute values (indexed by attribute names) that the active records should match.
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return CActiveRecord the record found. Null if none is found.
-	 */
-	public function findByAttributes($attributes,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.findByAttributes()','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->getCommandBuilder()->createColumnCriteria($this->getTableSchema(),$attributes,$condition,$params);
-		$criteria->limit=1;
-		return $this->query($criteria);
-	}
-
-	/**
-	 * Finds all active records that have the specified attribute values.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param array list of attribute values (indexed by attribute names) that the active records should match.
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return array the records found. An empty array is returned if none is found.
-	 */
-	public function findAllByAttributes($attributes,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.findAllByAttributes()','System.Db.ActiveRecord.TActiveRecord');
-		$criteria=$this->getCommandBuilder()->createColumnCriteria($this->getTableSchema(),$attributes,$condition,$params);
-		return $this->query($criteria,true);
-	}
-
-	/**
-	 * Finds a single active record with the specified SQL statement.
-	 * @param string the SQL statement
-	 * @param array parameters to be bound to the SQL statement
-	 * @return CActiveRecord the record found. Null if none is found.
-	 */
-	public function findBySql($sql,$params=array())
-	{
-		Prado::trace(get_class($this).'.findBySql()','System.Db.ActiveRecord.TActiveRecord');
-		$command=$this->getCommandBuilder()->createSqlCommand($sql,$params);
-		return $this->populateRecord($command->queryRow());
-	}
-
-	/**
-	 * Finds all active records using the specified SQL statement.
-	 * @param string the SQL statement
-	 * @param array parameters to be bound to the SQL statement
-	 * @return array the records found. An empty array is returned if none is found.
-	 */
-	public function findAllBySql($sql,$params=array())
-	{
-		Prado::trace(get_class($this).'.findAllBySql()','System.Db.ActiveRecord.TActiveRecord');
-		$command=$this->getCommandBuilder()->createSqlCommand($sql,$params);
-		return $this->populateRecords($command->queryAll());
-	}
-
-	/**
-	 * Finds the number of rows satisfying the specified query condition.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return integer the number of rows satisfying the specified query condition.
-	 */
-	public function count($condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.count()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$criteria=$builder->createCriteria($condition,$params);
-		$this->applyScopes($criteria);
-		return $builder->createCountCommand($this->getTableSchema(),$criteria)->queryScalar();
-	}
-
-	/**
-	 * Finds the number of rows using the given SQL statement.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param string the SQL statement
-	 * @param array parameters to be bound to the SQL statement
-	 * @return integer the number of rows using the given SQL statement.
-	 */
-	public function countBySql($sql,$params=array())
-	{
-		Prado::trace(get_class($this).'.countBySql()','System.Db.ActiveRecord.TActiveRecord');
-		return $this->getCommandBuilder()->createSqlCommand($sql,$params)->queryScalar();
-	}
-
-	/**
-	 * Checks whether there is row satisfying the specified condition.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return boolean whether there is row satisfying the specified condition.
-	 */
-	public function exists($condition,$params=array())
-	{
-		Prado::trace(get_class($this).'.exists()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$criteria=$builder->createCriteria($condition,$params);
-		$table=$this->getTableSchema();
-		$criteria->select=reset($table->columns)->rawName;
-		$criteria->limit=1;
-		$this->applyScopes($criteria);
-		return $builder->createFindCommand($table,$criteria)->queryRow()!==false;
-	}
-
-	/**
-	 * Specifies which related objects should be eagerly loaded.
-	 * This method takes variable number of parameters. Each parameter specifies
-	 * the name of a relation or child-relation. For example,
-	 * <pre>
-	 * // find all posts together with their author and comments
-	 * Post::model()->with('author','comments')->findAll();
-	 * // find all posts together with their author and the author's profile
-	 * Post::model()->with('author','author.profile')->findAll();
-	 * </pre>
-	 * The relations should be declared in {@link relations()}.
-	 *
-	 * By default, the options specified in {@link relations()} will be used
-	 * to do relational query. In order to customize the options on the fly,
-	 * we should pass an array parameter to the with() method. The array keys
-	 * are relation names, and the array values are the corresponding query options.
-	 * For example,
-	 * <pre>
-	 * Post::model()->with(array(
-	 *     'author'=>array('select'=>'id, name'),
-	 *     'comments'=>array('condition'=>'approved=1', 'order'=>'createTime'),
-	 * ))->findAll();
-	 * </pre>
-	 *
-	 * This method returns a {@link CActiveFinder} instance that provides
-	 * a set of find methods similar to that of CActiveRecord.
-	 *
-	 * Note, the possible parameters to this method have been changed since version 1.0.2.
-	 * Previously, it was not possible to specify on-th-fly query options,
-	 * and child-relations were specified as hierarchical arrays.
-	 *
-	 * @return CActiveFinder the active finder instance. If no parameter is passed in, the object itself will be returned.
-	 */
-	public function with()
-	{
-		if(func_num_args()>0)
-		{
-			$with=func_get_args();
-			if(is_array($with[0]))  // the parameter is given as an array
-				$with=$with[0];
-			$finder=new TActiveFinder($this,$with,$this->getDbCriteria(false));
-			$this->_c=null;
-			return $finder;
-		}
-		else
-			return $this;
-	}
-
-	/**
-	 * Updates records with the specified primary key(s).
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * Note, the attributes are not checked for safety and validation is NOT performed.
-	 * @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
-	 * @param array list of attributes (name=>$value) to be updated
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return integer the number of rows being updated
-	 */
-	public function updateByPk($pk,$attributes,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.updateByPk()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$table=$this->getTableSchema();
-		$criteria=$builder->createPkCriteria($table,$pk,$condition,$params);
-		$this->applyScopes($criteria);
-		$command=$builder->createUpdateCommand($table,$attributes,$criteria);
-		return $command->execute();
-	}
-
-	/**
-	 * Updates records with the specified condition.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * Note, the attributes are not checked for safety and no validation is done.
-	 * @param array list of attributes (name=>$value) to be updated
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return integer the number of rows being updated
-	 */
-	public function updateAll($attributes,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.updateAll()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$criteria=$builder->createCriteria($condition,$params);
-		$this->applyScopes($criteria);
-		$command=$builder->createUpdateCommand($this->getTableSchema(),$attributes,$criteria);
-		return $command->execute();
-	}
-
-	/**
-	 * Updates one or several counter columns.
-	 * Note, this updates all rows of data unless a condition or criteria is specified.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param array the counters to be updated (column name=>increment value)
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return integer the number of rows being updated
-	 */
-	public function updateCounters($counters,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.updateCounters()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$criteria=$builder->createCriteria($condition,$params);
-		$this->applyScopes($criteria);
-		$command=$builder->createUpdateCounterCommand($this->getTableSchema(),$counters,$criteria);
-		return $command->execute();
-	}
-
-	/**
-	 * Deletes rows with the specified primary key.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return integer the number of rows deleted
-	 */
-	public function deleteByPk($pk,$condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.deleteByPk()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$criteria=$builder->createPkCriteria($this->getTableSchema(),$pk,$condition,$params);
-		$this->applyScopes($criteria);
-		$command=$builder->createDeleteCommand($this->getTableSchema(),$criteria);
-		return $command->execute();
-	}
-
-	/**
-	 * Deletes rows with the specified condition.
-	 * See {@link find()} for detailed explanation about $condition and $params.
-	 * @param mixed query condition or criteria.
-	 * @param array parameters to be bound to an SQL statement.
-	 * @return integer the number of rows deleted
-	 */
-	public function deleteAll($condition='',$params=array())
-	{
-		Prado::trace(get_class($this).'.deleteAll()','System.Db.ActiveRecord.TActiveRecord');
-		$builder=$this->getCommandBuilder();
-		$criteria=$builder->createCriteria($condition,$params);
-		$this->applyScopes($criteria);
-		$command=$builder->createDeleteCommand($this->getTableSchema(),$criteria);
-		return $command->execute();
-	}
-
-	/**
-	 * Creates an active record with the given attributes.
-	 * This method is internally used by the find methods.
-	 * @param array attribute values (column name=>column value)
-	 * @param boolean whether to call {@link afterFind} after the record is populated.
-	 * This parameter is added in version 1.0.3.
-	 * @return CActiveRecord the newly created active record. The class of the object is the same as the model class.
-	 * Null is returned if the input data is false.
-	 */
-	public function populateRecord($attributes,$callAfterFind=true)
-	{
-		if($attributes!==false)
-		{
-			$record=$this->instantiate($attributes);
-			$record->_md=$this->getMetaData();
-			foreach($attributes as $name=>$value)
-			{
-				if(property_exists($record,$name))
-					$record->$name=$value;
-				else if(isset($record->_md->columns[$name]))
-					$record->_attributes[$name]=$value;
-			}
-			$record->attachBehaviors($record->behaviors());
-			if($callAfterFind)
-				$record->afterFind();
-			return $record;
-		}
-		else
-			return null;
-	}
-
-	/**
-	 * Creates a list of active records based on the input data.
-	 * This method is internally used by the find methods.
-	 * @param array list of attribute values for the active records.
-	 * @param boolean whether to call {@link afterFind} after each record is populated.
-	 * This parameter is added in version 1.0.3.
-	 * @return array list of active records.
-	 */
-	public function populateRecords($data,$callAfterFind=true)
-	{
-		$records=array();
-		$md=$this->getMetaData();
-		$table=$md->tableSchema;
-		foreach($data as $attributes)
-		{
-			$record=$this->instantiate($attributes);
-			$record->_md=$md;
-			foreach($attributes as $name=>$value)
-			{
-				if(property_exists($record,$name))
-					$record->$name=$value;
-				else if(isset($record->_md->columns[$name]))
-					$record->_attributes[$name]=$value;
-			}
-			$record->attachBehaviors($record->behaviors());
-			if($callAfterFind)
-				$record->afterFind();
-			$records[]=$record;
-		}
-		return $records;
-	}
-
-	/**
-	 * Creates an active record instance.
-	 * This method is called by {@link populateRecord} and {@link populateRecords}.
-	 * You may override this method if the instance being created
-	 * depends the attributes that are to be populated to the record.
-	 * For example, by creating a record based on the value of a column,
-	 * you may implement the so-called single-table inheritance mapping.
-	 * @param array list of attribute values for the active records.
-	 * @return CActiveRecord the active record
-	 * @since 1.0.2
-	 */
-	protected function instantiate($attributes)
-	{
-		$class=get_class($this);
-		$model=new $class(null);
-		$model->setScenario('update');
-		return $model;
-	}
-
-	/**
-	 * Returns whether there is an element at the specified offset.
-	 * This method is required by the interface ArrayAccess.
-	 * @param mixed the offset to check on
-	 * @return boolean
-	 * @since 1.0.2
-	 */
-	public function offsetExists($offset)
-	{
-		return isset($this->getMetaData()->columns[$offset]);
-	}
-}
-
-
-/**
- * CBaseActiveRelation is the base class for all active relations.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0.4
- */
-class TBaseActiveRelation extends TComponent
-{
-	/**
-	 * @var string name of the related object
-	 */
-	public $name;
-	/**
-	 * @var string name of the related active record class
-	 */
-	public $className;
-	/**
-	 * @var string the foreign key in this relation
-	 */
-	public $foreignKey;
-	/**
-	 * @var mixed list of column names (an array, or a string of names separated by commas) to be selected.
-	 * Do not quote or prefix the column names unless they are used in an expression.
-	 * In that case, you should prefix the column names with '??.'.
-	 */
-	public $select='*';
-	/**
-	 * @var string WHERE clause. For {@link CActiveRelation} descendant classes, column names
-	 * referenced in the condition should be disambiguated with prefix '??.'.
-	 */
-	public $condition='';
-	/**
-	 * @var array the parameters that are to be bound to the condition.
-	 * The keys are parameter placeholder names, and the values are parameter values.
-	 */
-	public $params=array();
-	/**
-	 * @var string GROUP BY clause. For {@link CActiveRelation} descendant classes, column names
-	 * referenced in this property should be disambiguated with prefix '??.'.
-	 */
-	public $group='';
-	/**
-	 * @var string HAVING clause. For {@link CActiveRelation} descendant classes, column names
-	 * referenced in this property should be disambiguated with prefix '??.'.
-	 */
-	public $having='';
-	/**
-	 * @var string ORDER BY clause. For {@link CActiveRelation} descendant classes, column names
-	 * referenced in this property should be disambiguated with prefix '??.'.
-	 */
-	public $order='';
-
-	/**
-	 * Constructor.
-	 * @param string name of the relation
-	 * @param string name of the related active record class
-	 * @param string foreign key for this relation
-	 * @param array additional options (name=>value). The keys must be the property names of this class.
-	 */
-	public function __construct($name,$className,$foreignKey,$options=array())
-	{
-		$this->name=$name;
-		$this->className=$className;
-		$this->foreignKey=$foreignKey;
-		foreach($options as $name=>$value)
-			$this->$name=$value;
-	}
-
-	/**
-	 * Merges this relation with a criteria specified dynamically.
-	 * @param array the dynamically specified criteria
-	 * @since 1.0.5
-	 */
-	public function mergeWith($criteria)
-	{
-		if(isset($criteria['select']) && $this->select!==$criteria['select'])
-		{
-			if($this->select==='*')
-				$this->select=$criteria['select'];
-			else if($criteria['select']!=='*')
-			{
-				$select1=is_string($this->select)?preg_split('/\s*,\s*/',trim($this->select),-1,PREG_SPLIT_NO_EMPTY):$this->select;
-				$select2=is_string($criteria['select'])?preg_split('/\s*,\s*/',trim($criteria['select']),-1,PREG_SPLIT_NO_EMPTY):$criteria['select'];
-				$this->select=array_merge($select1,array_diff($select2,$select1));
-			}
-		}
-
-		if(isset($criteria['condition']) && $this->condition!==$criteria['condition'])
-		{
-			if($this->condition==='')
-				$this->condition=$criteria['condition'];
-			else if($criteria['condition']!=='')
-				$this->condition="({$this->condition}) AND ({$criteria['condition']})";
-		}
-
-		if(isset($criteria['params']) && $this->params!==$criteria['params'])
-			$this->params=array_merge($this->params,$criteria['params']);
-
-		if(isset($criteria['order']) && $this->order!==$criteria['order'])
-		{
-			if($this->order==='')
-				$this->order=$criteria['order'];
-			else if($criteria['order']!=='')
-				$this->order.=', '.$criteria['order'];
-		}
-
-		if(isset($criteria['group']) && $this->group!==$criteria['group'])
-		{
-			if($this->group==='')
-				$this->group=$criteria['group'];
-			else if($criteria['group']!=='')
-				$this->group.=', '.$criteria['group'];
-		}
-
-		if(isset($criteria['having']) && $this->having!==$criteria['having'])
-		{
-			if($this->having==='')
-				$this->having=$criteria['having'];
-			else if($criteria['having']!=='')
-				$this->having="({$this->having}) AND ({$criteria['having']})";
-		}
-	}
-}
-
-
-/**
- * CStatRelation represents a statistical relational query.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0.4
- */
-class TStatRelation extends TBaseActiveRelation
-{
-	/**
-	 * @var string the statistical expression. Defaults to 'COUNT(*)', meaning
-	 * the count of child objects.
-	 */
-	public $select='COUNT(*)';
-	/**
-	 * @var mixed the default value to be assigned to those records that do not
-	 * receive a statistical query result. Defaults to 0.
-	 */
-	public $defaultValue=0;
-
-	/**
-	 * Merges this relation with a criteria specified dynamically.
-	 * @param array the dynamically specified criteria
-	 * @since 1.0.5
-	 */
-	public function mergeWith($criteria)
-	{
-		parent::mergeWith($criteria);
-
-		if(isset($criteria['defaultValue']))
-			$this->defaultValue=$criteria['defaultValue'];
-	}
-}
-
-
-/**
- * CActiveRelation is the base class for representing active relations that bring back related objects.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TActiveRelation extends TBaseActiveRelation
-{
-	/**
-	 * @var string join type. Defaults to 'LEFT OUTER JOIN'.
-	 */
-	public $joinType='LEFT OUTER JOIN';
-	/**
-	 * @var string ON clause. The condition specified here will be appended to the joining condition using AND operator.
-	 * @since 1.0.2
-	 */
-	public $on='';
-	/**
-	 * @var string the alias for the table that this relation refers to. Defaults to null, meaning
-	 * the alias will be the same as the relation name.
-	 * @since 1.0.1
-	 */
-	public $alias;
-	/**
-	 * @var string|array specifies which related objects should be eagerly loaded when this related object is lazily loaded.
-	 * For more details about this property, see {@link CActiveRecord::with()}.
-	 */
-	public $with=array();
-
-	/**
-	 * Merges this relation with a criteria specified dynamically.
-	 * @param array the dynamically specified criteria
-	 * @since 1.0.5
-	 */
-	public function mergeWith($criteria)
-	{
-		if(isset($criteria['condition']) && $this->on!==$criteria['condition'])
-		{
-			if($this->on==='')
-				$this->on=$criteria['condition'];
-			else if($criteria['condition']!=='')
-				$this->on="({$this->on}) AND ({$criteria['condition']})";
-		}
-		unset($criteria['condition']);
-
-		parent::mergeWith($criteria);
-
-		if(isset($criteria['joinType']))
-			$this->joinType=$criteria['joinType'];
-
-		if(isset($criteria['on']) && $this->on!==$criteria['on'])
-		{
-			if($this->on==='')
-				$this->on=$criteria['on'];
-			else if($criteria['on']!=='')
-				$this->on="({$this->on}) AND ({$criteria['on']})";
-		}
-
-		if(isset($criteria['with']))
-			$this->with=$criteria['with'];
-
-		if(isset($criteria['alias']))
-			$this->alias=$criteria['alias'];
-
-		if(isset($criteria['together']))
-			$this->together=$criteria['together'];
-	}
-}
-
-
-/**
- * CBelongsToRelation represents the parameters specifying a BELONGS_TO relation.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TBelongsToRelation extends TActiveRelation
-{
-}
-
-
-/**
- * CHasOneRelation represents the parameters specifying a HAS_ONE relation.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class THasOneRelation extends TActiveRelation
-{
-}
-
-
-/**
- * CHasManyRelation represents the parameters specifying a HAS_MANY relation.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class THasManyRelation extends TActiveRelation
-{
-	/**
-	 * @var integer limit of the rows to be selected. It is effective only for lazy loading this related object. Defaults to -1, meaning no limit.
-	 */
-	public $limit=-1;
-	/**
-	 * @var integer offset of the rows to be selected. It is effective only for lazy loading this related object. Defaults to -1, meaning no offset.
-	 */
-	public $offset=-1;
-	/**
-	 * @var boolean whether this table should be joined with the primary table.
-	 * When setting this property to be false, the table associated with this relation will
-	 * appear in a separate JOIN statement. Defaults to true, meaning the table will be joined
-	 * together with the primary table. Note that in version 1.0.x, the default value of this property was false.
-	 */
-	public $together=true;
-
-	/**
-	 * Merges this relation with a criteria specified dynamically.
-	 * @param array the dynamically specified criteria
-	 * @since 1.0.5
-	 */
-	public function mergeWith($criteria)
-	{
-		parent::mergeWith($criteria);
-		if(isset($criteria['limit']) && $criteria['limit']>0)
-			$this->limit=$criteria['limit'];
-
-		if(isset($criteria['offset']) && $criteria['offset']>=0)
-			$this->offset=$criteria['offset'];
-	}
-}
-
-
-/**
- * CManyManyRelation represents the parameters specifying a MANY_MANY relation.
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TManyManyRelation extends THasManyRelation
-{
-}
-
-
-/**
- * CActiveRecordMetaData represents the meta-data for an Active Record class.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecord.php 1127 2009-06-13 20:26:35Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0
- */
-class TActiveRecordMetaData
-{
-	/**
-	 * @var CDbTableSchema the table schema information
-	 */
-	public $tableSchema;
-	/**
-	 * @var array table columns
-	 */
-	public $columns;
-	/**
-	 * @var array list of relations
-	 */
-	public $relations=array();
-	/**
-	 * @var array attribute default values
-	 */
-	public $attributeDefaults=array();
-
-	private $_model;
-
-	/**
-	 * Constructor.
-	 * @param CActiveRecord the model instance
-	 */
-	public function __construct($model)
-	{
-		$this->_model=$model;
-
-		$tableName=$model->tableName();
-		if(($table=$model->getDbConnection()->getSchema()->getTable($tableName))===null)
-			throw new TDbException('The table "'.$tableName.'" for active record class "'.get_class($model).'" cannot be found in the database.');
-			
-		if($table->primaryKey===null)
-			$table->primaryKey=$model->primaryKey();
-		$this->tableSchema=$table;
-		$this->columns=$table->columns;
-
-		foreach($table->columns as $name=>$column)
-		{
-			if(!$column->isPrimaryKey && $column->defaultValue!==null)
-				$this->attributeDefaults[$name]=$column->defaultValue;
-		}
-
-		foreach($model->relations() as $name=>$config)
-		{
-			if(isset($config[0],$config[1],$config[2]))  // relation class, AR class, FK
-				$this->relations[$name]=new $config[0]($name,$config[1],$config[2],array_slice($config,3));
-			else
-				throw new TDbException('Active record "'.get_class($model).'" has an invalid configuration for relation "'.$name.'". It must specify the relation type, the related active record class and the foreign key.');
-		}
-	}
-}
-
-/**
- * TActiveRecordInvalidFinderResult class.
- * TActiveRecordInvalidFinderResult defines the enumerable type for possible results
- * if an invalid {@link TActiveRecord::__call magic-finder} invoked.
- *
- * The following enumerable values are defined:
- * - Null: return null (default)
- * - Exception: throws a TActiveRecordException
- *
- * @author Yves Berkholz <godzilla80@gmx.net>
- * @version $Id: TActiveRecord.php 2649 2009-05-11 07:44:55Z godzilla80@gmx.net $
- * @package System.Data.ActiveRecord
- * @see TActiveRecordManager::setInvalidFinderResult
- * @see TActiveRecordConfig::setInvalidFinderResult
- * @see TActiveRecord::setInvalidFinderResult
- * @since 3.1.5
- */
-class TActiveRecordInvalidFinderResult extends TEnumerable
-{
-	const Null = 'Null';
-	const Exception = 'Exception';
-}
diff --git a/framework/Db/ActiveRecord/TActiveRecordBehavior.php b/framework/Db/ActiveRecord/TActiveRecordBehavior.php
deleted file mode 100644
index 1e4ccbae..00000000
--- a/framework/Db/ActiveRecord/TActiveRecordBehavior.php
+++ /dev/null
@@ -1,94 +0,0 @@
-<?php
-/**
- * CActiveRecordBehavior class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * CActiveRecordBehavior is the base class for behaviors that can be attached to {@link CActiveRecord}.
- * Compared with {@link CModelBehavior}, CActiveRecordBehavior attaches to more events
- * that are only defined by {@link CActiveRecord}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: CActiveRecordBehavior.php 564 2009-01-21 22:07:10Z qiang.xue $
- * @package System.Db.ActiveRecord
- * @since 1.0.2
- */
-class TActiveRecordBehavior extends TModelBehavior
-{
-	/**
-	 * Declares events and the corresponding event handler methods.
-	 * If you override this method, make sure you merge the parent result to the return value.
-	 * @return array events (array keys) and the corresponding event handler methods (array values).
-	 * @see CBehavior::events
-	 */
-	public function events()
-	{
-		return array_merge(parent::events(), array(
-			'onBeforeSave'=>'beforeSave',
-			'onAfterSave'=>'afterSave',
-			'onBeforeDelete'=>'beforeDelete',
-			'onAfterDelete'=>'afterDelete',
-			'onAfterConstruct'=>'afterConstruct',
-			'onAfterFind'=>'afterFind',
-		));
-	}
-
-	/**
-	 * Responds to {@link CActiveRecord::onBeforeSave} event.
-	 * Overrides this method if you want to handle the corresponding event of the {@link CBehavior::owner owner}.
-	 * @param CEvent event parameter
-	 */
-	public function beforeSave($event)
-	{
-	}
-
-	/**
-	 * Responds to {@link CActiveRecord::onAfterSave} event.
-	 * Overrides this method if you want to handle the corresponding event of the {@link CBehavior::owner owner}.
-	 * @param CEvent event parameter
-	 */
-	public function afterSave($event)
-	{
-	}
-
-	/**
-	 * Responds to {@link CActiveRecord::onBeforeDelete} event.
-	 * Overrides this method if you want to handle the corresponding event of the {@link CBehavior::owner owner}.
-	 * @param CEvent event parameter
-	 */
-	public function beforeDelete($event)
-	{
-	}
-
-	/**
-	 * Responds to {@link CActiveRecord::onAfterDelete} event.
-	 * Overrides this method if you want to handle the corresponding event of the {@link CBehavior::owner owner}.
-	 * @param CEvent event parameter
-	 */
-	public function afterDelete($event)
-	{
-	}
-
-	/**
-	 * Responds to {@link CActiveRecord::onAfterConstruct} event.
-	 * Overrides this method if you want to handle the corresponding event of the {@link CBehavior::owner owner}.
-	 * @param CEvent event parameter
-	 */
-	public function afterConstruct($event)
-	{
-	}
-
-	/**
-	 * Responds to {@link CActiveRecord::onAfterFind} event.
-	 * Overrides this method if you want to handle the corresponding event of the {@link CBehavior::owner owner}.
-	 * @param CEvent event parameter
-	 */
-	public function afterFind($event)
-	{
-	}
-}
diff --git a/framework/Db/ActiveRecord/TActiveRecordCriteria.php b/framework/Db/ActiveRecord/TActiveRecordCriteria.php
deleted file mode 100644
index 9dded69a..00000000
--- a/framework/Db/ActiveRecord/TActiveRecordCriteria.php
+++ /dev/null
@@ -1,254 +0,0 @@
-<?php
-/**
- * TActiveRecordCriteria class file
- * Adapts *deprecated* Prado TActiveRecordCriteria to TDbCriteria (Yii)
- * @class TActiveRecordCriteria
- * @deprecated
- * @author Daniel Mueller <tux@penguinfriends.org>
- */
-
-Prado::using('System.Db.Schema.TDbCriteria');
-
-class TSqlCriteria extends TDbCriteria
-{
-	
-	private $_TDbCriteria = null;
-
-	public function __construct($condition=null, $parameters=array())
-	{
-		if(!is_array($parameters) && func_num_args() > 1)
-			$parameters = array_slice(func_get_args(), 1);
-
-		$this->_TDbCriteria = $this;
-		
-		$this->_TDbCriteria->params = new ArrayObject();
-
-		$param = array(
-			'condition' => ($condition !== null) ? $condition : '',
-			'params' => $parameters
-		);
-	}
-
-	public function getCondition()
-	{
-		return $this->_TDbCriteria->condition;
-	}
-
-	public function setCondition($value)
-	{
-		if(empty($value))
-			return;
-
-		// supporting the following SELECT-syntax:
-		// [ORDER BY {col_name | expr | position}
-		//      [ASC | DESC], ...]
-		//    [LIMIT {[offset,] row_count | row_count OFFSET offset}]
-		// See: http://dev.mysql.com/doc/refman/5.0/en/select.html
-				
-				
-		if(preg_match('/ORDER\s+BY\s+(.*?)(?=LIMIT)|ORDER\s+BY\s+(.*?)$/i', $value, $matches) > 0) {
-			// condition contains ORDER BY
-			$value = str_replace($matches[0], '', $value);
-			if(strlen($matches[1]) > 0) {
-				$this->_TDbCriteria->setOrdersBy($matches[1]);
-			} else if(strlen($matches[2]) > 0) {
-				$this->setOrdersBy($matches[2]);
-			}
-		}
-			
-		if(preg_match('/LIMIT\s+([\d\s,]+)/i', $value, $matches) > 0) {
-				// condition contains limit
-			$value = str_replace($matches[0], '', $value); 
-			// remove limit from query
-			if(strpos($matches[1], ',')) { // both offset and limit given
-				list($offset, $limit) = explode(',', $matches[1]);
-				$this->_TDbCriteria->limit = (int)$limit;
-				$this->_TDbCriteria->offset = (int)$offset;
-			} else { // only limit given
-				$this->_TDbCriteria->limit = (int)$matches[1];
-			}
-		}
-
-		if(preg_match('/OFFSET\s+(\d+)/i', $value, $matches) > 0) {
-			// condition contains offset
-			$value = str_replace($matches[0], '', $value); 
-			// remove offset from query
-			$this->_TDbCriteria->offset = (int)$matches[1]; // set offset in criteria
-		}
-		
-		$this->_TDbCriteria->condition = trim($value);
-	}
-
-	public function getParameters()
-	{
-		return $this->_TDbCriteria->params;
-	}
-
-	public function setParameters($value)
-	{
-		if(is_array($value))
-		{
-			$this->_TDbCriteria->params = $value;
-		}
-		elseif ($value instanceof ArrayAccess)
-		{
-			$this->_TDbCriteria->params = (array)$value;
-		}
-		else
-			throw new TException('Value must be an array or of type ArrayAccess.');
-	}
-
-	public function getIsNamedParameters()
-	{
-		foreach($this->_TDbCriteria->params as $key=>$val)
-			return is_string($key);
-	}
-
-	public function getLimit()
-	{
-		return ($this->_TDbCriteria->limit != -1) ? $this->_TDbCriteria->limit : null;
-	}
-
-	public function setLimit($value)
-	{
-		$this->_TDbCriteria->limit = (int)$value;
-	}
-
-	public function getOffset()
-	{
-		return ($this->_TDbCriteria->offset != -1) ? $this->_TDbCriteria->offset : null;
-	}
-
-	public function setOffset($value)
-	{
-		$this->_TDbCriteria->offset = (int)$value;
-	}
-	
-	public function getOrdersBy()
-	{
-		if(empty($this->_TDbCriteria->order))
-			return array();
-
-		$value=trim(preg_replace('/\s+/',' ', $this->_TDbCriteria->order));
-		$orderBys=array();
-		foreach(explode(',',$value) as $orderBy)
-		{
-			$vs=explode(' ',trim($orderBy));
-			
-		$orderBys[$vs[0]]=isset($vs[1])?$vs[1]:'asc';
-		}
-		return $orderBys;
-	}
-
-	public function setOrdersBy($value)
-	{
-		if(is_string($value))
-			$this->TDbCriteria->order = $value;
-		elseif (is_array($value) || $value instanceof Traversable)
-		{
-			$str = '';
-			foreach($value as $key => $val)
-				$str .= (($str != '') ? ', ': '').$key.' '.$val;
-			
-			$this->_TDbCriteria->order = $str;
-		}
-	}	
-
-	public function __toString()
-	{
-		$str = '';
-		if(strlen((string)$this->getCondition()) > 0)
-			$str .= '"'.(string)$this->getCondition().'"';
-		$params = array();
-		foreach($this->getParameters() as $k=>$v)
-			$params[] = "{$k} => ${v}";
-		if(count($params) > 0)
-			$str .= ', "'.implode(', ',$params).'"';
-		$orders = array();
-		foreach($this->getOrdersBy() as $k=>$v)
-			$orders[] = "{$k} => ${v}";
-		if(count($orders) > 0)
-			$str .= ', "'.implode(', ',$orders).'"';
-		if($this->getLimit() !==null)
-			$str .= ', '.$this->_limit;
-		if($this->getOffset() !== null)
-			$str .= ', '.$this->_offset;
-		return $str;
-	}
-
-	/**
-	 * Returns a property value or an event handler list by property or event name.
-	 * Do not call this method. This is a PHP magic method that we override
-	 * to allow using the following syntax to read a property:
-	 * <code>
-	 * $value=$component->PropertyName;
-	 * </code>
-	 * and to obtain the event handler list for an event,
-	 * <code>
-	 * $eventHandlerList=$component->EventName;
-	 * </code>
-	 * @param string the property name or the event name
-	 * @return mixed the property value or the event handler list
-	 * @throws TInvalidOperationException if the property/event is not defined.
-	 */
-	public function __get($name)
-	{
-		$getter='get'.$name;
-		if(method_exists($this,$getter))
-		{
-			// getting a property
-			return $this->$getter();
-		}
-		else if(strncasecmp($name,'on',2)===0 && method_exists($this,$name))
-		{
-			// getting an event (handler list)
-			$name=strtolower($name);
-			if(!isset($this->_e[$name]))
-				$this->_e[$name]=new TList;
-			return $this->_e[$name];
-		}
-		else
-		{
-			throw new TInvalidOperationException('component_property_undefined',get_class($this),$name);
-		}
-	}
-
-	/**
-	 * Sets value of a component property.
-	 * Do not call this method. This is a PHP magic method that we override
-	 * to allow using the following syntax to set a property or attach an event handler.
-	 * <code>
-	 * $this->PropertyName=$value;
-	 * $this->EventName=$handler;
-	 * </code>
-	 * @param string the property name or event name
-	 * @param mixed the property value or event handler
-	 * @throws TInvalidOperationException If the property is not defined or read-only.
-	 */
-	public function __set($name,$value)
-	{
-		$setter='set'.$name;
-		if(method_exists($this,$setter))
-		{
-			$this->$setter($value);
-		}
-		else if(strncasecmp($name,'on',2)===0 && method_exists($this,$name))
-		{
-			$this->attachEventHandler($name,$value);
-		}
-		else if(method_exists($this,'get'.$name))
-		{
-			throw new TInvalidOperationException('component_property_readonly',get_class($this),$name);
-		}
-		else
-		{
-			throw new TInvalidOperationException('component_property_undefined',get_class($this),$name);
-		}
-	}
-
-}
-
-class TActiveRecordCriteria extends TSqlCriteria
-{
-	
-}
diff --git a/framework/Db/Schema/TDbColumnSchema.php b/framework/Db/Schema/TDbColumnSchema.php
deleted file mode 100755
index f2c4faaa..00000000
--- a/framework/Db/Schema/TDbColumnSchema.php
+++ /dev/null
@@ -1,145 +0,0 @@
-<?php
-/**
- * TDbColumnSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbExpression');
-
-/**
- * TDbColumnSchema class describes the column meta data of a database table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TDbColumnSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema
- * @since 1.0
- */
-class TDbColumnSchema extends TComponent
-{
-	/**
-	 * @var string name of this column (without quotes).
-	 */
-	public $name;
-	/**
-	 * @var string raw name of this column. This is the quoted name that can be used in SQL queries.
-	 */
-	public $rawName;
-	/**
-	 * @var boolean whether this column can be null.
-	 */
-	public $allowNull;
-	/**
-	 * @var string the DB type of this column.
-	 */
-	public $dbType;
-	/**
-	 * @var string the PHP type of this column.
-	 */
-	public $type;
-	/**
-	 * @var mixed default value of this column
-	 */
-	public $defaultValue;
-	/**
-	 * @var integer size of the column.
-	 */
-	public $size;
-	/**
-	 * @var integer precision of the column data, if it is numeric.
-	 */
-	public $precision;
-	/**
-	 * @var integer scale of the column data, if it is numeric.
-	 */
-	public $scale;
-	/**
-	 * @var boolean whether this column is a primary key
-	 */
-	public $isPrimaryKey;
-	/**
-	 * @var boolean whether this column is a foreign key
-	 */
-	public $isForeignKey;
-
-
-	/**
-	 * Initializes the column with its DB type and default value.
-	 * This sets up the column's PHP type, size, precision, scale as well as default value.
-	 * @param string the column's DB type
-	 * @param mixed the default value
-	 */
-	public function init($dbType, $defaultValue)
-	{
-		$this->dbType=$dbType;
-		$this->extractType($dbType);
-		$this->extractLimit($dbType);
-		if($defaultValue!==null)
-			$this->extractDefault($defaultValue);
-	}
-
-	/**
-	 * Extracts the PHP type from DB type.
-	 * @param string DB type
-	 */
-	protected function extractType($dbType)
-	{
-		if(stripos($dbType,'int')!==false)
-			$this->type='integer';
-		else if(stripos($dbType,'bool')!==false)
-			$this->type='boolean';
-		else if(preg_match('/(real|floa|doub)/i',$dbType))
-			$this->type='double';
-		else
-			$this->type='string';
-	}
-
-	/**
-	 * Extracts size, precision and scale information from column's DB type.
-	 * @param string the column's DB type
-	 */
-	protected function extractLimit($dbType)
-	{
-		if(strpos($dbType,'(') && preg_match('/\((.*)\)/',$dbType,$matches))
-		{
-			$values=explode(',',$matches[1]);
-			$this->size=$this->precision=(int)$values[0];
-			if(isset($values[1]))
-				$this->scale=(int)$values[1];
-		}
-	}
-
-	/**
-	 * Extracts the default value for the column.
-	 * The value is typecasted to correct PHP type.
-	 * @param mixed the default value obtained from metadata
-	 */
-	protected function extractDefault($defaultValue)
-	{
-		$this->defaultValue=$this->typecast($defaultValue);
-	}
-
-	/**
-	 * Converts the input value to the type that this column is of.
-	 * @param mixed input value
-	 * @return mixed converted value
-	 */
-	public function typecast($value)
-	{
-		if(gettype($value)===$this->type || $value===null || $value instanceof TDbExpression)
-			return $value;
-		if($value==='')
-			return $this->type==='string' ? '' : null;
-		switch($this->type)
-		{
-			case 'integer': return (integer)$value;
-			case 'boolean': return (boolean)$value;
-			case 'double': return (double)$value;
-			case 'string': return (string)$value;
-			default: return $value;
-		}
-	}
-}
diff --git a/framework/Db/Schema/TDbCommandBuilder.php b/framework/Db/Schema/TDbCommandBuilder.php
deleted file mode 100755
index 7c25888d..00000000
--- a/framework/Db/Schema/TDbCommandBuilder.php
+++ /dev/null
@@ -1,656 +0,0 @@
-<?php
-/**
- * TDbCommandBuilder class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbSchema');
-prado::using('System.Db.Schema.TDbCriteria');
-
-/**
- * TDbCommandBuilder provides basic methods to create query commands for tables.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TDbCommandBuilder.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema
- * @since 1.0
- */
-class TDbCommandBuilder extends TComponent
-{
-	const PARAM_PREFIX=':yp';
-
-	private $_schema;
-	private $_connection;
-
-	/**
-	 * @param TDbSchema the schema for this command builder
-	 */
-	public function __construct($schema)
-	{
-		$this->_schema=$schema;
-		$this->_connection=$schema->getDbConnection();
-	}
-
-	/**
-	 * @return TDbConnection database connection.
-	 */
-	public function getDbConnection()
-	{
-		return $this->_connection;
-	}
-
-	/**
-	 * @return TDbSchema the schema for this command builder.
-	 */
-	public function getSchema()
-	{
-		return $this->_schema;
-	}
-
-	/**
-	 * Returns the last insertion ID for the specified table.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @return mixed last insertion id. Null is returned if no sequence name.
-	 */
-	public function getLastInsertID($table)
-	{
-		$this->ensureTable($table);
-		if($table->sequenceName!==null)
-			return $this->_connection->getLastInsertID($table->sequenceName);
-		else
-			return null;
-	}
-
-	/**
-	 * Creates a SELECT command for a single table.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand query command.
-	 */
-	public function createFindCommand($table,$criteria)
-	{
-		$this->ensureTable($table);
-		$select=is_array($criteria->select) ? implode(', ',$criteria->select) : $criteria->select;
-		$sql="SELECT {$select} FROM {$table->rawName}";
-		$sql=$this->applyJoin($sql,$criteria->join);
-		$sql=$this->applyCondition($sql,$criteria->condition);
-		$sql=$this->applyGroup($sql,$criteria->group);
-		$sql=$this->applyHaving($sql,$criteria->having);
-		$sql=$this->applyOrder($sql,$criteria->order);
-		$sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
-		$command=$this->_connection->createCommand($sql);
-		$this->bindValues($command,$criteria->params);
-		return $command;
-	}
-
-	/**
-	 * Creates a COUNT(*) command for a single table.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand query command.
-	 */
-	public function createCountCommand($table,$criteria)
-	{
-		$this->ensureTable($table);
-		$criteria->select='COUNT(*)';
-		return $this->createFindCommand($table,$criteria);
-	}
-
-	/**
-	 * Creates a DELETE command.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand delete command.
-	 */
-	public function createDeleteCommand($table,$criteria)
-	{
-		$this->ensureTable($table);
-		$sql="DELETE FROM {$table->rawName}";
-		$sql=$this->applyJoin($sql,$criteria->join);
-		$sql=$this->applyCondition($sql,$criteria->condition);
-		$sql=$this->applyGroup($sql,$criteria->group);
-		$sql=$this->applyHaving($sql,$criteria->having);
-		$sql=$this->applyOrder($sql,$criteria->order);
-		$sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
-		$command=$this->_connection->createCommand($sql);
-		$this->bindValues($command,$criteria->params);
-		return $command;
-	}
-
-	/**
-	 * Creates an INSERT command.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param array data to be inserted (column name=>column value). If a key is not a valid column name, the corresponding value will be ignored.
-	 * @return TDbCommand insert command
-	 */
-	public function createInsertCommand($table,$data)
-	{
-		$this->ensureTable($table);
-		$fields=array();
-		$values=array();
-		$placeholders=array();
-		$i=0;
-		foreach($data as $name=>$value)
-		{
-			if(($column=$table->getColumn($name))!==null && ($value!==null || $column->allowNull))
-			{
-				$fields[]=$column->rawName;
-				if($value instanceof TDbExpression)
-					$placeholders[]=(string)$value;
-				else
-				{
-					$placeholders[]=self::PARAM_PREFIX.$i;
-					$values[self::PARAM_PREFIX.$i]=$column->typecast($value);
-					$i++;
-				}
-			}
-		}
-		$sql="INSERT INTO {$table->rawName} (".implode(', ',$fields).') VALUES ('.implode(', ',$placeholders).')';
-		$command=$this->_connection->createCommand($sql);
-
-		foreach($values as $name=>$value)
-			$command->bindValue($name,$value);
-
-		return $command;
-	}
-
-	/**
-	 * Creates an UPDATE command.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param array list of columns to be updated (name=>value)
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand update command.
-	 */
-	public function createUpdateCommand($table,$data,$criteria)
-	{
-		$this->ensureTable($table);
-		$fields=array();
-		$values=array();
-		$bindByPosition=isset($criteria->params[0]);
-		$i=0;
-		foreach($data as $name=>$value)
-		{
-			if(($column=$table->getColumn($name))!==null)
-			{
-				if($value instanceof TDbExpression)
-					$fields[]=$column->rawName.'='.(string)$value;
-				else if($bindByPosition)
-				{
-					$fields[]=$column->rawName.'=?';
-					$values[]=$column->typecast($value);
-				}
-				else
-				{
-					$fields[]=$column->rawName.'='.self::PARAM_PREFIX.$i;
-					$values[self::PARAM_PREFIX.$i]=$column->typecast($value);
-					$i++;
-				}
-			}
-		}
-		if($fields===array())
-			throw new TDbException('No columns are being updated for table "{0}".',
-				$table->name);
-		$sql="UPDATE {$table->rawName} SET ".implode(', ',$fields);
-		$sql=$this->applyJoin($sql,$criteria->join);
-		$sql=$this->applyCondition($sql,$criteria->condition);
-		$sql=$this->applyOrder($sql,$criteria->order);
-		$sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
-
-		$command=$this->_connection->createCommand($sql);
-		$this->bindValues($command,array_merge($values,$criteria->params));
-
-		return $command;
-	}
-
-	/**
-	 * Creates an UPDATE command that increments/decrements certain columns.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param TDbCriteria the query criteria
-	 * @param array counters to be updated (counter increments/decrements indexed by column names.)
-	 * @return TDbCommand the created command
-	 * @throws CException if no counter is specified
-	 */
-	public function createUpdateCounterCommand($table,$counters,$criteria)
-	{
-		$this->ensureTable($table);
-		$fields=array();
-		foreach($counters as $name=>$value)
-		{
-			if(($column=$table->getColumn($name))!==null)
-			{
-				$value=(int)$value;
-				if($value<0)
-					$fields[]="{$column->rawName}={$column->rawName}-".(-$value);
-				else
-					$fields[]="{$column->rawName}={$column->rawName}+".$value;
-			}
-		}
-		if($fields!==array())
-		{
-			$sql="UPDATE {$table->rawName} SET ".implode(', ',$fields);
-			$sql=$this->applyJoin($sql,$criteria->join);
-			$sql=$this->applyCondition($sql,$criteria->condition);
-			$sql=$this->applyOrder($sql,$criteria->order);
-			$sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
-			$command=$this->_connection->createCommand($sql);
-			$this->bindValues($command,$criteria->params);
-			return $command;
-		}
-		else
-			throw new TDbException('No counter columns are being updated for table "{0}".',
-				$table->name);
-	}
-
-	/**
-	 * Creates a command based on a given SQL statement.
-	 * @param string the explicitly specified SQL statement
-	 * @param array parameters that will be bound to the SQL statement
-	 * @return TDbCommand the created command
-	 */
-	public function createSqlCommand($sql,$params=array())
-	{
-		$command=$this->_connection->createCommand($sql);
-		$this->bindValues($command,$params);
-		return $command;
-	}
-
-	/**
-	 * Alters the SQL to apply JOIN clause.
-	 * @param string the SQL statement to be altered
-	 * @param string the JOIN clause (starting with join type, such as INNER JOIN)
-	 * @return string the altered SQL statement
-	 */
-	public function applyJoin($sql,$join)
-	{
-		if($join!=='')
-			return $sql.' '.$join;
-		else
-			return $sql;
-	}
-
-	/**
-	 * Alters the SQL to apply WHERE clause.
-	 * @param string the SQL statement without WHERE clause
-	 * @param string the WHERE clause (without WHERE keyword)
-	 * @return string the altered SQL statement
-	 */
-	public function applyCondition($sql,$condition)
-	{
-		if($condition!=='')
-			return $sql.' WHERE '.$condition;
-		else
-			return $sql;
-	}
-
-	/**
-	 * Alters the SQL to apply ORDER BY.
-	 * @param string SQL statement without ORDER BY.
-	 * @param string column ordering
-	 * @return string modified SQL applied with ORDER BY.
-	 */
-	public function applyOrder($sql,$orderBy)
-	{
-		if($orderBy!=='')
-			return $sql.' ORDER BY '.$orderBy;
-		else
-			return $sql;
-	}
-
-	/**
-	 * Alters the SQL to apply LIMIT and OFFSET.
-	 * Default implementation is applicable for PostgreSQL, MySQL and SQLite.
-	 * @param string SQL query string without LIMIT and OFFSET.
-	 * @param integer maximum number of rows, -1 to ignore limit.
-	 * @param integer row offset, -1 to ignore offset.
-	 * @return string SQL with LIMIT and OFFSET
-	 */
-	public function applyLimit($sql,$limit,$offset)
-	{
-		if($limit>=0)
-			$sql.=' LIMIT '.(int)$limit;
-		if($offset>0)
-			$sql.=' OFFSET '.(int)$offset;
-		return $sql;
-	}
-
-	/**
-	 * Alters the SQL to apply GROUP BY.
-	 * @param string SQL query string without GROUP BY.
-	 * @param string GROUP BY
-	 * @return string SQL with GROUP BY.
-	 */
-	public function applyGroup($sql,$group)
-	{
-		if($group!=='')
-			return $sql.' GROUP BY '.$group;
-		else
-			return $sql;
-	}
-
-	/**
-	 * Alters the SQL to apply HAVING.
-	 * @param string SQL query string without HAVING
-	 * @param string HAVING
-	 * @return string SQL with HAVING
-	 * @since 1.0.1
-	 */
-	public function applyHaving($sql,$having)
-	{
-		if($having!=='')
-			return $sql.' HAVING '.$having;
-		else
-			return $sql;
-	}
-
-	/**
-	 * Binds parameter values for an SQL command.
-	 * @param TDbCommand database command
-	 * @param array values for binding (integer-indexed array for question mark placeholders, string-indexed array for named placeholders)
-	 */
-	public function bindValues($command, $values)
-	{
-		if(($n=count($values))===0)
-			return;
-		if(isset($values[0])) // question mark placeholders
-		{
-			for($i=0;$i<$n;++$i)
-				$command->bindValue($i+1,$values[$i]);
-		}
-		else // named placeholders
-		{
-			foreach($values as $name=>$value)
-			{
-				if($name[0]!==':')
-					$name=':'.$name;
-				$command->bindValue($name,$value);
-			}
-		}
-	}
-
-	/**
-	 * Creates a query criteria.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param mixed query condition or criteria.
-	 * If a string, it is treated as query condition (the WHERE clause);
-	 * If an array, it is treated as the initial values for constructing a {@link TDbCriteria} object;
-	 * Otherwise, it should be an instance of {@link TDbCriteria}.
-	 * @param array parameters to be bound to an SQL statement.
-	 * This is only used when the first parameter is a string (query condition).
-	 * In other cases, please use {@link TDbCriteria::params} to set parameters.
-	 * @return TDbCriteria the created query criteria
-	 * @throws CException if the condition is not string, array and TDbCriteria
-	 */
-	public function createCriteria($condition='',$params=array())
-	{
-		if(is_array($condition))
-			$criteria=new TDbCriteria($condition);
-		else if($condition instanceof TDbCriteria)
-			$criteria=clone $condition;
-		else
-		{
-			$criteria=new TDbCriteria;
-			$criteria->condition=$condition;
-			$criteria->params=$params;
-		}
-		return $criteria;
-	}
-
-	/**
-	 * Creates a query criteria with the specified primary key.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param mixed primary key value(s). Use array for multiple primary keys. For composite key, each key value must be an array (column name=>column value).
-	 * @param mixed query condition or criteria.
-	 * If a string, it is treated as query condition;
-	 * If an array, it is treated as the initial values for constructing a {@link TDbCriteria};
-	 * Otherwise, it should be an instance of {@link TDbCriteria}.
-	 * @param array parameters to be bound to an SQL statement.
-	 * This is only used when the second parameter is a string (query condition).
-	 * In other cases, please use {@link TDbCriteria::params} to set parameters.
-	 * @return TDbCriteria the created query criteria
-	 */
-	public function createPkCriteria($table,$pk,$condition='',$params=array())
-	{
-		$this->ensureTable($table);
-		$criteria=$this->createCriteria($condition,$params);
-		if(!is_array($pk)) // single key
-			$pk=array($pk);
-		if(is_array($table->primaryKey) && !isset($pk[0]) && $pk!==array()) // single composite key
-			$pk=array($pk);
-		$condition=$this->createInCondition($table,$table->primaryKey,$pk);
-		if($criteria->condition!=='')
-			$criteria->condition=$condition.' AND ('.$criteria->condition.')';
-		else
-			$criteria->condition=$condition;
-
-		return $criteria;
-	}
-
-	/**
-	 * Generates the expression for selecting rows of specified primary key values.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param array list of primary key values to be selected within
-	 * @param string column prefix (ended with dot). If null, it will be the table name
-	 * @return string the expression for selection
-	 */
-	public function createPkCondition($table,$values,$prefix=null)
-	{
-		$this->ensureTable($table);
-		return $this->createInCondition($table,$table->primaryKey,$values,$prefix);
-	}
-
-	/**
-	 * Creates a query criteria with the specified column values.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param array column values that should be matched in the query (name=>value)
-	 * @param mixed query condition or criteria.
-	 * If a string, it is treated as query condition;
-	 * If an array, it is treated as the initial values for constructing a {@link TDbCriteria};
-	 * Otherwise, it should be an instance of {@link TDbCriteria}.
-	 * @param array parameters to be bound to an SQL statement.
-	 * This is only used when the second parameter is a string (query condition).
-	 * In other cases, please use {@link TDbCriteria::params} to set parameters.
-	 * @return TDbCriteria the created query criteria
-	 */
-	public function createColumnCriteria($table,$columns,$condition='',$params=array())
-	{
-		$this->ensureTable($table);
-		$criteria=$this->createCriteria($condition,$params);
-		$bindByPosition=isset($criteria->params[0]);
-		$conditions=array();
-		$values=array();
-		$i=0;
-		foreach($columns as $name=>$value)
-		{
-			if(($column=$table->getColumn($name))!==null)
-			{
-				if($value!==null)
-				{
-					if($bindByPosition)
-					{
-						$conditions[]=$table->rawName.'.'.$column->rawName.'=?';
-						$values[]=$value;
-					}
-					else
-					{
-						$conditions[]=$table->rawName.'.'.$column->rawName.'='.self::PARAM_PREFIX.$i;
-						$values[self::PARAM_PREFIX.$i]=$value;
-						$i++;
-					}
-				}
-				else
-					$conditions[]=$table->rawName.'.'.$column->rawName.' IS NULL';
-			}
-			else
-				throw new TDbException('Table "{0}" does not have a column named "{1}".',
-					$table->name,$name);
-		}
-		$criteria->params=array_merge($values,$criteria->params);
-		if(isset($conditions[0]))
-		{
-			if($criteria->condition!=='')
-				$criteria->condition=implode(' AND ',$conditions).' AND ('.$criteria->condition.')';
-			else
-				$criteria->condition=implode(' AND ',$conditions);
-		}
-		return $criteria;
-	}
-
-	/**
-	 * Generates the expression for searching the specified keywords within a list of columns.
-	 * The search expression is generated using the 'LIKE' SQL syntax.
-	 * Every word in the keywords must be present and appear in at least one of the columns.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param array list of column names for potential search condition.
-	 * @param mixed search keywords. This can be either a string with space-separated keywords or an array of keywords.
-	 * @param string optional column prefix (with dot at the end). If null, the table name will be used as the prefix.
-	 * @param boolean whether the search is case-sensitive. Defaults to true. This parameter
-	 * has been available since version 1.0.4.
-	 * @return string SQL search condition matching on a set of columns. An empty string is returned
-	 * if either the column array or the keywords are empty.
-	 */
-	public function createSearchCondition($table,$columns,$keywords,$prefix=null,$caseSensitive=true)
-	{
-		$this->ensureTable($table);
-		if(!is_array($keywords))
-			$keywords=preg_split('/\s+/u',$keywords,-1,PREG_SPLIT_NO_EMPTY);
-		if(empty($keywords))
-			return '';
-		if($prefix===null)
-			$prefix=$table->rawName.'.';
-		$conditions=array();
-		foreach($columns as $name)
-		{
-			if(($column=$table->getColumn($name))===null)
-				throw new TDbException('Table "{0}" does not have a column named "{0}".',
-					$table->name,$name);
-			$condition=array();
-			foreach($keywords as $keyword)
-			{
-				if($caseSensitive)
-					$condition[]=$prefix.$column->rawName.' LIKE '.$this->_connection->quoteValue('%'.$keyword.'%');
-				else
-					$condition[]='LOWER('.$prefix.$column->rawName.') LIKE LOWER('.$this->_connection->quoteValue('%'.$keyword.'%').')';
-			}
-			$conditions[]=implode(' AND ',$condition);
-		}
-		return '('.implode(' OR ',$conditions).')';
-	}
-
-	/**
-	 * Generates the expression for selecting rows of specified primary key values.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param mixed the column name(s). It can be either a string indicating a single column
-	 * or an array of column names. If the latter, it stands for a composite key.
-	 * @param array list of key values to be selected within
-	 * @param string column prefix (ended with dot). If null, it will be the table name
-	 * @return string the expression for selection
-	 * @since 1.0.4
-	 */
-	public function createInCondition($table,$columnName,$values,$prefix=null)
-	{
-		if(($n=count($values))<1)
-			return '0=1';
-
-		$this->ensureTable($table);
-
-		if($prefix===null)
-			$prefix=$table->rawName.'.';
-
-		$db=$this->_connection;
-
-		if(is_array($columnName) && count($columnName)===1)
-			$columnName=reset($columnName);
-
-		if(is_string($columnName)) // simple key
-		{
-			if(!isset($table->columns[$columnName]))
-				throw new TDbException('Table "{0}" does not have a column named "{1}".',
-				$table->name, $columnName);
-			$column=$table->columns[$columnName];
-
-			foreach($values as &$value)
-			{
-				$value=$column->typecast($value);
-				if(is_string($value))
-					$value=$db->quoteValue($value);
-			}
-			if($n===1)
-				return $prefix.$column->rawName.($values[0]===null?' IS NULL':'='.$values[0]);
-			else
-				return $prefix.$column->rawName.' IN ('.implode(', ',$values).')';
-		}
-		else if(is_array($columnName)) // composite key: $values=array(array('pk1'=>'v1','pk2'=>'v2'),array(...))
-		{
-			foreach($columnName as $name)
-			{
-				if(!isset($table->columns[$name]))
-					throw new TDbException('Table "{0}" does not have a column named "{1}".',
-					$table->name, $name);
-
-				for($i=0;$i<$n;++$i)
-				{
-					if(isset($values[$i][$name]))
-					{
-						$value=$table->columns[$name]->typecast($values[$i][$name]);
-						if(is_string($value))
-							$values[$i][$name]=$db->quoteValue($value);
-						else
-							$values[$i][$name]=$value;
-					}
-					else
-						throw new TDbException('The value for the column "{1}" is not supplied when querying the table "{0}".',
-							$table->name,$name);
-				}
-			}
-			if(count($values)===1)
-			{
-				$entries=array();
-				foreach($values[0] as $name=>$value)
-					$entries[]=$prefix.$table->columns[$name]->rawName.($value===null?' IS NULL':'='.$value);
-				return implode(' AND ',$entries);
-			}
-
-			return $this->createCompositeInCondition($table,$values,$prefix);
-		}
-		else
-			throw new TDbException('Column name must be either a string or an array.');
-	}
-
-	/**
-	 * Generates the expression for selecting rows with specified composite key values.
-	 * @param TDbTableSchema the table schema
-	 * @param array list of primary key values to be selected within
-	 * @param string column prefix (ended with dot)
-	 * @return string the expression for selection
-	 * @since 1.0.4
-	 */
-	protected function createCompositeInCondition($table,$values,$prefix)
-	{
-		$keyNames=array();
-		foreach(array_keys($values[0]) as $name)
-			$keyNames[]=$prefix.$table->columns[$name]->rawName;
-		$vs=array();
-		foreach($values as $value)
-			$vs[]='('.implode(', ',$value).')';
-		return '('.implode(', ',$keyNames).') IN ('.implode(', ',$vs).')';
-	}
-
-	/**
-	 * Checks if the parameter is a valid table schema.
-	 * If it is a string, the corresponding table schema will be retrieved.
-	 * @param mixed table schema ({@link TDbTableSchema}) or table name (string).
-	 * If this refers to a valid table name, this parameter will be returned with the corresponding table schema.
-	 * @throws TDbException if the table name is not valid
-	 * @since 1.0.4
-	 */
-	protected function ensureTable(&$table)
-	{
-		if(is_string($table) && ($table=$this->_schema->getTable($tableName=$table))===null)
-			throw new TDbException('Table "{0}" does not exist.',
-				$tableName);
-	}
-}
diff --git a/framework/Db/Schema/TDbCriteria.php b/framework/Db/Schema/TDbCriteria.php
deleted file mode 100755
index 3dab036a..00000000
--- a/framework/Db/Schema/TDbCriteria.php
+++ /dev/null
@@ -1,166 +0,0 @@
-<?php
-/**
- * TDbCriteria class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * TDbCriteria represents a query criteria, such as conditions, ordering by, limit/offset.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TDbCriteria.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package system.db.schema
- * @since 1.0
- */
-class TDbCriteria
-{
-	/**
-	 * @var mixed the columns being selected. This refers to the SELECT clause in an SQL
-	 * statement. The property can be either a string (column names separated by commas)
-	 * or an array of column names. Defaults to '*', meaning all columns.
-	 */
-	public $select='*';
-	/**
-	 * @var string query condition. This refers to the WHERE clause in an SQL statement.
-	 * For example, <code>age>31 AND team=1</code>.
-	 */
-	public $condition='';
-	/**
-	 * @var array list of query parameter values indexed by parameter placeholders.
-	 * For example, <code>array(':name'=>'Dan', ':age'=>31)</code>.
-	 */
-	public $params=array();
-	/**
-	 * @var integer maximum number of records to be returned. If less than 0, it means no limit.
-	 */
-	public $limit=-1;
-	/**
-	 * @var integer zero-based offset from where the records are to be returned. If less than 0, it means starting from the beginning.
-	 */
-	public $offset=-1;
-	/**
-	 * @var string how to sort the query results. This refers to the ORDER BY clause in an SQL statement.
-	 */
-	public $order='';
-	/**
-	 * @var string how to group the query results. This refers to the GROUP BY clause in an SQL statement.
-	 * For example, <code>'projectID, teamID'</code>.
-	 */
-	public $group='';
-	/**
-	 * @var string how to join with other tables. This refers to the JOIN clause in an SQL statement.
-	 * For example, <code>'LEFT JOIN users ON users.id=authorID'</code>.
-	 */
-	public $join='';
-	/**
-	 * @var string the condition to be applied with GROUP-BY clause.
-	 * For example, <code>'SUM(revenue)<50000'</code>.
-	 * @since 1.0.1
-	 */
-	public $having='';
-
-	/**
-	 * Constructor.
-	 * @param array criteria initial property values (indexed by property name)
-	 */
-	public function __construct($data=array())
-	{
-		foreach($data as $name=>$value)
-			$this->$name=$value;
-	}
-
-	/**
-	 * Merges with another criteria.
-	 * In general, the merging makes the resulting criteria more restrictive.
-	 * For example, if both criterias have conditions, they will be 'AND' together.
-	 * Also, the criteria passed as the parameter takes precedence in case
-	 * two options cannot be merged (e.g. LIMIT, OFFSET).
-	 * @param TDbCriteria the criteria to be merged with.
-	 * @param boolean whether to use 'AND' to merge condition and having options.
-	 * If false, 'OR' will be used instead. Defaults to 'AND'. This parameter has been
-	 * available since version 1.0.6.
-	 * @since 1.0.5
-	 */
-	public function mergeWith($criteria,$useAnd=true)
-	{
-		$and=$useAnd ? 'AND' : 'OR';
-		if(is_array($criteria))
-			$criteria=new self($criteria);
-		if($this->select!==$criteria->select)
-		{
-			if($this->select==='*')
-				$this->select=$criteria->select;
-			else if($criteria->select!=='*')
-			{
-				$select1=is_string($this->select)?preg_split('/\s*,\s*/',trim($this->select),-1,PREG_SPLIT_NO_EMPTY):$this->select;
-				$select2=is_string($criteria->select)?preg_split('/\s*,\s*/',trim($criteria->select),-1,PREG_SPLIT_NO_EMPTY):$criteria->select;
-				$this->select=array_merge($select1,array_diff($select2,$select1));
-			}
-		}
-
-		if($this->condition!==$criteria->condition)
-		{
-			if($this->condition==='')
-				$this->condition=$criteria->condition;
-			else if($criteria->condition!=='')
-				$this->condition="({$this->condition}) $and ({$criteria->condition})";
-		}
-
-		if($this->params!==$criteria->params)
-			$this->params=array_merge($this->params,$criteria->params);
-
-		if($criteria->limit>0)
-			$this->limit=$criteria->limit;
-
-		if($criteria->offset>=0)
-			$this->offset=$criteria->offset;
-
-		if($this->order!==$criteria->order)
-		{
-			if($this->order==='')
-				$this->order=$criteria->order;
-			else if($criteria->order!=='')
-				$this->order.=', '.$criteria->order;
-		}
-
-		if($this->group!==$criteria->group)
-		{
-			if($this->group==='')
-				$this->group=$criteria->group;
-			else if($criteria->group!=='')
-				$this->group.=', '.$criteria->group;
-		}
-
-		if($this->join!==$criteria->join)
-		{
-			if($this->join==='')
-				$this->join=$criteria->join;
-			else if($criteria->join!=='')
-				$this->join.=' '.$criteria->join;
-		}
-
-		if($this->having!==$criteria->having)
-		{
-			if($this->having==='')
-				$this->having=$criteria->having;
-			else if($criteria->having!=='')
-				$this->having="({$this->having}) $and ({$criteria->having})";
-		}
-	}
-
-	/**
-	 * @return array the array representation of the criteria
-	 * @since 1.0.6
-	 */
-	public function toArray()
-	{
-		$result=array();
-		foreach(array('select', 'condition', 'params', 'limit', 'offset', 'order', 'group', 'join', 'having') as $name)
-			$result[$name]=$this->$name;
-		return $result;
-	}
-}
diff --git a/framework/Db/Schema/TDbExpression.php b/framework/Db/Schema/TDbExpression.php
deleted file mode 100755
index 86b9a1ef..00000000
--- a/framework/Db/Schema/TDbExpression.php
+++ /dev/null
@@ -1,49 +0,0 @@
-<?php
-/**
- * TDbExpression class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * TDbExpression represents a DB expression that does not need escaping.
- * TDbExpression is mainly used in {@link CActiveRecord} as attribute values.
- * When inserting or updating a {@link CActiveRecord}, attribute values of
- * type TDbExpression will be directly put into the corresponding SQL statement
- * without escaping. A typical usage is that an attribute is set with 'NOW()'
- * expression so that saving the record would fill the corresponding column
- * with the current DB server timestamp.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TDbExpression.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package system.db.schema
- * @since 1.0.2
- */
-class TDbExpression extends TComponent
-{
-	/**
-	 * @var string the DB expression
-	 */
-	public $expression;
-
-	/**
-	 * Constructor.
-	 * @param string the DB expression
-	 */
-	public function __construct($expression)
-	{
-		$this->expression=$expression;
-	}
-
-	/**
-	 * String magic method
-	 * @return string the DB expression
-	 */
-	public function __toString()
-	{
-		return $this->expression;
-	}
-}
-\ No newline at end of file
diff --git a/framework/Db/Schema/TDbSchema.php b/framework/Db/Schema/TDbSchema.php
deleted file mode 100755
index 6837b7e5..00000000
--- a/framework/Db/Schema/TDbSchema.php
+++ /dev/null
@@ -1,193 +0,0 @@
-<?php
-/**
- * TDbSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbCommandBuilder');
-
-/**
- * TDbSchema is the base class for retrieving metadata information.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TDbSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema
- * @since 1.0
- */
-abstract class TDbSchema extends TComponent
-{
-	private $_tableNames=array();
-	private $_tables=array();
-	private $_connection;
-	private $_builder;
-	private $_cacheExclude=array();
-
-	/**
-	 * Creates a table instance representing the metadata for the named table.
-	 * @return TDbTableSchema driver dependent table metadata, null if the table does not exist.
-	 */
-	abstract protected function createTable($name);
-
-	/**
-	 * Constructor.
-	 * @param TDbConnection database connection.
-	 */
-	public function __construct($conn)
-	{
-		$conn->setActive(true);
-		$this->_connection=$conn;
-		foreach($conn->schemaCachingExclude as $name)
-			$this->_cacheExclude[$name]=true;
-	}
-
-	/**
-	 * @return TDbConnection database connection. The connection is active.
-	 */
-	public function getDbConnection()
-	{
-		return $this->_connection;
-	}
-
-	/**
-	 * Obtains the metadata for the named table.
-	 * @param string table name
-	 * @return TDbTableSchema table metadata. Null if the named table does not exist.
-	 */
-	public function getTable($name)
-	{
-		if(isset($this->_tables[$name]))
-			return $this->_tables[$name];
-		else if(!isset($this->_cacheExclude[$name]) && ($duration=$this->_connection->schemaCachingDuration)>0 && ($cache=prado::getApplication()->getCache())!==null)
-		{
-			$key='prado:dbschema'.$this->_connection->connectionString.':'.$this->_connection->username.':'.$name;
-			if(($table=$cache->get($key))===false)
-			{
-				$table=$this->createTable($name);
-				$cache->set($key,$table,$duration);
-			}
-			return $this->_tables[$name]=$table;
-		}
-		else
-			return $this->_tables[$name]=$this->createTable($name);
-	}
-
-	/**
-	 * Returns the metadata for all tables in the database.
-	 * @param string the schema of the tables. Defaults to empty string, meaning the current or default schema.
-	 * @return array the metadata for all tables in the database.
-	 * Each array element is an instance of {@link TDbTableSchema} (or its child class).
-	 * The array keys are table names.
-	 * @since 1.0.2
-	 */
-	public function getTables($schema='')
-	{
-		$tables=array();
-		foreach($this->getTableNames($schema) as $name)
-			$tables[$name]=$this->getTable($name);
-		return $tables;
-	}
-
-	/**
-	 * Returns all table names in the database.
-	 * @param string the schema of the tables. Defaults to empty string, meaning the current or default schema.
-	 * If not empty, the returned table names will be prefixed with the schema name.
-	 * @return array all table names in the database.
-	 * @since 1.0.2
-	 */
-	public function getTableNames($schema='')
-	{
-		if(!isset($this->_tableNames[$schema]))
-			$this->_tableNames[$schema]=$this->findTableNames($schema);
-		return $this->_tableNames[$schema];
-	}
-
-	/**
-	 * @return TDbCommandBuilder the SQL command builder for this connection.
-	 */
-	public function getCommandBuilder()
-	{
-		if($this->_builder!==null)
-			return $this->_builder;
-		else
-			return $this->_builder=$this->createCommandBuilder();
-	}
-
-	/**
-	 * Refreshes the schema.
-	 * This method resets the loaded table metadata and command builder
-	 * so that they can be recreated to reflect the change of schema.
-	 */
-	public function refresh()
-	{
-		$this->_tables=array();
-		$this->_builder=null;
-	}
-
-	/**
-	 * Quotes a table name for use in a query.
-	 * @param string table name
-	 * @return string the properly quoted table name
-	 */
-	public function quoteTableName($name)
-	{
-		return "'".$name."'";
-	}
-
-	/**
-	 * Quotes a column name for use in a query.
-	 * @param string column name
-	 * @return string the properly quoted column name
-	 */
-	public function quoteColumnName($name)
-	{
-		return '"'.$name.'"';
-	}
-
-	/**
-	 * Compares two table names.
-	 * The table names can be either quoted or unquoted. This method
-	 * will consider both cases.
-	 * @param string table name 1
-	 * @param string table name 2
-	 * @return boolean whether the two table names refer to the same table.
-	 */
-	public function compareTableNames($name1,$name2)
-	{
-		$name1=str_replace(array('"','`',"'"),'',$name1);
-		$name2=str_replace(array('"','`',"'"),'',$name2);
-		if(($pos=strrpos($name1,'.'))!==false)
-			$name1=substr($name1,$pos+1);
-		if(($pos=strrpos($name2,'.'))!==false)
-			$name2=substr($name2,$pos+1);
-		return $name1===$name2;
-	}
-
-	/**
-	 * Creates a command builder for the database.
-	 * This method may be overridden by child classes to create a DBMS-specific command builder.
-	 * @return TDbCommandBuilder command builder instance
-	 */
-	protected function createCommandBuilder()
-	{
-		return new TDbCommandBuilder($this);
-	}
-
-	/**
-	 * Returns all table names in the database.
-	 * This method should be overridden by child classes in order to support this feature
-	 * because the default implemenation simply throws an exception.
-	 * @param string the schema of the tables. Defaults to empty string, meaning the current or default schema.
-	 * If not empty, the returned table names will be prefixed with the schema name.
-	 * @return array all table names in the database.
-	 * @since 1.0.2
-	 */
-	protected function findTableNames($schema='')
-	{
-		throw new TDbException('{0} does not support fetching all table names.',
-			get_class($this));
-	}
-}
diff --git a/framework/Db/Schema/TDbTableSchema.php b/framework/Db/Schema/TDbTableSchema.php
deleted file mode 100755
index eaeda1b4..00000000
--- a/framework/Db/Schema/TDbTableSchema.php
+++ /dev/null
@@ -1,76 +0,0 @@
-<?php
-/**
- * TDbTableSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * TDbTableSchema is the base class for representing the metadata of a database table.
- *
- * It may be extended by different DBMS driver to provide DBMS-specific table metadata.
- *
- * TDbTableSchema provides the following information about a table:
- * <ul>
- * <li>{@link name}</li>
- * <li>{@link rawName}</li>
- * <li>{@link columns}</li>
- * <li>{@link primaryKey}</li>
- * <li>{@link foreignKeys}</li>
- * <li>{@link sequenceName}</li>
- * </ul>
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TDbTableSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package system.db.schema
- * @since 1.0
- */
-class TDbTableSchema extends TComponent
-{
-	/**
-	 * @var string name of this table.
-	 */
-	public $name;
-	/**
-	 * @var string raw name of this table. This is the quoted version of table name with optional schema name. It can be directly used in SQLs.
-	 */
-	public $rawName;
-	/**
-	 * @var string|array primary key name of this table. If composite key, an array of key names is returned.
-	 */
-	public $primaryKey;
-	/**
-	 * @var string sequence name for the primary key. Null if no sequence.
-	 */
-	public $sequenceName;
-	/**
-	 * @var array foreign keys of this table. The array is indexed by column name. Each value is an array of foreign table name and foreign column name.
-	 */
-	public $foreignKeys=array();
-	/**
-	 * @var array column metadata of this table. Each array element is a TDbColumnSchema object, indexed by column names.
-	 */
-	public $columns=array();
-
-	/**
-	 * Gets the named column metadata.
-	 * This is a convenient method for retrieving a named column even if it does not exist.
-	 * @param string column name
-	 * @return TDbColumnSchema metadata of the named column. Null if the named column does not exist.
-	 */
-	public function getColumn($name)
-	{
-		return isset($this->columns[$name]) ? $this->columns[$name] : null;
-	}
-
-	/**
-	 * @return array list of column names
-	 */
-	public function getColumnNames()
-	{
-		return array_keys($this->columns);
-	}
-}
diff --git a/framework/Db/Schema/mssql/TMssqlColumnSchema.php b/framework/Db/Schema/mssql/TMssqlColumnSchema.php
deleted file mode 100755
index 0c5c6ac4..00000000
--- a/framework/Db/Schema/mssql/TMssqlColumnSchema.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-/**
- * TMssqlColumnSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbColumnSchema');
-
-/**
- * TMssqlColumnSchema class describes the column meta data of a MSSQL table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @version $Id: TMssqlColumnSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.mssql
- * @since 1.0.4
- */
-class TMssqlColumnSchema extends TDbColumnSchema
-{
-	/**
-	 * Extracts the PHP type from DB type.
-	 * @param string DB type
-	 */
-	protected function extractType($dbType)
-	{
-		if(strpos($dbType,'bigint')!==false || strpos($dbType,'float')!==false || strpos($dbType,'real')!==false)
-			$this->type='double';
-		else if(strpos($dbType,'int')!==false || strpos($dbType,'smallint')!==false || strpos($dbType,'tinyint'))
-			$this->type='integer';
-		else if(strpos($dbType,'bit')!==false)
-			$this->type='boolean';
-		else
-			$this->type='string';
-	}
-
-	protected function extractDefault($defaultValue)
-	{
-		if($this->dbType==='timestamp' )
-			$this->defaultValue=null;
-		else
-			parent::extractDefault(str_replace(array('(',')',"'"), '', $defaultValue));
-	}
-
-	/**
-	 * Extracts size, precision and scale information from column's DB type.
-	 * We do nothing here, since sizes and precisions have been computed before.
-	 * @param string the column's DB type
-	 */
-	protected function extractLimit($dbType)
-	{
-	}
-}
diff --git a/framework/Db/Schema/mssql/TMssqlCommandBuilder.php b/framework/Db/Schema/mssql/TMssqlCommandBuilder.php
deleted file mode 100755
index f0b5c7f4..00000000
--- a/framework/Db/Schema/mssql/TMssqlCommandBuilder.php
+++ /dev/null
@@ -1,303 +0,0 @@
-<?php
-/**
- * CMsCommandBuilder class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using ('System.Db.schame.TDbCommandBuilder');
-
-/**
- * TMssqlCommandBuilder provides basic methods to create query commands for tables for Mssql Servers.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
- * @version $Id: TMssqlCommandBuilder.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package system.db.schema.mssql
- * @since 1.0.4
- */
-class TMssqlCommandBuilder extends TDbCommandBuilder
-{
-   	/**
-	 * Returns the last insertion ID for the specified table.
-	 * Override parent implemantation since PDO mssql driver does not provide this method
-	 * @param TDbTableSchema the table metadata
-	 * @return mixed last insertion id. Null is returned if no sequence name.
-	 */
-	public function getLastInsertID($table)
-	{
-		if($table->sequenceName!==null)
-			return $this->getDbConnection()->createCommand('SELECT SCOPE_IDENTITY()')->queryScalar();
-		else
-			return null;
-	}
-
-	/**
-	 * Creates a COUNT(*) command for a single table.
-	 * Override parent implementation to remove the order clause of criteria if it exists
-	 * @param TDbTableSchema the table metadata
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand query command.
-	 */
-	public function createCountCommand($table,$criteria)
-	{
-		$criteria->order='';
-		return parent::createCountCommand($table, $criteria);
-	}
-
-	/**
-	 * Creates a SELECT command for a single table.
-	 * Override parent implementation to check if an orderby clause if specified when querying with an offset
-	 * @param TDbTableSchema the table metadata
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand query command.
-	 */
-	public function createFindCommand($table,$criteria)
-	{
-		$criteria=$this->checkCriteria($table,$criteria);
-		return parent::createFindCommand($table,$criteria);
-
-	}
-
-	/**
-	 * Creates an UPDATE command.
-	 * Override parent implementation because mssql don't want to update an identity column
-	 * @param TDbTableSchema the table metadata
-	 * @param array list of columns to be updated (name=>value)
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand update command.
-	 */
-	public function createUpdateCommand($table,$data,$criteria)
-	{
-		$criteria=$this->checkCriteria($table,$criteria);
-		$fields=array();
-		$values=array();
-		$bindByPosition=isset($criteria->params[0]);
-		foreach($data as $name=>$value)
-		{
-			if(($column=$table->getColumn($name))!==null)
-			{
-				if ($table->sequenceName !== null && $column->isPrimaryKey === true) continue;
-				if($value instanceof TDbExpression)
-					$fields[]=$column->rawName.'='.(string)$value;
-				else if($bindByPosition)
-				{
-					$fields[]=$column->rawName.'=?';
-					$values[]=$column->typecast($value);
-				}
-				else
-				{
-					$fields[]=$column->rawName.'=:'.$name;
-					$values[':'.$name]=$column->typecast($value);
-				}
-			}
-		}
-		if($fields===array())
-			throw new TDbException('No columns are being updated for table "{0}".',
-				$table->name);
-		$sql="UPDATE {$table->rawName} SET ".implode(', ',$fields);
-		$sql=$this->applyJoin($sql,$criteria->join);
-		$sql=$this->applyCondition($sql,$criteria->condition);
-		$sql=$this->applyOrder($sql,$criteria->order);
-		$sql=$this->applyLimit($sql,$criteria->limit,$criteria->offset);
-
-		$command=$this->getDbConnection()->createCommand($sql);
-		$this->bindValues($command,array_merge($values,$criteria->params));
-
-		return $command;
-	}
-
-	/**
-	 * Creates a DELETE command.
-	 * Override parent implementation to check if an orderby clause if specified when querying with an offset
-	 * @param TDbTableSchema the table metadata
-	 * @param TDbCriteria the query criteria
-	 * @return TDbCommand delete command.
-	 */
-	public function createDeleteCommand($table,$criteria)
-	{
-		$criteria=$this->checkCriteria($table, $criteria);
-		return parent::createDeleteCommand($table, $criteria);
-	}
-
-	/**
-	 * Creates an UPDATE command that increments/decrements certain columns.
-	 * Override parent implementation to check if an orderby clause if specified when querying with an offset
-	 * @param TDbTableSchema the table metadata
-	 * @param TDbCriteria the query criteria
-	 * @param array counters to be updated (counter increments/decrements indexed by column names.)
-	 * @return TDbCommand the created command
-	 * @throws CException if no counter is specified
-	 */
-	public function createUpdateCounterCommand($table,$counters,$criteria)
-	{
-		$criteria=$this->checkCriteria($table, $criteria);
-		return parent::createUpdateCounterCommand($table, $counters, $criteria);
-	}
-
-	/**
-	 * This is a port from Prado Framework.
-	 *
-	 * Overrides parent implementation. Alters the sql to apply $limit and $offset.
-	 * The idea for limit with offset is done by modifying the sql on the fly
-	 * with numerous assumptions on the structure of the sql string.
-	 * The modification is done with reference to the notes from
-	 * http://troels.arvin.dk/db/rdbms/#select-limit-offset
-	 *
-	 * <code>
-	 * SELECT * FROM (
-	 *  SELECT TOP n * FROM (
-	 *    SELECT TOP z columns      -- (z=n+skip)
-	 *    FROM tablename
-	 *    ORDER BY key ASC
-	 *  ) AS FOO ORDER BY key DESC -- ('FOO' may be anything)
-	 * ) AS BAR ORDER BY key ASC    -- ('BAR' may be anything)
-	 * </code>
-	 *
-	 * <b>Regular expressions are used to alter the SQL query. The resulting SQL query
-	 * may be malformed for complex queries.</b> The following restrictions apply
-	 *
-	 * <ul>
-	 *   <li>
-	 * In particular, <b>commas</b> should <b>NOT</b>
-	 * be used as part of the ordering expression or identifier. Commas must only be
-	 * used for separating the ordering clauses.
-	 *  </li>
-	 *  <li>
-	 * In the ORDER BY clause, the column name should NOT be be qualified
-	 * with a table name or view name. Alias the column names or use column index.
-	 * </li>
-	 * <li>
-	 * No clauses should follow the ORDER BY clause, e.g. no COMPUTE or FOR clauses.
-	 * </li>
-	 *
-	 * @param string SQL query string.
-	 * @param integer maximum number of rows, -1 to ignore limit.
-	 * @param integer row offset, -1 to ignore offset.
-	 * @return string SQL with limit and offset.
-	 *
-	 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
-	 */
-	public function applyLimit($sql, $limit, $offset)
-	{
-		$limit = $limit!==null ? intval($limit) : -1;
-		$offset = $offset!==null ? intval($offset) : -1;
-		if ($limit > 0 && $offset <= 0) //just limit
-			$sql = preg_replace('/^([\s(])*SELECT( DISTINCT)?(?!\s*TOP\s*\()/i',"\\1SELECT\\2 TOP $limit", $sql);
-		else if($limit > 0 && $offset > 0)
-			$sql = $this->rewriteLimitOffsetSql($sql, $limit,$offset);
-		return $sql;
-	}
-
-	/**
-	 * Rewrite sql to apply $limit > and $offset > 0 for MSSQL database.
-	 * See http://troels.arvin.dk/db/rdbms/#select-limit-offset
-	 * @param string sql query
-	 * @param integer $limit > 0
-	 * @param integer $offset > 0
-	 * @return sql modified sql query applied with limit and offset.
-	 *
-	 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
-	 */
-	protected function rewriteLimitOffsetSql($sql, $limit, $offset)
-	{
-		$fetch = $limit+$offset;
-		$sql = preg_replace('/^([\s(])*SELECT( DISTINCT)?(?!\s*TOP\s*\()/i',"\\1SELECT\\2 TOP $fetch", $sql);
-		$ordering = $this->findOrdering($sql);
-
-		$orginalOrdering = $this->joinOrdering($ordering);
-		$reverseOrdering = $this->joinOrdering($this->reverseDirection($ordering));
-		$sql = "SELECT * FROM (SELECT TOP {$limit} * FROM ($sql) as [__inner top table__] {$reverseOrdering}) as [__outer top table__] {$orginalOrdering}";
-		return $sql;
-	}
-
-	/**
-	 * Base on simplified syntax http://msdn2.microsoft.com/en-us/library/aa259187(SQL.80).aspx
-	 *
-	 * @param string $sql
-	 * @return array ordering expression as key and ordering direction as value
-	 *
-	 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
-	 */
-	protected function findOrdering($sql)
-	{
-		if(!preg_match('/ORDER BY/i', $sql))
-			return array();
-		$matches=array();
-		$ordering=array();
-		preg_match_all('/(ORDER BY)[\s"\[](.*)(ASC|DESC)?(?:[\s"\[]|$|COMPUTE|FOR)/i', $sql, $matches);
-		if(count($matches)>1 && count($matches[2]) > 0)
-		{
-			$parts = explode(',', $matches[2][0]);
-			foreach($parts as $part)
-			{
-				$subs=array();
-				if(preg_match_all('/(.*)[\s"\]](ASC|DESC)$/i', trim($part), $subs))
-				{
-					if(count($subs) > 1 && count($subs[2]) > 0)
-					{
-						$ordering[$subs[1][0]] = $subs[2][0];
-					}
-					//else what?
-				}
-				else
-					$ordering[trim($part)] = 'ASC';
-			}
-		}
-		return $ordering;
-	}
-
-	/**
-	 * @param array ordering obtained from findOrdering()
-	 * @return string concat the orderings
-	 *
-	 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
-	 */
-	protected function joinOrdering($orders)
-	{
-		if(count($orders)>0)
-		{
-			$str=array();
-			foreach($orders as $column => $direction)
-				$str[] = $column.' '.$direction;
-			return 'ORDER BY '.implode(', ', $str);
-		}
-	}
-
-	/**
-	 * @param array original ordering
-	 * @return array ordering with reversed direction.
-	 *
-	 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
-	 */
-	protected function reverseDirection($orders)
-	{
-		foreach($orders as $column => $direction)
-			$orders[$column] = strtolower(trim($direction))==='desc' ? 'ASC' : 'DESC';
-		return $orders;
-	}
-
-
-	/**
-	 * Checks if the criteria has an order by clause when using offset/limit.
-	 * Override parent implementation to check if an orderby clause if specified when querying with an offset
-	 * If not, order it by pk.
-	 * @param TMssqlTableSchema table schema
-	 * @param TDbCriteria criteria
-	 * @return TDbCrireria the modified criteria
-	 */
-	protected function checkCriteria($table, $criteria)
-	{
-		if ($criteria->offset > 0 && $criteria->order==='')
-		{
-			$criteria->order=is_array($table->primaryKey)?implode(',',$table->primaryKey):$table->primaryKey;
-		}
-		return $criteria;
-	}
-}
diff --git a/framework/Db/Schema/mssql/TMssqlPdoAdapter.php b/framework/Db/Schema/mssql/TMssqlPdoAdapter.php
deleted file mode 100755
index c9d4597f..00000000
--- a/framework/Db/Schema/mssql/TMssqlPdoAdapter.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-/**
- * TMssqlPdo class file
- *
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * This is an extension of default PDO class for mssql driver only
- * It provides some missing functionalities of pdo driver
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @version $Id: TMssqlPdoAdapter.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package system.db.schema.mssql
- * @since 1.0.4
- */
-class TMssqlPdoAdapter extends PDO
-{
-	/**
-	 * Get the last inserted id value
-	 * MSSQL doesn't support sequence, so, argument is ignored
-	 *
-	 * @param string sequence name. Defaults to null
-	 * @return int last inserted id
-	 */
-	public function lastInsertId ($sequence=NULL)
-	{
-		return $this->query('SELECT SCOPE_IDENTITY()')->fetchColumn();
-	}
-
-	/**
-	 * Begin a transaction
-	 *
-	 * Is is necessary to override pdo's method, as mssql pdo drivers
-	 * does not support transaction
-	 *
-	 * @return boolean
-	 */
-	public function beginTransaction ()
-	{
-		$this->exec('BEGIN TRANSACTION');
-		return true;
-	}
-
-	/**
-	 * Commit a transaction
-	 *
-	 * Is is necessary to override pdo's method, as mssql pdo drivers
-	 * does not support transaction
-	 *
-	 * @return boolean
-	 */
-	public function commit ()
-	{
-		$this->exec('COMMIT TRANSACTION');
-		return true;
-	}
-
-	/**
-	 * Rollback a transaction
-	 *
-	 * Is is necessary to override pdo's method, ac mssql pdo drivers
-	 * does not support transaction
-	 *
-	 * @return boolean
-	 */
-	public function rollBack ()
-	{
-		$this->exec('ROLLBACK TRANSACTION');
-		return true;
-	}
-}
diff --git a/framework/Db/Schema/mssql/TMssqlSchema.php b/framework/Db/Schema/mssql/TMssqlSchema.php
deleted file mode 100755
index 063e8994..00000000
--- a/framework/Db/Schema/mssql/TMssqlSchema.php
+++ /dev/null
@@ -1,312 +0,0 @@
-<?php
-/**
- * TMssqlSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbSchema');
-
-/**
- * TMssqlSchema is the class for retrieving metadata information from a MS SQL Server database.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @version $Id: TMssqlSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.mssql
- * @since 1.0.4
- */
-class TMssqlSchema extends TDbSchema
-{
-	const DEFAULT_SCHEMA='dbo';
-
-
-	/**
-	 * Quotes a table name for use in a query.
-	 * @param string table name
-	 * @return string the properly quoted table name
-	 */
-	public function quoteTableName($name)
-	{
-		if (strpos($name,'.')===false)
-			return '['.$name.']';
-		$names=explode('.',$name);
-		foreach ($names as &$n)
-			$n = '['.$n.']';
-		return implode('.',$names);
-	}
-
-	/**
-	 * Quotes a column name for use in a query.
-	 * @param string column name
-	 * @return string the properly quoted column name
-	 */
-	public function quoteColumnName($name)
-	{
-		return '['.$name.']';
-	}
-
-	/**
-	 * Compares two table names.
-	 * The table names can be either quoted or unquoted. This method
-	 * will consider both cases.
-	 * @param string table name 1
-	 * @param string table name 2
-	 * @return boolean whether the two table names refer to the same table.
-	 */
-	public function compareTableNames($name1,$name2)
-	{
-		$name1=str_replace(array('[',']'),'',$name1);
-		$name1=str_replace(array('[',']'),'',$name2);
-		return parent::compareTableNames(strtolower($name1),strtolower($name2));
-	}
-
-	/**
-	 * Creates a table instance representing the metadata for the named table.
-	 * @return CMysqlTableSchema driver dependent table metadata. Null if the table does not exist.
-	 */
-	protected function createTable($name)
-	{
-		$table=new TMssqlTableSchema;
-		$this->resolveTableNames($table,$name);
-		//if (!in_array($table->name, $this->tableNames)) return null;
-		$table->primaryKey=$this->findPrimaryKey($table);
-		$table->foreignKeys=$this->findForeignKeys($table);
-		if($this->findColumns($table))
-		{
-			return $table;
-		}
-		else
-			return null;
-	}
-
-	/**
-	 * Generates various kinds of table names.
-	 * @param CMysqlTableSchema the table instance
-	 * @param string the unquoted table name
-	 */
-	protected function resolveTableNames($table,$name)
-	{
-		$parts=explode('.',str_replace(array('[',']'),'',$name));
-		if(($c=count($parts))==3)
-		{
-			// Catalog name, schema name and table name provided
-			$table->catalogName=$parts[0];
-			$table->schemaName=$parts[1];
-			$table->name=$parts[2];
-			$table->rawName=$this->quoteTableName($table->catalogName).'.'.$this->quoteTableName($table->schemaName).'.'.$this->quoteTableName($table->name);
-		}
-		elseif ($c==2)
-		{
-			// Only schema name and table name provided
-			$table->name=$parts[1];
-			$table->schemaName=$parts[0];
-			$table->rawName=$this->quoteTableName($table->schemaName).'.'.$this->quoteTableName($table->name);
-		}
-		else
-		{
-			// Only the name given, we need to get at least the schema name
-			//if (empty($this->_schemaNames)) $this->findTableNames();
-			$table->name=$parts[0];
-			$table->schemaName=self::DEFAULT_SCHEMA;
-			$table->rawName=$this->quoteTableName($table->schemaName).'.'.$this->quoteTableName($table->name);
-		}
-	}
-
-	/**
-	 * Gets the primary key column(s) details for the given table.
-	 * @param TMssqlTableSchema table
-	 * @return mixed primary keys (null if no pk, string if only 1 column pk, or array if composite pk)
-	 */
-	protected function findPrimaryKey($table)
-	{
-		$kcu='INFORMATION_SCHEMA.KEY_COLUMN_USAGE';
-		$tc='INFORMATION_SCHEMA.TABLE_CONSTRAINTS';
-		if (isset($table->catalogName))
-		{
-			$kcu=$table->catalogName.'.'.$kcu;
-			$tc=$table->catalogName.'.'.$tc;
-		}
-
-		$sql = <<<EOD
-		SELECT k.column_name field_name
-			FROM {$this->quoteTableName($kcu)} k
-		    LEFT JOIN {$this->quoteTableName($tc)} c
-		      ON k.table_name = c.table_name
-		     AND k.constraint_name = c.constraint_name
-		   WHERE c.constraint_type ='PRIMARY KEY'
-		   	    AND k.table_name = :table
-				AND k.table_schema = :schema
-EOD;
-		$command = $this->getDbConnection()->createCommand($sql);
-		$command->bindValue(':table', $table->name);
-		$command->bindValue(':schema', $table->schemaName);
-		$primary=$command->queryColumn();
-		switch (count($primary))
-		{
-			case 0: // No primary key on table
-				$primary=null;
-				break;
-			case 1: // Only 1 primary key
-				$primary=$primary[0];
-				break;
-		}
-		return $primary;
-	}
-
-	/**
-	 * Gets foreign relationship constraint keys and table name
-	 * @param TMssqlTableSchema table
-	 * @return array foreign relationship table name and keys.
-	 */
-	protected function findForeignKeys($table)
-	{
-		$rc='INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS';
-		$kcu='INFORMATION_SCHEMA.KEY_COLUMN_USAGE';
-		if (isset($table->catalogName))
-		{
-			$kcu=$table->catalogName.'.'.$kcu;
-			$rc=$table->catalogName.'.'.$rc;
-		}
-
-		//From http://msdn2.microsoft.com/en-us/library/aa175805(SQL.80).aspx
-		$sql = <<<EOD
-		SELECT
-		     KCU1.CONSTRAINT_NAME AS 'FK_CONSTRAINT_NAME'
-		   , KCU1.TABLE_NAME AS 'FK_TABLE_NAME'
-		   , KCU1.COLUMN_NAME AS 'FK_COLUMN_NAME'
-		   , KCU1.ORDINAL_POSITION AS 'FK_ORDINAL_POSITION'
-		   , KCU2.CONSTRAINT_NAME AS 'UQ_CONSTRAINT_NAME'
-		   , KCU2.TABLE_NAME AS 'UQ_TABLE_NAME'
-		   , KCU2.COLUMN_NAME AS 'UQ_COLUMN_NAME'
-		   , KCU2.ORDINAL_POSITION AS 'UQ_ORDINAL_POSITION'
-		FROM {$this->quoteTableName($rc)} RC
-		JOIN {$this->quoteTableName($kcu)} KCU1
-		ON KCU1.CONSTRAINT_CATALOG = RC.CONSTRAINT_CATALOG
-		   AND KCU1.CONSTRAINT_SCHEMA = RC.CONSTRAINT_SCHEMA
-		   AND KCU1.CONSTRAINT_NAME = RC.CONSTRAINT_NAME
-		JOIN {$this->quoteTableName($kcu)} KCU2
-		ON KCU2.CONSTRAINT_CATALOG =
-		RC.UNIQUE_CONSTRAINT_CATALOG
-		   AND KCU2.CONSTRAINT_SCHEMA =
-		RC.UNIQUE_CONSTRAINT_SCHEMA
-		   AND KCU2.CONSTRAINT_NAME =
-		RC.UNIQUE_CONSTRAINT_NAME
-		   AND KCU2.ORDINAL_POSITION = KCU1.ORDINAL_POSITION
-		WHERE KCU1.TABLE_NAME = :table
-EOD;
-		$command = $this->getDbConnection()->createCommand($sql);
-		$command->bindValue(':table', $table->name);
-		$fkeys=array();
-		foreach($command->queryAll() as $info)
-		{
-			$fkeys[$info['FK_COLUMN_NAME']]=array($info['UQ_TABLE_NAME'],$info['UQ_COLUMN_NAME'],);
-
-		}
-		return $fkeys;
-	}
-
-
-	/**
-	 * Collects the table column metadata.
-	 * @param CMysqlTableSchema the table metadata
-	 * @return boolean whether the table exists in the database
-	 */
-	protected function findColumns($table)
-	{
-		$where=array();
-		$where[]="TABLE_NAME='".$table->name."'";
-		if (isset($table->catalogName))
-			$where[]="TABLE_CATALOG='".$table->catalogName."'";
-		if (isset($table->schemaName))
-			$where[]="TABLE_SCHEMA='".$table->schemaName."'";
-		$sql="SELECT *, columnproperty(object_id(table_schema+'.'+table_name), column_name, 'IsIdentity') as IsIdentity ".
-			 "FROM INFORMATION_SCHEMA.COLUMNS WHERE ".join(' AND ',$where);
-		if (($columns=$this->getDbConnection()->createCommand($sql)->queryAll())===array())
-			return false;
-
-		foreach($columns as $column)
-		{
-			$c=$this->createColumn($column);
-			if (is_array($table->primaryKey))
-				$c->isPrimaryKey=in_array($c->name, $table->primaryKey);
-			else
-				$c->isPrimaryKey=strcasecmp($c->name,$table->primaryKey)===0;
-
-			$c->isForeignKey=isset($table->foreignKeys[$c->name]);
-			$table->columns[$c->name]=$c;
-			if ($column['IsIdentity']==1 && $table->sequenceName===null)
-				$table->sequenceName='';
-
-		}
-		return true;
-	}
-
-	/**
-	 * Creates a table column.
-	 * @param array column metadata
-	 * @return TDbColumnSchema normalized column metadata
-	 */
-	protected function createColumn($column)
-	{
-		$c=new TMssqlColumnSchema;
-		$c->name=$column['COLUMN_NAME'];
-		$c->rawName=$this->quoteColumnName($c->name);
-		$c->allowNull=$column['IS_NULLABLE']=='YES';
-		if ($column['NUMERIC_PRECISION_RADIX']!==null)
-		{
-			// We have a numeric datatype
-			$c->size=$c->precision=$column['NUMERIC_PRECISION']!==null?(int)$column['NUMERIC_PRECISION']:null;
-			$c->scale=$column['NUMERIC_SCALE']!==null?(int)$column['NUMERIC_SCALE']:null;
-		}
-		elseif ($column['DATA_TYPE']=='image' || $column['DATA_TYPE']=='text')
-			$c->size=$c->precision=null;
-		else
-			$c->size=$c->precision=($column['CHARACTER_MAXIMUM_LENGTH']!== null)?(int)$column['CHARACTER_MAXIMUM_LENGTH']:null;
-
-		$c->init($column['DATA_TYPE'],$column['COLUMN_DEFAULT']);
-		return $c;
-	}
-
-	/**
-	 * Returns all table names in the database.
-	 * @return array all table names in the database.
-	 * @since 1.0.4
-	 */
-	protected function findTableNames($schema='')
-	{
-		if($schema==='')
-			$schema=self::DEFAULT_SCHEMA;
-		$sql=<<<EOD
-SELECT TABLE_NAME, TABLE_SCHEMA FROM [INFORMATION_SCHEMA].[TABLES]
-WHERE TABLE_TYPE='BASE TABLE' AND TABLE_SCHEMA=:schema
-EOD;
-		$command=$this->getDbConnection()->createCommand($sql);
-		$command->bindParam(":schema", $schema);
-		$rows=$command->queryAll();
-		$names=array();
-		foreach ($rows as $row)
-		{
-			if ($schema == self::DEFAULT_SCHEMA)
-				$names[]=$row['TABLE_NAME'];
-			else
-				$names[]=$schema.'.'.$row['TABLE_SCHEMA'].'.'.$row['TABLE_NAME'];
-		}
-
-		return $names;
-	}
-
-	/**
-	 * Creates a command builder for the database.
-	 * This method overrides parent implementation in order to create a MSSQL specific command builder
-	 * @return TDbCommandBuilder command builder instance
-	 */
-	protected function createCommandBuilder()
-	{
-		return new TMssqlCommandBuilder($this);
-	}
-}
diff --git a/framework/Db/Schema/mssql/TMssqlTableSchema.php b/framework/Db/Schema/mssql/TMssqlTableSchema.php
deleted file mode 100755
index ed1b7c8a..00000000
--- a/framework/Db/Schema/mssql/TMssqlTableSchema.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-/**
- * TMssqlTableSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.TDbTableSchema');
-
-/**
- * TMssqlTableSchema represents the metadata for a MSSQL table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @version $Id: TMssqlTableSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package system.Db.schema.mssql
- * @since 1.0.4
- */
-class TMssqlTableSchema extends TDbTableSchema
-{
-	/**
-	 * @var string name of the catalog (database) that this table belongs to.
-	 * Defaults to null, meaning no schema (or the current database).
-	 */
-	public $catalogName;
-	/**
-	 * @var string name of the schema that this table belongs to.
-	 * Defaults to null, meaning no schema (or the current database owner).
-	 */
-	public $schemaName;
-}
diff --git a/framework/Db/Schema/mysql/TMysqlColumnSchema.php b/framework/Db/Schema/mysql/TMysqlColumnSchema.php
deleted file mode 100755
index d3bb230c..00000000
--- a/framework/Db/Schema/mysql/TMysqlColumnSchema.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-/**
- * TMysqlColumnSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbColumnSchema');
-
-/**
- * TMysqlColumnSchema class describes the column meta data of a MySQL table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TMysqlColumnSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.mysql
- * @since 1.0
- */
-class TMysqlColumnSchema extends TDbColumnSchema
-{
-	/**
-	 * Extracts the PHP type from DB type.
-	 * @param string DB type
-	 */
-	protected function extractType($dbType)
-	{
-		if(strpos($dbType,'bigint')!==false || strpos($dbType,'float')!==false || strpos($dbType,'double')!==false)
-			$this->type='double';
-		else if(strpos($dbType,'bool')!==false || $dbType==='tinyint(1)')
-			$this->type='boolean';
-		else if(strpos($dbType,'int')!==false || strpos($dbType,'bit')!==false)
-			$this->type='integer';
-		else
-			$this->type='string';
-	}
-
-	protected function extractDefault($defaultValue)
-	{
-		if($this->dbType==='timestamp' && $defaultValue==='CURRENT_TIMESTAMP')
-			$this->defaultValue=null;
-		else
-			parent::extractDefault($defaultValue);
-	}
-}
diff --git a/framework/Db/Schema/mysql/TMysqlSchema.php b/framework/Db/Schema/mysql/TMysqlSchema.php
deleted file mode 100755
index 8061e7a8..00000000
--- a/framework/Db/Schema/mysql/TMysqlSchema.php
+++ /dev/null
@@ -1,205 +0,0 @@
-<?php
-/**
- * TMysqlSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbSchema');
-prado::using('System.Db.Schema.mysql.TMysqlTableSchema');
-prado::using('System.Db.Schema.mysql.TMysqlColumnSchema');
-
-/**
- * TMysqlSchema is the class for retrieving metadata information from a MySQL database (version 4.1.x and 5.x).
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TMysqlSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.mysql
- * @since 1.0
- */
-class TMysqlSchema extends TDbSchema
-{
-	private $_tableNames;
-	private $_schemaNames;
-
-	/**
-	 * Quotes a table name for use in a query.
-	 * @param string table name
-	 * @return string the properly quoted table name
-	 */
-	public function quoteTableName($name)
-	{
-		return '`'.$name.'`';
-	}
-
-	/**
-	 * Quotes a column name for use in a query.
-	 * @param string column name
-	 * @return string the properly quoted column name
-	 */
-	public function quoteColumnName($name)
-	{
-		return '`'.$name.'`';
-	}
-
-	/**
-	 * Compares two table names.
-	 * The table names can be either quoted or unquoted. This method
-	 * will consider both cases.
-	 * @param string table name 1
-	 * @param string table name 2
-	 * @return boolean whether the two table names refer to the same table.
-	 */
-	public function compareTableNames($name1,$name2)
-	{
-		return parent::compareTableNames(strtolower($name1),strtolower($name2));
-	}
-
-	/**
-	 * Creates a table instance representing the metadata for the named table.
-	 * @return TMysqlTableSchema driver dependent table metadata. Null if the table does not exist.
-	 */
-	protected function createTable($name)
-	{
-		$table=new TMysqlTableSchema;
-		$this->resolveTableNames($table,$name);
-
-		if($this->findColumns($table))
-		{
-			$this->findConstraints($table);
-			return $table;
-		}
-		else
-			return null;
-	}
-
-	/**
-	 * Generates various kinds of table names.
-	 * @param TMysqlTableSchema the table instance
-	 * @param string the unquoted table name
-	 */
-	protected function resolveTableNames($table,$name)
-	{
-		$parts=explode('.',str_replace('`','',$name));
-		if(isset($parts[1]))
-		{
-			$table->schemaName=$parts[0];
-			$table->name=$parts[1];
-			$table->rawName=$this->quoteTableName($table->schemaName).'.'.$this->quoteTableName($table->name);
-		}
-		else
-		{
-			$table->name=$parts[0];
-			$table->rawName=$this->quoteTableName($table->name);
-		}
-	}
-
-	/**
-	 * Collects the table column metadata.
-	 * @param TMysqlTableSchema the table metadata
-	 * @return boolean whether the table exists in the database
-	 */
-	protected function findColumns($table)
-	{
-		$sql='SHOW COLUMNS FROM '.$table->rawName;
-		try
-		{
-			$columns=$this->getDbConnection()->createCommand($sql)->queryAll();
-		}
-		catch(Exception $e)
-		{
-			return false;
-		}
-		foreach($columns as $column)
-		{
-			$c=$this->createColumn($column);
-			$table->columns[$c->name]=$c;
-			if($c->isPrimaryKey)
-			{
-				if($table->primaryKey===null)
-					$table->primaryKey=$c->name;
-				else if(is_string($table->primaryKey))
-					$table->primaryKey=array($table->primaryKey,$c->name);
-				else
-					$table->primaryKey[]=$c->name;
-				if(strpos(strtolower($column['Extra']),'auto_increment')!==false)
-					$table->sequenceName='';
-			}
-		}
-		return true;
-	}
-
-	/**
-	 * Creates a table column.
-	 * @param array column metadata
-	 * @return TDbColumnSchema normalized column metadata
-	 */
-	protected function createColumn($column)
-	{
-		$c=new TMysqlColumnSchema;
-		$c->name=$column['Field'];
-		$c->rawName=$this->quoteColumnName($c->name);
-		$c->allowNull=$column['Null']==='YES';
-		$c->isPrimaryKey=strpos($column['Key'],'PRI')!==false;
-		$c->isForeignKey=false;
-		$c->init($column['Type'],$column['Default']);
-		return $c;
-	}
-
-	/**
-	 * @return float server version.
-	 */
-	protected function getServerVersion()
-	{
-		$version=$this->getDbConnection()->getAttribute(PDO::ATTR_SERVER_VERSION);
-		$digits=array();
-		preg_match('/(\d+)\.(\d+)\.(\d+)/', $version, $digits);
-		return floatval($digits[1].'.'.$digits[2].$digits[3]);
-	}
-
-	/**
-	 * Collects the foreign key column details for the given table.
-	 * @param TMysqlTableSchema the table metadata
-	 */
-	protected function findConstraints($table)
-	{
-		$row=$this->getDbConnection()->createCommand('SHOW CREATE TABLE '.$table->rawName)->queryRow();
-		$matches=array();
-		$regexp='/FOREIGN KEY\s+\(([^\)]+)\)\s+REFERENCES\s+([^\(^\s]+)\s*\(([^\)]+)\)/mi';
-		foreach($row as $sql)
-		{
-			if(preg_match_all($regexp,$sql,$matches,PREG_SET_ORDER))
-				break;
-		}
-		$foreign = array();
-		foreach($matches as $match)
-		{
-			$keys=array_map('trim',explode(',',str_replace('`','',$match[1])));
-			$fks=array_map('trim',explode(',',str_replace('`','',$match[3])));
-			foreach($keys as $k=>$name)
-			{
-				$table->foreignKeys[$name]=array(str_replace('`','',$match[2]),$fks[$k]);
-				if(isset($table->columns[$name]))
-					$table->columns[$name]->isForeignKey=true;
-			}
-		}
-	}
-
-	/**
-	 * Returns all table names in the database.
-	 * @return array all table names in the database.
-	 * @since 1.0.2
-	 */
-	protected function findTableNames($schema='')
-	{
-		if($schema==='')
-			return $this->getDbConnection()->createCommand('SHOW TABLES')->queryColumn();
-		$names=$this->getDbConnection()->createCommand('SHOW TABLES FROM '.$this->quoteTableName($schema))->queryColumn();
-		foreach($names as &$name)
-			$name=$schema.'.'.$name;
-		return $names;
-	}
-}
diff --git a/framework/Db/Schema/mysql/TMysqlTableSchema.php b/framework/Db/Schema/mysql/TMysqlTableSchema.php
deleted file mode 100755
index 8bed3314..00000000
--- a/framework/Db/Schema/mysql/TMysqlTableSchema.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-/**
- * TMysqlTableSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-prado::using('System.Db.Schema.TDbTableSchema');
-/**
- * TMysqlTableSchema represents the metadata for a MySQL table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TMysqlTableSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.mysql
- * @since 1.0
- */
-class TMysqlTableSchema extends TDbTableSchema
-{
-	/**
-	 * @var string name of the schema (database) that this table belongs to.
-	 * Defaults to null, meaning no schema (or the current database).
-	 */
-	public $schemaName;
-}
diff --git a/framework/Db/Schema/oci/TOciColumnSchema.php b/framework/Db/Schema/oci/TOciColumnSchema.php
deleted file mode 100755
index d609d14d..00000000
--- a/framework/Db/Schema/oci/TOciColumnSchema.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-/**
- * TOciColumnSchema class file.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbColumnSchema');
-
-/**
- * TOciColumnSchema class describes the column meta data of a Oracle table.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @version $Id: TOciColumnSchema.php
- * @package System.Db.Schema.oci
- * @since 1.0.5
- */
-class TOciColumnSchema extends TDbColumnSchema
-{
-	/**
-	 * Extracts the PHP type from DB type.
-	 * @param string DB type
-	 */
-	protected function extractOraType($dbType){
-		if(strpos($dbType,'FLOAT')!==false) return 'double';
-
-		if ((strpos($dbType,'NUMBER')!==false) or
-			(strpos($dbType,'INTEGER')!==false))
-		{
-			if(strpos($dbType,'(') && preg_match('/\((.*)\)/',$dbType,$matches))
-			{
-				$values=explode(',',$matches[1]);
-				if(isset($values[1]) and (((int)$values[1]) > 0))
-					return 'double';
-				else return 'integer';
-			}
-		}else{
-			return 'string';
-		}
-	}
-	protected function extractType($dbType)
-	{
-		$this->type=$this->extractOraType($dbType);
-	}
-
-	protected function extractDefault($defaultValue)
-	{
-		if(strpos($dbType,'timestamp')!==false)
-			$this->defaultValue=null;
-		else
-			parent::extractDefault($defaultValue);
-	}
-}
diff --git a/framework/Db/Schema/oci/TOciCommandBuilder.php b/framework/Db/Schema/oci/TOciCommandBuilder.php
deleted file mode 100755
index 807b7271..00000000
--- a/framework/Db/Schema/oci/TOciCommandBuilder.php
+++ /dev/null
@@ -1,122 +0,0 @@
-<?php
-/**
- * TOciCommandBuilder class file.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbCommandBuilder');
-
-/**
- * TOciCommandBuilder provides basic methods to create query commands for tables.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @version $Id: TOciCommandBuilder.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.oci
- * @since 1.0.5
- */
-class TOciCommandBuilder extends TDbCommandBuilder
-{
-	/**
-	 * @var integer the last insertion ID
-	 */
-	public $returnID;
-
-	/**
-	 * Returns the last insertion ID for the specified table.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @return mixed last insertion id. Null is returned if no sequence name.
-	 */
-	public function getLastInsertID($table)
-	{
-		return $this->returnID;
-	}
-
-	/**
-	 * Alters the SQL to apply LIMIT and OFFSET.
-	 * Default implementation is applicable for PostgreSQL, MySQL and SQLite.
-	 * @param string SQL query string without LIMIT and OFFSET.
-	 * @param integer maximum number of rows, -1 to ignore limit.
-	 * @param integer row offset, -1 to ignore offset.
-	 * @return string SQL with LIMIT and OFFSET
-	 */
-	public function applyLimit($sql,$limit,$offset)
-	{
-		if (($limit < 0) and ($offset < 0)) return $sql;
-
-		$filters = array();
-		if($offset>0){
-			$filters[] = 'rowNumId >= '.(int)$offset;
-		}
-
-		if($limit>=0){
-			$filters[]= 'rownum <= '.(int)$limit;
-		}
-
-		if (count($filters) > 0){
-			$filter = implode(' and ', $filters);
-			$filter= " WHERE ".$filter;
-		}else{
-			$filter = '';
-		}
-
-
-		$sql = <<<EOD
-				WITH USER_SQL AS ({$sql}),
-				   PAGINATION AS (SELECT USER_SQL.*, rownum as rowNumId FROM USER_SQL)
-				SELECT *
-				FROM PAGINATION
-				{$filter}
-EOD;
-
-		return $sql;
-	}
-
-	/**
-	 * Creates an INSERT command.
-	 * @param mixed the table schema ({@link TDbTableSchema}) or the table name (string).
-	 * @param array data to be inserted (column name=>column value). If a key is not a valid column name, the corresponding value will be ignored.
-	 * @return TDbCommand insert command
-	 */
-	public function createInsertCommand($table,$data)
-	{
-		$this->ensureTable($table);
-		$fields=array();
-		$values=array();
-		$placeholders=array();
-		foreach($data as $name=>$value)
-		{
-			if(($column=$table->getColumn($name))!==null && ($value!==null || $column->allowNull))
-			{
-				$fields[]=$column->rawName;
-				if($value instanceof TDbExpression)
-					$placeholders[]=(string)$value;
-				else
-				{
-					$placeholders[]=':'.$name;
-					$values[':'.$name]=$column->typecast($value);
-				}
-			}
-		}
-
-		$sql="INSERT INTO {$table->rawName} (".implode(', ',$fields).') VALUES ('.implode(', ',$placeholders).')';
-
-		if(is_string($table->primaryKey))
-		{
-			$sql.=" RETURNING ".$table->primaryKey." INTO :RETURN_ID";
-			$command=$this->getDbConnection()->createCommand($sql);
-			$command->bindParam(':RETURN_ID', $this->returnID, PDO::PARAM_INT, 12);
-			$table->sequenceName='RETURN_ID';
-		}
-		else
-			$command=$this->getDbConnection()->createCommand($sql);
-
-		foreach($values as $name=>$value)
-			$command->bindValue($name,$value);
-
-		return $command;
-	}
-}
diff --git a/framework/Db/Schema/oci/TOciSchema.php b/framework/Db/Schema/oci/TOciSchema.php
deleted file mode 100755
index 50de0626..00000000
--- a/framework/Db/Schema/oci/TOciSchema.php
+++ /dev/null
@@ -1,278 +0,0 @@
-<?php
-/**
- * TOciSchema class file.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbSchema');
-
-/**
- * TOciSchema is the class for retrieving metadata information from a PostgreSQL database.
- *
- * @author Ricardo Grana <qiang.xue@gmail.com>
- * @version $Id: TOciSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.oci
- * @since 1.0.5
- */
-class TOciSchema extends TDbSchema
-{
-	private $_defaultSchema = '';
-	private $_sequences=array();
-
-	/**
-	 * Quotes a table name for use in a query.
-	 * @param string table name
-	 * @return string the properly quoted table name
-	 */
-	public function quoteTableName($name)
-	{
-		return $name;
-	}
-
-	/**
-	 * Quotes a column name for use in a query.
-	 * @param string column name
-	 * @return string the properly quoted column name
-	 */
-	public function quoteColumnName($name)
-	{
-		return $name;
-	}
-
-	/**
-	 * Creates a command builder for the database.
-	 * This method may be overridden by child classes to create a DBMS-specific command builder.
-	 * @return TDbCommandBuilder command builder instance
-	 */
-	protected function createCommandBuilder()
-	{
-		return new TOciCommandBuilder($this);
-	}
-
-	/**
-     * @param string default schema.
-     */
-    public function setDefaultSchema($schema)
-    {
-		$this->_defaultSchema=$schema;
-    }
-
-    /**
-     * @return string default schema.
-     */
-    public function getDefaultSchema()
-    {
-		if (!strlen($this->_defaultSchema))
-		{
-			$this->setDefaultSchema(strtoupper($this->getDbConnection()->username));
-		}
-
-		return $this->_defaultSchema;
-    }
-
-    /**
-     * @param string table name with optional schema name prefix, uses default schema name prefix is not provided.
-     * @return array tuple as ($schemaName,$tableName)
-     */
-    protected function getSchemaTableName($table)
-    {
-		$table = strtoupper($table);
-		if(count($parts= explode('.', str_replace('"','',$table))) > 1)
-			return array($parts[0], $parts[1]);
-		else
-			return array($this->getDefaultSchema(),$parts[0]);
-    }
-
-	/**
-	 * Creates a table instance representing the metadata for the named table.
-	 * @return TDbTableSchema driver dependent table metadata.
-	 */
-	protected function createTable($name)
-	{
-		$table=new TOciTableSchema;
-		$this->resolveTableNames($table,$name);
-
-		if(!$this->findColumns($table))
-			return null;
-		$this->findConstraints($table);
-
-		return $table;
-	}
-
-	/**
-	 * Generates various kinds of table names.
-	 * @param TOciTableSchema the table instance
-	 * @param string the unquoted table name
-	 */
-	protected function resolveTableNames($table,$name)
-	{
-		$parts=explode('.',str_replace('"','',$name));
-		if(isset($parts[1]))
-		{
-			$schemaName=$parts[0];
-			$tableName=$parts[1];
-		}
-		else
-		{
-			$schemaName=$this->getDefaultSchema();
-			$tableName=$parts[0];
-		}
-
-		$table->name=$tableName;
-		$table->schemaName=$schemaName;
-		if($schemaName===$this->getDefaultSchema())
-			$table->rawName=$this->quoteTableName($tableName);
-		else
-			$table->rawName=$this->quoteTableName($schemaName).'.'.$this->quoteTableName($tableName);
-	}
-
-	/**
-	 * Collects the table column metadata.
-	 * @param TOciTableSchema the table metadata
-	 * @return boolean whether the table exists in the database
-	 */
-	protected function findColumns($table)
-	{
-		list($schemaName,$tableName) = $this->getSchemaTableName($table->name);
-
-		$sql=<<<EOD
-SELECT a.column_name, a.data_type ||
-    case
-        when data_precision is not null
-            then '(' || a.data_precision ||
-                    case when a.data_scale > 0 then ',' || a.data_scale else '' end
-                || ')'
-        when data_type = 'DATE' then ''
-        else '(' || to_char(a.data_length) || ')'
-    end as data_type,
-    a.nullable, a.data_default,
-    (   SELECT D.constraint_type
-        FROM ALL_CONS_COLUMNS C
-        inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
-        WHERE C.OWNER = B.OWNER
-           and C.table_name = B.object_name
-           and C.column_name = A.column_name
-           and D.constraint_type = 'P') as Key
-FROM ALL_TAB_COLUMNS A
-inner join ALL_OBJECTS B ON b.owner = a.owner and ltrim(B.OBJECT_NAME) = ltrim(A.TABLE_NAME)
-WHERE
-    a.owner = '{$schemaName}'
-	and b.object_type = 'TABLE'
-	and b.object_name = '{$tableName}'
-ORDER by a.column_id
-EOD;
-
-		$command=$this->getDbConnection()->createCommand($sql);
-
-		if(($columns=$command->queryAll())===array()){
-			return false;
-		}
-
-		foreach($columns as $column)
-		{
-			$c=$this->createColumn($column);
-
-			$table->columns[$c->name]=$c;
-			if($c->isPrimaryKey)
-			{
-				if($table->primaryKey===null)
-					$table->primaryKey=$c->name;
-				else if(is_string($table->primaryKey))
-					$table->primaryKey=array($table->primaryKey,$c->name);
-				else
-					$table->primaryKey[]=$c->name;
-			}
-		}
-		return true;
-	}
-
-	/**
-	 * Creates a table column.
-	 * @param array column metadata
-	 * @return TDbColumnSchema normalized column metadata
-	 */
-	protected function createColumn($column)
-	{
-		$c=new TOciColumnSchema;
-		$c->name=$column['COLUMN_NAME'];
-		$c->rawName=$this->quoteColumnName($c->name);
-		$c->allowNull=$column['NULLABLE']==='Y';
-		$c->isPrimaryKey=strpos($column['KEY'],'P')!==false;
-		$c->isForeignKey=false;
-		$c->init($column['DATA_TYPE'],$column['DATA_DEFAULT']);
-
-		return $c;
-	}
-
-	/**
-	 * Collects the primary and foreign key column details for the given table.
-	 * @param TOciTableSchema the table metadata
-	 */
-	protected function findConstraints($table)
-	{
-		$sql=<<<EOD
-		SELECT D.constraint_type, C.COLUMN_NAME, C.position, D.r_constraint_name,
-                E.table_name as table_ref, f.column_name as column_ref
-        FROM ALL_CONS_COLUMNS C
-        inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
-        left join ALL_constraints E on E.OWNER = D.r_OWNER and E.constraint_name = D.r_constraint_name
-        left join ALL_cons_columns F on F.OWNER = E.OWNER and F.constraint_name = E.constraint_name and F.position = c.position
-        WHERE C.OWNER = '{$table->schemaName}'
-           and C.table_name = '{$table->name}'
-           and D.constraint_type <> 'P'
-        order by d.constraint_name, c.position
-EOD;
-		$command=$this->getDbConnection()->createCommand($sql);
-		foreach($command->queryAll() as $row)
-		{
-			if($row['constraint_type']==='R')   // foreign key
-			{
-				$name = $row["COLUMN_NAME"];
-				$table->foreignKeys[$name]=array($row["TABLE_REF"], array($row["COLUMN_REF"]));
-				if(isset($table->columns[$name]))
-					$table->columns[$name]->isForeignKey=true;
-			}
-
-		}
-	}
-
-
-	/**
-	 * Returns all table names in the database.
-	 * @return array all table names in the database.
-	 */
-	protected function findTableNames($schema='')
-	{
-		if($schema==='')
-		{
-			$sql=<<<EOD
-SELECT table_name, '{$schema}' as table_schema FROM user_tables
-EOD;
-			$command=$this->getDbConnection()->createCommand($sql);
-		}
-		else
-		{
-			$sql=<<<EOD
-SELECT object_name as table_name, owner as table_schema FROM all_objects
-WHERE object_type = 'TABLE' AND owner=:schema
-EOD;
-			$command=$this->getDbConnection()->createCommand($sql);
-			$command->bindParam(':schema',$schema);
-		}
-
-		$rows=$command->queryAll();
-		$names=array();
-		foreach($rows as $row)
-		{
-			if($schema===$this->getDefaultSchema())
-				$names[]=$row['table_name'];
-			else
-				$names[]=$row['schema_name'].'.'.$row['table_name'];
-		}
-		return $names;
-	}
-}
diff --git a/framework/Db/Schema/oci/TOciTableSchema.php b/framework/Db/Schema/oci/TOciTableSchema.php
deleted file mode 100755
index 9fe73624..00000000
--- a/framework/Db/Schema/oci/TOciTableSchema.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-/**
- * TOciTableSchema class file.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbTableSchame');
-
-/**
- * TOciTableSchema represents the metadata for a Ora table.
- *
- * @author Ricardo Grana <rickgrana@yahoo.com.br>
- * @version $Id: TOciTableSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.oci
- * @since 1.0.5
- */
-class TOciTableSchema extends TDbTableSchema
-{
-	/**
-	 * @var string name of the schema (database) that this table belongs to.
-	 * Defaults to null, meaning no schema (or the current database).
-	 */
-	public $schemaName;
-}
diff --git a/framework/Db/Schema/pgsql/TPgsqlColumnSchema.php b/framework/Db/Schema/pgsql/TPgsqlColumnSchema.php
deleted file mode 100755
index 3677cd44..00000000
--- a/framework/Db/Schema/pgsql/TPgsqlColumnSchema.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-/**
- * TPgsqlColumnSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbColumnSchema');
-
-/**
- * TPgsqlColumnSchema class describes the column meta data of a PostgreSQL table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TPgsqlColumnSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.pgsql
- * @since 1.0
- */
-class TPgsqlColumnSchema extends TDbColumnSchema
-{
-	/**
-	 * Extracts the PHP type from DB type.
-	 * @param string DB type
-	 */
-	protected function extractType($dbType)
-	{
-		if(strpos($dbType,'integer')!==false || strpos($dbType,'oid')===0)
-			$this->type='integer';
-		else if(strpos($dbType,'bool')!==false)
-			$this->type='boolean';
-		else if(preg_match('/(real|float|double)/',$dbType))
-			$this->type='double';
-		else
-			$this->type='string';
-	}
-
-	/**
-	 * Extracts the default value for the column.
-	 * The value is typecasted to correct PHP type.
-	 * @param mixed the default value obtained from metadata
-	 */
-	protected function extractDefault($defaultValue)
-	{
-		if($defaultValue==='true')
-			$this->defaultValue=true;
-		else if($defaultValue==='false')
-			$this->defaultValue=false;
-		else if(strpos($defaultValue,'nextval')===0)
-			$this->defaultValue=null;
-		else if(preg_match('/\'(.*)\'::/',$defaultValue,$matches))
-			$this->defaultValue=$this->typecast(str_replace("''","'",$matches[1]));
-		else if(preg_match('/^-?\d+(\.\d*)?$/',$defaultValue,$matches))
-			$this->defaultValue=$this->typecast($defaultValue);
-		// else is null
-	}
-}
diff --git a/framework/Db/Schema/pgsql/TPgsqlSchema.php b/framework/Db/Schema/pgsql/TPgsqlSchema.php
deleted file mode 100755
index 5f009208..00000000
--- a/framework/Db/Schema/pgsql/TPgsqlSchema.php
+++ /dev/null
@@ -1,284 +0,0 @@
-<?php
-/**
- * TPgsqlSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbSchema');
-
-/**
- * TPgsqlSchema is the class for retrieving metadata information from a PostgreSQL database.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TPgsqlSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.pgsql
- * @since 1.0
- */
-class TPgsqlSchema extends TDbSchema
-{
-	const DEFAULT_SCHEMA='public';
-	private $_sequences=array();
-
-	/**
-	 * Quotes a table name for use in a query.
-	 * @param string table name
-	 * @return string the properly quoted table name
-	 */
-	public function quoteTableName($name)
-	{
-		return '"'.$name.'"';
-	}
-
-	/**
-	 * Creates a table instance representing the metadata for the named table.
-	 * @return TDbTableSchema driver dependent table metadata.
-	 */
-	protected function createTable($name)
-	{
-		$table=new TPgsqlTableSchema;
-		$this->resolveTableNames($table,$name);
-		if(!$this->findColumns($table))
-			return null;
-		$this->findConstraints($table);
-
-		if(is_string($table->primaryKey) && isset($this->_sequences[$table->primaryKey]))
-			$table->sequenceName=$this->_sequences[$table->primaryKey];
-
-		return $table;
-	}
-
-	/**
-	 * Generates various kinds of table names.
-	 * @param TPgsqlTableSchema the table instance
-	 * @param string the unquoted table name
-	 */
-	protected function resolveTableNames($table,$name)
-	{
-		$parts=explode('.',str_replace('"','',$name));
-		if(isset($parts[1]))
-		{
-			$schemaName=$parts[0];
-			$tableName=$parts[1];
-		}
-		else
-		{
-			$schemaName=self::DEFAULT_SCHEMA;
-			$tableName=$parts[0];
-		}
-
-		$table->name=$tableName;
-		$table->schemaName=$schemaName;
-		if($schemaName===self::DEFAULT_SCHEMA)
-			$table->rawName=$this->quoteTableName($tableName);
-		else
-			$table->rawName=$this->quoteTableName($schemaName).'.'.$this->quoteTableName($tableName);
-	}
-
-	/**
-	 * Collects the table column metadata.
-	 * @param TPgsqlTableSchema the table metadata
-	 * @return boolean whether the table exists in the database
-	 */
-	protected function findColumns($table)
-	{
-		$sql=<<<EOD
-SELECT a.attname, LOWER(format_type(a.atttypid, a.atttypmod)) AS type, d.adsrc, a.attnotnull, a.atthasdef
-FROM pg_attribute a LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum
-WHERE a.attnum > 0 AND NOT a.attisdropped
-	AND a.attrelid = (SELECT oid FROM pg_catalog.pg_class WHERE relname=:table
-		AND relnamespace = (SELECT oid FROM pg_catalog.pg_namespace WHERE nspname = :schema))
-ORDER BY a.attnum
-EOD;
-		$command=$this->getDbConnection()->createCommand($sql);
-		$command->bindValue(':table',$table->name);
-		$command->bindValue(':schema',$table->schemaName);
-
-		if(($columns=$command->queryAll())===array())
-			return false;
-
-		foreach($columns as $column)
-		{
-			$c=$this->createColumn($column);
-			$table->columns[$c->name]=$c;
-
-			if(stripos($column['adsrc'],'nextval')===0 && preg_match('/nextval\([^\']*\'([^\']+)\'[^\)]*\)/i',$column['adsrc'],$matches))
-			{
-				if(strpos($matches[1],'.')!==false || $table->schemaName===self::DEFAULT_SCHEMA)
-					$this->_sequences[$c->name]=$matches[1];
-				else
-					$this->_sequences[$c->name]=$table->schemaName.'.'.$matches[1];
-			}
-		}
-		return true;
-	}
-
-	/**
-	 * Creates a table column.
-	 * @param array column metadata
-	 * @return TDbColumnSchema normalized column metadata
-	 */
-	protected function createColumn($column)
-	{
-		$c=new TPgsqlColumnSchema;
-		$c->name=$column['attname'];
-		$c->rawName=$this->quoteColumnName($c->name);
-		$c->allowNull=!$column['attnotnull'];
-		$c->isPrimaryKey=false;
-		$c->isForeignKey=false;
-
-		$c->init($column['type'],$column['atthasdef'] ? $column['adsrc'] : null);
-
-		return $c;
-	}
-
-	/**
-	 * Collects the primary and foreign key column details for the given table.
-	 * @param TPgsqlTableSchema the table metadata
-	 */
-	protected function findConstraints($table)
-	{
-		$sql=<<<EOD
-SELECT conname, consrc, contype, indkey FROM (
-	SELECT
-		conname,
-		CASE WHEN contype='f' THEN
-			pg_catalog.pg_get_constraintdef(oid)
-		ELSE
-			'CHECK (' || consrc || ')'
-		END AS consrc,
-		contype,
-		conrelid AS relid,
-		NULL AS indkey
-	FROM
-		pg_catalog.pg_constraint
-	WHERE
-		contype IN ('f', 'c')
-	UNION ALL
-	SELECT
-		pc.relname,
-		NULL,
-		CASE WHEN indisprimary THEN
-				'p'
-		ELSE
-				'u'
-		END,
-		pi.indrelid,
-		indkey
-	FROM
-		pg_catalog.pg_class pc,
-		pg_catalog.pg_index pi
-	WHERE
-		pc.oid=pi.indexrelid
-		AND EXISTS (
-			SELECT 1 FROM pg_catalog.pg_depend d JOIN pg_catalog.pg_constraint c
-			ON (d.refclassid = c.tableoid AND d.refobjid = c.oid)
-			WHERE d.classid = pc.tableoid AND d.objid = pc.oid AND d.deptype = 'i' AND c.contype IN ('u', 'p')
-	)
-) AS sub
-WHERE relid = (SELECT oid FROM pg_catalog.pg_class WHERE relname=:table
-	AND relnamespace = (SELECT oid FROM pg_catalog.pg_namespace
-	WHERE nspname=:schema))
-EOD;
-		$command=$this->getDbConnection()->createCommand($sql);
-		$command->bindValue(':table',$table->name);
-		$command->bindValue(':schema',$table->schemaName);
-		foreach($command->queryAll() as $row)
-		{
-			if($row['contype']==='p') // primary key
-				$this->findPrimaryKey($table,$row['indkey']);
-			else if($row['contype']==='f') // foreign key
-				$this->findForeignKey($table,$row['consrc']);
-		}
-	}
-
-	/**
-	 * Collects primary key information.
-	 * @param TPgsqlTableSchema the table metadata
-	 * @param string pgsql primary key index list
-	 */
-	protected function findPrimaryKey($table,$indices)
-	{
-		$indices=implode(', ',preg_split('/\s+/',$indices));
-		$sql=<<<EOD
-SELECT attnum, attname FROM pg_catalog.pg_attribute WHERE
-	attrelid=(
-		SELECT oid FROM pg_catalog.pg_class WHERE relname=:table AND relnamespace=(
-			SELECT oid FROM pg_catalog.pg_namespace WHERE nspname=:schema
-		)
-	)
-    AND attnum IN ({$indices})
-EOD;
-		$command=$this->getDbConnection()->createCommand($sql);
-		$command->bindValue(':table',$table->name);
-		$command->bindValue(':schema',$table->schemaName);
-		foreach($command->queryAll() as $row)
-		{
-			$name=$row['attname'];
-			if(isset($table->columns[$name]))
-			{
-				$table->columns[$name]->isPrimaryKey=true;
-				if($table->primaryKey===null)
-					$table->primaryKey=$name;
-				else if(is_string($table->primaryKey))
-					$table->primaryKey=array($table->primaryKey,$name);
-				else
-					$table->primaryKey[]=$name;
-			}
-		}
-	}
-
-	/**
-	 * Collects foreign key information.
-	 * @param TPgsqlTableSchema the table metadata
-	 * @param string pgsql foreign key definition
-	 */
-	protected function findForeignKey($table,$src)
-	{
-		$matches=array();
-		$brackets='\(([^\)]+)\)';
-		$pattern="/FOREIGN\s+KEY\s+{$brackets}\s+REFERENCES\s+([^\(]+){$brackets}/i";
-		if(preg_match($pattern,str_replace('"','',$src),$matches))
-		{
-			$keys=preg_split('/,\s+/', $matches[1]);
-			$tableName=$matches[2];
-			$fkeys=preg_split('/,\s+/', $matches[3]);
-			foreach($keys as $i=>$key)
-			{
-				$table->foreignKeys[$key]=array($tableName,$fkeys[$i]);
-				if(isset($table->columns[$key]))
-					$table->columns[$key]->isForeignKey=true;
-			}
-		}
-	}
-
-	/**
-	 * Returns all table names in the database.
-	 * @return array all table names in the database.
-	 * @since 1.0.2
-	 */
-	protected function findTableNames($schema='')
-	{
-		if($schema==='')
-			$schema=self::DEFAULT_SCHEMA;
-		$sql=<<<EOD
-SELECT table_name, table_schema FROM information_schema.tables
-WHERE table_schema=:schema
-EOD;
-		$command=$this->getDbConnection()->createCommand($sql);
-		$command->bindParam(':schema',$schema);
-		$rows=$command->queryAll();
-		$names=array();
-		foreach($rows as $row)
-		{
-			if($schema===self::DEFAULT_SCHEMA)
-				$names[]=$row['table_name'];
-			else
-				$names[]=$row['schema_name'].'.'.$row['table_name'];
-		}
-		return $names;
-	}
-}
diff --git a/framework/Db/Schema/pgsql/TPgsqlTableSchema.php b/framework/Db/Schema/pgsql/TPgsqlTableSchema.php
deleted file mode 100755
index 9c14da28..00000000
--- a/framework/Db/Schema/pgsql/TPgsqlTableSchema.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-/**
- * TPgsqlTable class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbTableSchema');
-
-/**
- * TPgsqlTable represents the metadata for a PostgreSQL table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TPgsqlTableSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.pgsql
- * @since 1.0
- */
-class TPgsqlTableSchema extends TDbTableSchema
-{
-	/**
-	 * @var string name of the schema that this table belongs to.
-	 */
-	public $schemaName;
-}
diff --git a/framework/Db/Schema/sqlite/TSqliteColumnSchema.php b/framework/Db/Schema/sqlite/TSqliteColumnSchema.php
deleted file mode 100755
index ca6858eb..00000000
--- a/framework/Db/Schema/sqlite/TSqliteColumnSchema.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-/**
- * TSqliteColumnSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbColumnSchema');
-
-/**
- * TSqliteColumnSchema class describes the column meta data of a SQLite table.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TSqliteColumnSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.sqlite
- * @since 1.0
- */
-class TSqliteColumnSchema extends TDbColumnSchema
-{
-	/**
-	 * Extracts the default value for the column.
-	 * The value is typecasted to correct PHP type.
-	 * @param mixed the default value obtained from metadata
-	 */
-	protected function extractDefault($defaultValue)
-	{
-		if($this->type==='string') // PHP 5.2.6 adds single quotes while 5.2.0 doesn't
-			$this->defaultValue=trim($defaultValue,"'\"");
-		else
-			$this->defaultValue=$this->typecast($defaultValue);
-	}
-}
diff --git a/framework/Db/Schema/sqlite/TSqliteCommandBuilder.php b/framework/Db/Schema/sqlite/TSqliteCommandBuilder.php
deleted file mode 100755
index 69ffd8a8..00000000
--- a/framework/Db/Schema/sqlite/TSqliteCommandBuilder.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-/**
- * TSqliteCommandBuilder class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbCommandBuilder');
-
-/**
- * TSqliteCommandBuilder provides basic methods to create query commands for SQLite tables.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TSqliteCommandBuilder.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.sqlite
- * @since 1.0
- */
-class TSqliteCommandBuilder extends TDbCommandBuilder
-{
-	/**
-	 * Generates the expression for selecting rows with specified composite key values.
-	 * This method is overridden because SQLite does not support the default
-	 * IN expression with composite columns.
-	 * @param TDbTableSchema the table schema
-	 * @param array list of primary key values to be selected within
-	 * @param string column prefix (ended with dot)
-	 * @return string the expression for selection
-	 * @since 1.0.4
-	 */
-	protected function createCompositeInCondition($table,$values,$prefix)
-	{
-		$keyNames=array();
-		foreach(array_keys($values[0]) as $name)
-			$keyNames[]=$prefix.$table->columns[$name]->rawName;
-		$vs=array();
-		foreach($values as $value)
-			$vs[]=implode("||','||",$value);
-		return implode("||','||",$keyNames).' IN ('.implode(', ',$vs).')';
-	}
-}
diff --git a/framework/Db/Schema/sqlite/TSqliteSchema.php b/framework/Db/Schema/sqlite/TSqliteSchema.php
deleted file mode 100755
index 0e3d4f9a..00000000
--- a/framework/Db/Schema/sqlite/TSqliteSchema.php
+++ /dev/null
@@ -1,134 +0,0 @@
-<?php
-/**
- * TSqliteSchema class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using('System.Db.Schema.TDbSchema');
-prado::using('System.Db.Schema.TDbTableSchema');
-prado::using('System.Db.Schema.sqlite.TSqliteColumnSchema');
-prado::using('System.Db.Schema.sqlite.TSqliteCommandBuilder');
-
-/**
- * TSqliteSchema is the class for retrieving metadata information from a SQLite (2/3) database.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id: TSqliteSchema.php 2679 2009-06-15 07:49:42Z Christophe.Boulain $
- * @package System.Db.Schema.sqlite
- * @since 1.0
- */
-class TSqliteSchema extends TDbSchema
-{
-	/**
-	 * Returns all table names in the database.
-	 * @param string the schema of the tables. This is not used for sqlite database.
-	 * @return array all table names in the database.
-	 * @since 1.0.2
-	 */
-	protected function findTableNames($schema='')
-	{
-		$sql="SELECT DISTINCT tbl_name FROM sqlite_master WHERE tbl_name<>'sqlite_sequence'";
-		return $this->getDbConnection()->createCommand($sql)->queryColumn();
-	}
-
-	/**
-	 * Creates a command builder for the database.
-	 * @return TSqliteCommandBuilder command builder instance
-	 */
-	protected function createCommandBuilder()
-	{
-		return new TSqliteCommandBuilder($this);
-	}
-
-	/**
-	 * Creates a table instance representing the metadata for the named table.
-	 * @return TDbTableSchema driver dependent table metadata. Null if the table does not exist.
-	 */
-	protected function createTable($name)
-	{
-		$db=$this->getDbConnection();
-
-		$table=new TDbTableSchema;
-		$table->name=$name;
-		$table->rawName=$this->quoteTableName($name);
-
-		if($this->findColumns($table))
-		{
-			$this->findConstraints($table);
-			return $table;
-		}
-		else
-			return null;
-	}
-
-	/**
-	 * Collects the table column metadata.
-	 * @param TDbTableSchema the table metadata
-	 * @return boolean whether the table exists in the database
-	 */
-	protected function findColumns($table)
-	{
-		$sql="PRAGMA table_info({$table->rawName})";
-		$columns=$this->getDbConnection()->createCommand($sql)->queryAll();
-		if(empty($columns))
-			return false;
-
-		foreach($columns as $column)
-		{
-			$c=$this->createColumn($column);
-			$table->columns[$c->name]=$c;
-			if($c->isPrimaryKey)
-			{
-				if($table->primaryKey===null)
-					$table->primaryKey=$c->name;
-				else if(is_string($table->primaryKey))
-					$table->primaryKey=array($table->primaryKey,$c->name);
-				else
-					$table->primaryKey[]=$c->name;
-			}
-		}
-		if(is_string($table->primaryKey) && !strncasecmp($table->columns[$table->primaryKey]->dbType,'int',3))
-			$table->sequenceName='';
-
-		return true;
-	}
-
-	/**
-	 * Collects the foreign key column details for the given table.
-	 * @param TDbTableSchema the table metadata
-	 */
-	protected function findConstraints($table)
-	{
-		$foreignKeys=array();
-		$sql="PRAGMA foreign_key_list({$table->rawName})";
-		$keys=$this->getDbConnection()->createCommand($sql)->queryAll();
-		foreach($keys as $key)
-		{
-			$column=$table->columns[$key['from']];
-			$column->isForeignKey=true;
-			$foreignKeys[$key['from']]=array($key['table'],$key['to']);
-		}
-		$table->foreignKeys=$foreignKeys;
-	}
-
-	/**
-	 * Creates a table column.
-	 * @param array column metadata
-	 * @return TDbColumnSchema normalized column metadata
-	 */
-	protected function createColumn($column)
-	{
-		$c=new TSqliteColumnSchema;
-		$c->name=$column['name'];
-		$c->rawName=$this->quoteColumnName($c->name);
-		$c->allowNull=!$column['notnull'];
-		$c->isPrimaryKey=$column['pk']!=0;
-		$c->isForeignKey=false;
-		$c->init(strtolower($column['type']),$column['dflt_value']);
-		return $c;
-	}
-}
diff --git a/framework/Db/TDataSourceConfig.php b/framework/Db/TDataSourceConfig.php
deleted file mode 100755
index 56d87bc0..00000000
--- a/framework/Db/TDataSourceConfig.php
+++ /dev/null
@@ -1,168 +0,0 @@
-<?php
-/**
- * TDataSourceConfig class file.
- *
- * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com
- * @link http://www.pradosoft.com/
- * @copyright Copyright &copy; 2005-2009 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Data
- */
-
-Prado::using('System.Db.TDbConnection');
-
-/**
- * TDataSourceConfig module class provides <module> configuration for database connections.
- *
- * Example usage: mysql connection
- * <code>
- * <modules>
- * 	<module id="db1">
- * 		<database ConnectionString="mysqli:host=localhost;dbname=test"
- * 			username="dbuser" password="dbpass" />
- * 	</module>
- * </modules>
- * </code>
- *
- * Usage in php:
- * <code>
- * class Home extends TPage
- * {
- * 		function onLoad($param)
- * 		{
- * 			$db = $this->Application->Modules['db1']->DbConnection;
- * 			$db->createCommand('...'); //...
- * 		}
- * }
- * </code>
- *
- * The properties of <connection> are those of the class TDbConnection.
- * Set {@link setConnectionClass} attribute for a custom database connection class
- * that extends the TDbConnection class.
- *
- * @author Wei Zhuo <weizho[at]gmail[dot]com>
- * @version $Id$
- * @package System.Data
- * @since 3.1
- */
-class TDataSourceConfig extends TModule
-{
-	private $_connID='';
-	private $_conn;
-	private $_connClass='System.Db.TDbConnection';
-
-	/**
-	 * Initalize the database connection properties from attributes in <database> tag.
-	 * @param TXmlDocument xml configuration.
-	 */
-	public function init($xml)
-	{
-		if($this->getApplication()->getConfigurationType()==TApplication::CONFIG_TYPE_PHP)
-		{
-			if(isset($xml['database']) && is_array($xml['database']))
-			{
-				$db=$this->getDbConnection();
-				foreach($xml['database'] as $name=>$value)
-					$db->setSubProperty($name,$value);
-			}
-		}
-		else
-		{
-			if($prop=$xml->getElementByTagName('database'))
-			{
-				$db=$this->getDbConnection();
-				foreach($prop->getAttributes() as $name=>$value)
-					$db->setSubproperty($name,$value);
-			}
-		}
-	}
-
-	/**
-	 * The module ID of another TDataSourceConfig. The {@link getDbConnection DbConnection}
-	 * property of this configuration will equal to {@link getDbConnection DbConnection}
-	 * of the given TDataSourceConfig module.
-	 * @param string module ID.
-	 */
-	public function setConnectionID($value)
-	{
-		$this->_connID=$value;
-	}
-
-	/**
-	 * @return string connection module ID.
-	 */
-	public function getConnectionID()
-	{
-		return $this->_connID;
-	}
-
-	/**
-	 * Gets the TDbConnection from another module if {@link setConnectionID ConnectionID}
-	 * is supplied and valid. Otherwise, a connection of type given by
-	 * {@link setConnectionClass ConnectionClass} is created.
-	 * @return TDbConnection database connection.
-	 */
-	public function getDbConnection()
-	{
-		if($this->_conn===null)
-		{
-			if($this->_connID!=='')
-				$this->_conn = $this->findConnectionByID($this->getConnectionID());
-			else
-				$this->_conn = Prado::createComponent($this->getConnectionClass());
-		}
-		return $this->_conn;
-	}
-
-	/**
-	 * Alias for getDbConnection().
-	 * @return TDbConnection database connection.
-	 */
-	public function getDatabase()
-	{
-		return $this->getDbConnection();
-	}
-
-	/**
-	 * @param string Database connection class name to be created.
-	 */
-	public function getConnectionClass()
-	{
-		return $this->_connClass;
-	}
-
-	/**
-	 * The database connection class name to be created when {@link getDbConnection}
-	 * method is called <b>and</b> {@link setConnectionID ConnectionID} is null. The
-	 * {@link setConnectionClass ConnectionClass} property must be set before
-	 * calling {@link getDbConnection} if you wish to create the connection using the
-	 * given class name.
-	 * @param string Database connection class name.
-	 * @throws TConfigurationException when database connection is already established.
-	 */
-	public function setConnectionClass($value)
-	{
-		if($this->_conn!==null)
-			throw new TConfigurationException('datasource_dbconnection_exists', $value);
-		$this->_connClass=$value;
-	}
-
-	/**
-	 * Finds the database connection instance from the Application modules.
-	 * @param string Database connection module ID.
-	 * @return TDbConnection database connection.
-	 * @throws TConfigurationException when module is not of TDbConnection or TDataSourceConfig.
-	 */
-	protected function findConnectionByID($id)
-	{
-		$conn = $this->getApplication()->getModule($id);
-		if($conn instanceof TDbConnection)
-			return $conn;
-		else if($conn instanceof TDataSourceConfig)
-			return $conn->getDbConnection();
-		else
-			throw new TConfigurationException('datasource_dbconnection_invalid',$id);
-	}
-}
diff --git a/framework/Db/TDbCommand.php b/framework/Db/TDbCommand.php
deleted file mode 100755
index 6c3a0074..00000000
--- a/framework/Db/TDbCommand.php
+++ /dev/null
@@ -1,340 +0,0 @@
-<?php
-/**
- * This file contains the TDbCommand class.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * TDbCommand represents an SQL statement to execute against a database.
- *
- * It is usually created by calling {@link TDbConnection::createCommand}.
- * The SQL statement to be executed may be set via {@link setText Text}.
- *
- * To execute a non-query SQL (such as insert, delete, update), call
- * {@link execute}. To execute an SQL statement that returns result data set
- * (such as SELECT), use {@link query} or its convenient versions {@link queryRow},
- * {@link queryColumn}, or {@link queryScalar}.
- *
- * If an SQL statement returns results (such as a SELECT SQL), the results
- * can be accessed via the returned {@link TDbDataReader}.
- *
- * TDbCommand supports SQL statment preparation and parameter binding.
- * Call {@link bindParam} to bind a PHP variable to a parameter in SQL.
- * Call {@link bindValue} to bind a value to an SQL parameter.
- * When binding a parameter, the SQL statement is automatically prepared.
- * You may also call {@link prepare} to explicitly prepare an SQL statement.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package system.db
- * @since 1.0
- */
-class TDbCommand extends TComponent
-{
-	private $_connection;
-	private $_text='';
-	private $_statement=null;
-	private $_params;
-
-	/**
-	 * Constructor.
-	 * @param TDbConnection the database connection
-	 * @param string the SQL statement to be executed
-	 */
-	public function __construct(TDbConnection $connection,$text)
-	{
-		$this->_connection=$connection;
-		$this->setText($text);
-	}
-
-	/**
-	 * Set the statement to null when serializing.
-	 */
-	public function __sleep()
-	{
-		$this->_statement=null;
-		return array_keys(get_object_vars($this));
-	}
-
-	/**
-	 * @return string the SQL statement to be executed
-	 */
-	public function getText()
-	{
-		return $this->_text;
-	}
-
-	/**
-	 * Specifies the SQL statement to be executed.
-	 * Any previous execution will be terminated or cancel.
-	 * @param string the SQL statement to be executed
-	 */
-	public function setText($value)
-	{
-		$this->_text=$value;
-		$this->cancel();
-	}
-
-	/**
-	 * @return TDbConnection the connection associated with this command
-	 */
-	public function getConnection()
-	{
-		return $this->_connection;
-	}
-
-	/**
-	 * @return PDOStatement the underlying PDOStatement for this command
-	 * It could be null if the statement is not prepared yet.
-	 */
-	public function getPdoStatement()
-	{
-		return $this->_statement;
-	}
-
-	/**
-	 * Prepares the SQL statement to be executed.
-	 * For complex SQL statement that is to be executed multiple times,
-	 * this may improve performance.
-	 * For SQL statement with binding parameters, this method is invoked
-	 * automatically.
-	 */
-	public function prepare()
-	{
-		if($this->_statement==null)
-		{
-			try
-			{
-				$this->_statement=$this->getConnection()->getPdoInstance()->prepare($this->getText());
-				$this->_params=array();
-			}
-			catch(Exception $e)
-			{
-				Prado::log('Error in preparing SQL: '.$this->getText(),TLogger::ERROR,'system.Db.TDbCommand');
-				throw new TDbException('TDbCommand failed to prepare the SQL statement: {0}',
-					$e->getMessage());
-			}
-		}
-	}
-
-	/**
-	 * Cancels the execution of the SQL statement.
-	 */
-	public function cancel()
-	{
-		$this->_statement=null;
-	}
-
-	/**
-	 * Binds a parameter to the SQL statement to be executed.
-	 * @param mixed Parameter identifier. For a prepared statement
-	 * using named placeholders, this will be a parameter name of
-	 * the form :name. For a prepared statement using question mark
-	 * placeholders, this will be the 1-indexed position of the parameter.
-	 * @param mixed Name of the PHP variable to bind to the SQL statement parameter
-	 * @param int SQL data type of the parameter. If null, the type is determined by the PHP type of the value.
-	 * @param int length of the data type
-	 * @see http://www.php.net/manual/en/function.PDOStatement-bindParam.php
-	 */
-	public function bindParameter($name, &$value, $dataType=null, $length=null)
-	{
-		$this->prepare();
-		if($dataType===null)
-			$this->_statement->bindParam($name,$value,$this->_connection->getPdoType(gettype($value)));
-		else if($length===null)
-			$this->_statement->bindParam($name,$value,$dataType);
-		else
-			$this->_statement->bindParam($name,$value,$dataType,$length);
-		if($this->_connection->enableParamLogging)
-			$this->_params[]=$name.'=['.gettype($value).']';
-	}
-
-
-	/**
-	 * Binds a value to a parameter.
-	 * @param mixed Parameter identifier. For a prepared statement
-	 * using named placeholders, this will be a parameter name of
-	 * the form :name. For a prepared statement using question mark
-	 * placeholders, this will be the 1-indexed position of the parameter.
-	 * @param mixed The value to bind to the parameter
-	 * @param int SQL data type of the parameter. If null, the type is determined by the PHP type of the value.
-	 * @see http://www.php.net/manual/en/function.PDOStatement-bindValue.php
-	 */
-	public function bindValue($name, $value, $dataType=null)
-	{
-		$this->prepare();
-		if($dataType===null)
-			$this->_statement->bindValue($name,$value,$this->_connection->getPdoType(gettype($value)));
-		else
-			$this->_statement->bindValue($name,$value,$dataType);
-		if($this->_connection->enableParamLogging)
-			$this->_params[]=$name.'='.var_export($value,true);
-	}
-
-	/**
-	 * Executes the SQL statement.
-	 * This method is meant only for executing non-query SQL statement.
-	 * No result set will be returned.
-	 * @return integer number of rows affected by the execution.
-	 * @throws CException execution failed
-	 */
-	public function execute()
-	{
-		$params=$this->_connection->enableParamLogging && !empty($this->_params) ? '. Bind with parameter ' . implode(', ',$this->_params) : '';
-		Prado::trace('Executing SQL: '.$this->getText().$params,'system.Db.TDbCommand');
-		try
-		{
-			/*if($this->_connection->enableProfiling)
-				Yii::beginProfile('system.db.TDbCommand.execute('.$this->getText().')','system.db.TDbCommand.execute');
-			*/
-			if($this->_statement instanceof PDOStatement)
-			{
-				$this->_statement->execute();
-				$n=$this->_statement->rowCount();
-			}
-			else
-				$n=$this->getConnection()->getPdoInstance()->exec($this->getText());
-
-			/*if($this->_connection->enableProfiling)
-				Yii::endProfile('system.db.TDbCommand.execute('.$this->getText().')','system.db.TDbCommand.execute');
-			*/
-			return $n;
-		}
-		catch(Exception $e)
-		{
-			/*if($this->_connection->enableProfiling)
-				Yii::endProfile('system.db.TDbCommand.execute('.$this->getText().')','system.db.TDbCommand.execute');
-			 */
-			Prado::log('Error in executing SQL: '.$this->getText().$params,TLogger::ERROR,'system.db.TDbCommand');
-			throw new TDbException('TDbCommand failed to execute the SQL statement: {0}',
-				$e->getMessage());
-		}
-	}
-
-	/**
-	 * @return String prepared SQL text for debugging purposes.
-	 */
-	public function getDebugStatementText()
-	{
-		if(Prado::getApplication()->getMode() === TApplicationMode::Debug)
-		{
-			$params=$this->_connection->enableParamLogging && !empty($this->_params) ? '. Bind with parameter ' . implode(', ',$this->_params) : '';
-			return $this->_statement instanceof PDOStatement ?
-				$this->_statement->queryString.$params
-				: $this->getText().$params;
-
-		}
-	}
-
-	/**
-	 * Executes the SQL statement and returns query result.
-	 * This method is for executing an SQL query that returns result set.
-	 * @return TDbDataReader the reader object for fetching the query result
-	 * @throws CException execution failed
-	 */
-	public function query()
-	{
-		return $this->queryInternal('',0);
-	}
-
-	/**
-	 * Executes the SQL statement and returns all rows.
-	 * @param boolean whether each row should be returned as an associated array with
-	 * column names as the keys or the array keys are column indexes (0-based).
-	 * @return array all rows of the query result. Each array element is an array representing a row.
-	 * An empty array is returned if the query results in nothing.
-	 * @throws CException execution failed
-	 */
-	public function queryAll($fetchAssociative=true)
-	{
-		return $this->queryInternal('fetchAll',$fetchAssociative ? PDO::FETCH_ASSOC : PDO::FETCH_NUM);
-	}
-
-	/**
-	 * Executes the SQL statement and returns the first row of the result.
-	 * This is a convenient method of {@link query} when only the first row of data is needed.
-	 * @param boolean whether the row should be returned as an associated array with
-	 * column names as the keys or the array keys are column indexes (0-based).
-	 * @return array the first row of the query result, false if no result.
-	 * @throws CException execution failed
-	 */
-	public function queryRow($fetchAssociative=true)
-	{
-		return $this->queryInternal('fetch',$fetchAssociative ? PDO::FETCH_ASSOC : PDO::FETCH_NUM);
-	}
-
-	/**
-	 * Executes the SQL statement and returns the value of the first column in the first row of data.
-	 * This is a convenient method of {@link query} when only a single scalar
-	 * value is needed (e.g. obtaining the count of the records).
-	 * @return mixed the value of the first column in the first row of the query result. False is returned if there is no value.
-	 * @throws CException execution failed
-	 */
-	public function queryScalar()
-	{
-		$result=$this->queryInternal('fetchColumn',0);
-		if(is_resource($result) && get_resource_type($result)==='stream')
-			return stream_get_contents($result);
-		else
-			return $result;
-	}
-
-	/**
-	 * Executes the SQL statement and returns the first column of the result.
-	 * This is a convenient method of {@link query} when only the first column of data is needed.
-	 * Note, the column returned will contain the first element in each row of result.
-	 * @return array the first column of the query result. Empty array if no result.
-	 * @throws CException execution failed
-	 */
-	public function queryColumn()
-	{
-		return $this->queryInternal('fetchAll',PDO::FETCH_COLUMN);
-	}
-
-	/**
-	 * @param string method of PDOStatement to be called
-	 * @param mixed the first parameter to be passed to the method
-	 * @return mixed the method execution result
-	 */
-	private function queryInternal($method,$mode)
-	{
-		$params=$this->_connection->enableParamLogging && !empty($this->_params) ? '. Bind with parameter ' . implode(', ',$this->_params) : '';
-		Prado::trace('Querying SQL: '.$this->getText().$params,'system.Db.TDbCommand');
-		try
-		{
-			/*if($this->_connection->enableProfiling)
-				Yii::beginProfile('system.db.TDbCommand.query('.$this->getText().')','system.db.TDbCommand.query');
-			*/
-			if($this->_statement instanceof PDOStatement)
-				$this->_statement->execute();
-			else
-				$this->_statement=$this->getConnection()->getPdoInstance()->query($this->getText());
-			
-			if($method==='')
-				$result=new TDbDataReader($this);
-			else
-			{
-				$result=$this->_statement->{$method}($mode);
-				$this->_statement->closeCursor();
-			}
-
-			/*if($this->_connection->enableProfiling)
-				Yii::endProfile('system.db.TDbCommand.query('.$this->getText().')','system.db.TDbCommand.query');
-			 */
-			return $result;
-		}
-		catch(Exception $e)
-		{
-/*			if($this->_connection->enableProfiling)
-				Yii::endProfile('system.db.TDbCommand.query('.$this->getText().')','system.db.TDbCommand.query');
- */
-			Prado::log('Error in querying SQL: '.$this->getText().$params,TLogger::ERROR,'system.Db.TDbCommand');
-			throw new TDbException('TDbCommand failed to execute the SQL statement: {0}',
-				$e->getMessage());
-		}
-	}
-}
diff --git a/framework/Db/TDbConnection.php b/framework/Db/TDbConnection.php
deleted file mode 100755
index d377b552..00000000
--- a/framework/Db/TDbConnection.php
+++ /dev/null
@@ -1,759 +0,0 @@
-<?php
-/**
- * TDbConnection class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe Boulain <Christophe.Boulain@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-prado::using ('System.Db.TDbCommand');
-prado::using ('System.Db.TDbTransaction');
-
-/**
- * TDbConnection represents a connection to a database.
- *
- * This is a port of {@link http://www.yiiframework.com Yii} {@link http://www.yiiframework.com/ CDbConnection}
- *
- * TDbConnection works together with {@link TDbCommand}, {@link TDbDataReader}
- * and {@link TDbTransaction} to provide data access to various DBMS
- * in a common set of APIs. They are a thin wrapper of the {@link http://www.php.net/manual/en/ref.pdo.php PDO}
- * PHP extension.
- *
- * To establish a connection, set {@link setActive active} to true after
- * specifying {@link connectionString}, {@link username} and {@link password}.
- *
- * The following example shows how to create a TDbConnection instance and establish
- * the actual connection:
- * <pre>
- * $connection=new TDbConnection($dsn,$username,$password);
- * $connection->active=true;
- * </pre>
- *
- * After the DB connection is established, one can execute an SQL statement like the following:
- * <pre>
- * $command=$connection->createCommand($sqlStatement);
- * $command->execute();   // a non-query SQL statement execution
- * // or execute an SQL query and fetch the result set
- * $reader=$command->query();
- *
- * // each $row is an array representing a row of data
- * foreach($reader as $row) ...
- * </pre>
- *
- * One can do prepared SQL execution and bind parameters to the prepared SQL:
- * <pre>
- * $command=$connection->createCommand($sqlStatement);
- * $command->bindParam($name1,$value1);
- * $command->bindParam($name2,$value2);
- * $command->execute();
- * </pre>
- *
- * To use transaction, do like the following:
- * <pre>
- * $transaction=$connection->beginTransaction();
- * try
- * {
- *    $connection->createCommand($sql1)->execute();
- *    $connection->createCommand($sql2)->execute();
- *    //.... other SQL executions
- *    $transaction->commit();
- * }
- * catch(Exception $e)
- * {
- *    $transaction->rollBack();
- * }
- * </pre>
- *
- * TDbConnection also provides a set of methods to support setting and querying
- * of certain DBMS attributes, such as {@link getNullConversion nullConversion}.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @author Christophe.Boulain <Christophe.Boulain@gmail.com>
- * @version $Id$
- * @package System.Db
- * @since 3.2
- */
-class TDbConnection extends TComponent
-{
-	/**
-	 * @var string The Data Source Name, or DSN, contains the information required to connect to the database.
-	 * @see http://www.php.net/manual/en/function.PDO-construct.php
-	 */
-	public $connectionString;
-	/**
-	 * @var string the username for establishing DB connection. Defaults to empty string.
-	 */
-	public $username='';
-	/**
-	 * @var string the password for establishing DB connection. Defaults to empty string.
-	 */
-	public $password='';
-	/**
-	 * @var integer number of seconds that table metadata can remain valid in cache.
-	 * Use 0 or negative value to indicate not caching schema.
-	 * If greater than 0 and the primary cache is enabled, the table metadata will be cached.
-	 * @see schemaCachingExclude
-	 */
-	public $schemaCachingDuration=0;
-	/**
-	 * @var array list of tables whose metadata should NOT be cached. Defaults to empty array.
-	 * @see schemaCachingDuration
-	 */
-	public $schemaCachingExclude=array();
-	/**
-	 * @var boolean whether the database connection should be automatically established
-	 * the component is being initialized. Defaults to true. Note, this property is only
-	 * effective when the TDbConnection object is used as an application component.
-	 */
-	public $autoConnect=true;
-	/**
-	 * @var string the charset used for database connection. The property is only used
-	 * for MySQL and PostgreSQL databases. Defaults to null, meaning using default charset
-	 * as specified by the database.
-	 */
-	public $charset;
-	/**
-	 * @var boolean whether to turn on prepare emulation. Defaults to false, meaning PDO
-	 * will use the native prepare support if available. For some databases (such as MySQL),
-	 * this may need to be set true so that PDO can emulate the prepare support to bypass
-	 * the buggy native prepare support. Note, this property is only effective for PHP 5.1.3 or above.
-	 */
-	public $emulatePrepare=false;
-	/**
-	 * @var boolean whether to log the values that are bound to a prepare SQL statement.
-	 * Defaults to false. During development, you may consider setting this property to true
-	 * so that parameter values bound to SQL statements are logged for debugging purpose.
-	 * You should be aware that logging parameter values could be expensive and have significant
-	 * impact on the performance of your application.
-	 */
-	public $enableParamLogging=false;
-	/**
-	 * @var boolean whether to enable profiling the SQL statements being executed.
-	 * Defaults to false. This should be mainly enabled and used during development
-	 * to find out the bottleneck of SQL executions.
-	 */
-	public $enableProfiling=false;
-
-	private $_attributes=array();
-	private $_active=false;
-	private $_pdo;
-	private $_transaction;
-	private $_schema;
-
-
-	/**
-	 * Constructor.
-	 * Note, the DB connection is not established when this connection
-	 * instance is created. Set {@link setActive active} property to true
-	 * to establish the connection.
-	 * @param string The Data Source Name, or DSN, contains the information required to connect to the database.
-	 * @param string The user name for the DSN string.
-	 * @param string The password for the DSN string.
-	 * @see http://www.php.net/manual/en/function.PDO-construct.php
-	 */
-	public function __construct($dsn='',$username='',$password='')
-	{
-		$this->connectionString=$dsn;
-		$this->username=$username;
-		$this->password=$password;
-	}
-
-	/**
-	 * Close the connection when serializing.
-	 */
-	public function __sleep()
-	{
-		$this->close();
-		return array_keys(get_object_vars($this));
-	}
-
-	/**
-	 * @return array list of available PDO drivers
-	 * @see http://www.php.net/manual/en/function.PDO-getAvailableDrivers.php
-	 */
-	public static function getAvailableDrivers()
-	{
-		return PDO::getAvailableDrivers();
-	}
-
-	/**
-	 * Initializes the component.
-	 * This method is required by {@link IApplicationComponent} and is invoked by application
-	 * when the TDbConnection is used as an application component.
-	 * If you override this method, make sure to call the parent implementation
-	 * so that the component can be marked as initialized.
-	 */
-	public function init()
-	{
-		if($this->autoConnect)
-			$this->setActive(true);
-	}
-
-	/**
-	 * @return boolean whether the DB connection is established
-	 */
-	public function getActive()
-	{
-		return $this->_active;
-	}
-
-	/**
-	 * Open or close the DB connection.
-	 * @param boolean whether to open or close DB connection
-	 * @throws CException if connection fails
-	 */
-	public function setActive($value)
-	{
-		if($value!=$this->_active)
-		{
-			if($value)
-				$this->open();
-			else
-				$this->close();
-		}
-	}
-
-	/**
-	 * Opens DB connection if it is currently not
-	 * @throws CException if connection fails
-	 */
-	protected function open()
-	{
-		if($this->_pdo===null)
-		{
-			if(empty($this->connectionString))
-				throw new TDbException('TDbConnection.connectionString cannot be empty.');
-			try
-			{
-				Prado::trace('Opening DB connection','system.Db.TDbConnection');
-				$this->_pdo=$this->createPdoInstance();
-				$this->initConnection($this->_pdo);
-				$this->_active=true;
-			}
-			catch(PDOException $e)
-			{
-				throw new TDbException('TDbConnection failed to open the DB connection: {0}',$e->getMessage());
-			}
-		}
-	}
-
-	/**
-	 * Closes the currently active DB connection.
-	 * It does nothing if the connection is already closed.
-	 */
-	protected function close()
-	{
-		Prado::trace('Closing DB connection','system.Db.TDbConnection');
-		$this->_pdo=null;
-		$this->_active=false;
-		$this->_schema=null;
-	}
-
-	/**
-	 * Creates the PDO instance.
-	 * When some functionalities are missing in the pdo driver, we may use
-	 * an adapter class to provides them.
-	 * @return PDO the pdo instance
-	 * @since 1.0.4
-	 */
-	protected function createPdoInstance()
-	{
-		$pdoClass='PDO';
-		if(($pos=strpos($this->connectionString,':'))!==false)
-		{
-			$driver=strtolower(substr($this->connectionString,0,$pos));
-			if($driver==='mssql' || $driver==='dblib')
-			{
-				prado::using('System.Db.Schema.mssql.TMssqlPdoAdapter');
-				$pdoClass='TMssqlPdoAdapter';
-			}
-		}
-		return new $pdoClass($this->connectionString,$this->username,
-									$this->password,$this->_attributes);
-	}
-
-	/**
-	 * Initializes the open db connection.
-	 * This method is invoked right after the db connection is established.
-	 * The default implementation is to set the charset for MySQL and PostgreSQL database connections.
-	 * @param PDO the PDO instance
-	 */
-	protected function initConnection($pdo)
-	{
-		$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
-		if($this->emulatePrepare && constant('PDO::ATTR_EMULATE_PREPARES'))
-			$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES,true);
-		if($this->charset!==null)
-		{
-			switch ($pdo->getAttribute(PDO::ATTR_DRIVER_NAME))
-			{
-				case 'mysql':
-					$stmt = $pdo->prepare('SET CHARACTER SET ?');
-				break;
-				case 'pgsql':
-					$stmt = $pdo->prepare('SET client_encoding TO ?');
-				break;
-				case 'sqlite':
-					$stmt = $pdo->prepare ('SET NAMES ?');
-				break;
-			}
-			$stmt->execute(array($this->charset));
-		}
-	}
-
-	/**
-	 * @return PDO the PDO instance, null if the connection is not established yet
-	 */
-	public function getPdoInstance()
-	{
-		return $this->_pdo;
-	}
-
-	/**
-	 * Creates a command for execution.
-	 * @param string SQL statement associated with the new command.
-	 * @return TDbCommand the DB command
-	 * @throws CException if the connection is not active
-	 */
-	public function createCommand($sql)
-	{
-		if($this->getActive())
-			return new TDbCommand($this,$sql);
-		else
-			throw new TDbException('TDbConnection is inactive and cannot perform any DB operations.');
-	}
-
-	/**
-	 * @return TDbTransaction the currently active transaction. Null if no active transaction.
-	 */
-	public function getCurrentTransaction()
-	{
-		if($this->_transaction!==null)
-		{
-			if($this->_transaction->getActive())
-				return $this->_transaction;
-		}
-		return null;
-	}
-
-	/**
-	 * Starts a transaction.
-	 * @return TDbTransaction the transaction initiated
-	 * @throws CException if the connection is not active
-	 */
-	public function beginTransaction()
-	{
-		if($this->getActive())
-		{
-			$this->_pdo->beginTransaction();
-			return $this->_transaction=new TDbTransaction($this);
-		}
-		else
-			throw new TDbException('TDbConnection is inactive and cannot perform any DB operations.');
-	}
-
-	/**
-	 * @return TDbSchema the database schema for the current connection
-	 * @throws CException if the connection is not active yet
-	 */
-	public function getSchema()
-	{
-		if($this->_schema!==null)
-			return $this->_schema;
-		else
-		{
-			if(!$this->getActive())
-				throw new TDbException('TDbConnection is inactive and cannot perform any DB operations.');
-			$driver=$this->getDriverName();
-			switch(strtolower($driver))
-			{
-				case 'pgsql':  // PostgreSQL
-					prado::using('System.Db.Schema.pgsql.TPgsqlSchema');
-					return $this->_schema=new TPgsqlSchema($this);
-				case 'mysqli': // MySQL
-				case 'mysql':
-					prado::using('System.Db.Schema.mysql.TMysqlSchema');
-					return $this->_schema=new TMysqlSchema($this);
-				case 'sqlite': // sqlite 3
-				case 'sqlite2': // sqlite 2
-					prado::using('System.Db.Schema.sqlite.TSqliteSchema');
-					return $this->_schema=new TSqliteSchema($this);
-				case 'mssql': // Mssql driver on windows hosts
-				case 'dblib': // dblib drivers on linux (and maybe others os) hosts
-					prado::using('System.Db.Schema.mssql.TMssqlSchema');
-					return $this->_schema=new TMssqlSchema($this);
-				case 'oci':  // Oracle driver
-					prado::using('System.Db.Schema.oci.TOciSchema');
-					return $this->_schema=new TOciSchema($this);
-				case 'ibm':
-				default:
-					throw new TDbException('TDbConnection does not support reading schema for {0} database.',
-						$driver);
-			}
-		}
-	}
-
-	/**
-	 * Returns the SQL command builder for the current DB connection.
-	 * @return TDbCommandBuilder the command builder
-	 */
-	public function getCommandBuilder()
-	{
-		return $this->getSchema()->getCommandBuilder();
-	}
-
-	/**
-	 * Returns the ID of the last inserted row or sequence value.
-	 * @param string name of the sequence object (required by some DBMS)
-	 * @return string the row ID of the last row inserted, or the last value retrieved from the sequence object
-	 * @see http://www.php.net/manual/en/function.PDO-lastInsertId.php
-	 */
-	public function getLastInsertID($sequenceName='')
-	{
-		if($this->getActive())
-			return $this->_pdo->lastInsertId($sequenceName);
-		else
-			throw new TDbException('TDbConnection is inactive and cannot perform any DB operations.');
-	}
-
-	/**
-	 * Quotes a string value for use in a query.
-	 * @param string string to be quoted
-	 * @return string the properly quoted string
-	 * @see http://www.php.net/manual/en/function.PDO-quote.php
-	 */
-	public function quoteString($str)
-	{
-		if($this->getActive())
-			return $this->_pdo->quote($str);
-		else
-			throw new TDbException('TDbConnection is inactive and cannot perform any DB operations.');
-	}
-
-	/**
-	 * Quotes a table name for use in a query.
-	 * @param string table name
-	 * @return string the properly quoted table name
-	 */
-	public function quoteTableName($name)
-	{
-		return $this->getSchema()->quoteTableName($name);
-	}
-
-	/**
-	 * Quotes a column name for use in a query.
-	 * @param string column name
-	 * @return string the properly quoted column name
-	 */
-	public function quoteColumnName($name)
-	{
-		return $this->getSchema()->quoteColumnName($name);
-	}
-
-	/**
-	 * Determines the PDO type for the specified PHP type.
-	 * @param string The PHP type (obtained by gettype() call).
-	 * @return integer the corresponding PDO type
-	 */
-	public function getPdoType($type)
-	{
-		static $map=array
-		(
-			'boolean'=>PDO::PARAM_BOOL,
-			'integer'=>PDO::PARAM_INT,
-			'string'=>PDO::PARAM_STR,
-			'NULL'=>PDO::PARAM_NULL,
-		);
-		return isset($map[$type]) ? $map[$type] : PDO::PARAM_STR;
-	}
-
-	/**
-	 * @return TDbColumnCaseMode the case of the column names
-	 */
-	public function getColumnCase()
-	{
-		switch($this->getAttribute(PDO::ATTR_CASE))
-		{
-			case PDO::CASE_NATURAL:
-				return TDbColumnCaseMode::Preserved;
-			case PDO::CASE_LOWER:
-				return TDbColumnCaseMode::LowerCase;
-			case PDO::CASE_UPPER:
-				return TDbColumnCaseMode::UpperCase;
-		}
-	}
-
-	/**
-	 * @param TDbColumnCaseMode the case of the column names
-	 */
-	public function setColumnCase($value)
-	{
-		switch(TPropertyValue::ensureEnum($value,'TDbColumnCaseMode'))
-		{
-			case TDbColumnCaseMode::Preserved:
-				$value=PDO::CASE_NATURAL;
-				break;
-			case TDbColumnCaseMode::LowerCase:
-				$value=PDO::CASE_LOWER;
-				break;
-			case TDbColumnCaseMode::UpperCase:
-				$value=PDO::CASE_UPPER;
-				break;
-		}
-		$this->setAttribute(PDO::ATTR_CASE,$value);
-	}
-	/**
-	 * @return TDbNullConversionMode how the null and empty strings are converted
-	 */
-	public function getNullConversion()
-	{
-		switch($this->getAttribute(PDO::ATTR_ORACLE_NULLS))
-		{
-			case PDO::NULL_NATURAL:
-				return TDbNullConversionMode::Preserved;
-			case PDO::NULL_EMPTY_STRING:
-				return TDbNullConversionMode::EmptyStringToNull;
-			case PDO::NULL_TO_STRING:
-				return TDbNullConversionMode::NullToEmptyString;
-		}
-	}
-
-	/**
-	 * @param TDbNullConversionMode how the null and empty strings are converted
-	 */
-	public function setNullConversion($value)
-	{
-		switch(TPropertyValue::ensureEnum($value,'TDbNullConversionMode'))
-		{
-			case TDbNullConversionMode::Preserved:
-				$value=PDO::NULL_NATURAL;
-				break;
-			case TDbNullConversionMode::EmptyStringToNull:
-				$value=PDO::NULL_EMPTY_STRING;
-				break;
-			case TDbNullConversionMode::NullToEmptyString:
-				$value=PDO::NULL_TO_STRING;
-				break;
-		}
-		$this->setAttribute(PDO::ATTR_ORACLE_NULLS,$value);
-	}
-
-	/**
-	 * @return boolean whether creating or updating a DB record will be automatically committed.
-	 * Some DBMS (such as sqlite) may not support this feature.
-	 */
-	public function getAutoCommit()
-	{
-		return $this->getAttribute(PDO::ATTR_AUTOCOMMIT);
-	}
-
-	/**
-	 * @param boolean whether creating or updating a DB record will be automatically committed.
-	 * Some DBMS (such as sqlite) may not support this feature.
-	 */
-	public function setAutoCommit($value)
-	{
-		$this->setAttribute(PDO::ATTR_AUTOCOMMIT,$value);
-	}
-
-	/**
-	 * @return boolean whether the connection is persistent or not
-	 * Some DBMS (such as sqlite) may not support this feature.
-	 */
-	public function getPersistent()
-	{
-		return $this->getAttribute(PDO::ATTR_PERSISTENT);
-	}
-
-	/**
-	 * @param boolean whether the connection is persistent or not
-	 * Some DBMS (such as sqlite) may not support this feature.
-	 */
-	public function setPersistent($value)
-	{
-		return $this->setAttribute(PDO::ATTR_PERSISTENT,$value);
-	}
-
-	/**
-	 * @return string name of the DB driver
-	 */
-	public function getDriverName()
-	{
-		return $this->getAttribute(PDO::ATTR_DRIVER_NAME);
-	}
-
-	/**
-	 * @return string the version information of the DB driver
-	 */
-	public function getClientVersion()
-	{
-		return $this->getAttribute(PDO::ATTR_CLIENT_VERSION);
-	}
-
-	/**
-	 * @return string the status of the connection
-	 * Some DBMS (such as sqlite) may not support this feature.
-	 */
-	public function getConnectionStatus()
-	{
-		return $this->getAttribute(PDO::ATTR_CONNECTION_STATUS);
-	}
-
-	/**
-	 * @return boolean whether the connection performs data prefetching
-	 */
-	public function getPrefetch()
-	{
-		return $this->getAttribute(PDO::ATTR_PREFETCH);
-	}
-
-	/**
-	 * @return string the information of DBMS server
-	 */
-	public function getServerInfo()
-	{
-		return $this->getAttribute(PDO::ATTR_SERVER_INFO);
-	}
-
-	/**
-	 * @return string the version information of DBMS server
-	 */
-	public function getServerVersion()
-	{
-		return $this->getAttribute(PDO::ATTR_SERVER_VERSION);
-	}
-
-	/**
-	 * @return int timeout settings for the connection
-	 */
-	public function getTimeout()
-	{
-		return $this->getAttribute(PDO::ATTR_TIMEOUT);
-	}
-
-	/**
-	 * Obtains a specific DB connection attribute information.
-	 * @param int the attribute to be queried
-	 * @return mixed the corresponding attribute information
-	 * @see http://www.php.net/manual/en/function.PDO-getAttribute.php
-	 */
-	public function getAttribute($name)
-	{
-		if($this->getActive())
-			return $this->_pdo->getAttribute($name);
-		else
-			throw new TDbException('TDbConnection is inactive and cannot perform any DB operations.');
-	}
-
-	/**
-	 * Sets an attribute on the database connection.
-	 * @param int the attribute to be set
-	 * @param mixed the attribute value
-	 * @see http://www.php.net/manual/en/function.PDO-setAttribute.php
-	 */
-	public function setAttribute($name,$value)
-	{
-		if($this->_pdo instanceof PDO)
-			$this->_pdo->setAttribute($name,$value);
-		else
-			$this->_attributes[$name]=$value;
-	}
-
-	/**
-	 * Returns the statistical results of SQL executions.
-	 * The results returned include the number of SQL statements executed and
-	 * the total time spent.
-	 * In order to use this method, {@link enableProfiling} has to be set true.
-	 * @return array the first element indicates the number of SQL statements executed,
-	 * and the second element the total time spent in SQL execution.
-	 * @since 1.0.6
-	 */
-	public function getStats()
-	{
-		/*$logger=Yii::getLogger();
-		$timings=$logger->getProfilingResults(null,'system.Db.TDbCommand.query');
-		$count=count($timings);
-		$time=array_sum($timings);
-		$timings=$logger->getProfilingResults(null,'system.Db.TDbCommand.execute');
-		$count+=count($timings);
-		$time+=array_sum($timings);
-		return array($count,$time);*/
-	}
-
-	/**
-	 * Getters & Setters to provide BC with prado-3.1
-	 */
-	public function getConnectionString() { return $this->connectionString;	}
-	public function getUsername () { return $this->username; }
-	public function getPassword () { return $this->password; }
-	public function getCharset () { return $this->charset; }
-	public function getSchemaCachingDuration() { return $this->schemaCachingDuration; }
-	public function getSchemaCachingExclude () { return $this->schemaCachingExclude; }
-	public function getAutoConnect () { return $this->autoConnect; }
-	public function getEmulatePrepare () { return $this->emulatePrepare; }
-	public function getEnableParamLogging () { return $this->enableParamLogging; }
-	public function getEnableProfiling () { return $this->enableProfiling; }
-
-	public function setConnectionString($value) { $this->connectionString=TPropertyValue::ensureString($value);	}
-	public function setUsername ($value) { $this->username=TPropertyValue::ensureString($value); }
-	public function setPassword ($value) { $this->password=TPropertyValue::ensureString($value); }
-	public function setCharset ($value) { $this->charset=TPropertyValue::ensureString($value); }
-	public function setSchemaCachingDuration ($value) { $this->schemaCachingDuration=TPropertyValue::ensureInteger($value); }
-	public function setSchemaCachingExclude ($value) { $this->username=TPropertyValue::ensureArray($value); }
-	public function setAutoConnect ($value) { $this->autoConnect = TPropertyValue::ensureBoolean($value); }
-	public function setEnablePrepare ($value) { $this->emulatePrepare = TPropertyValue::ensureBoolean($value); }
-	public function setEnableParamLogging ($value) { $this->enableParamLogging = TPropertyValue::ensureBoolean($value); }
-	public function setEnableProfiling ($value) { $this->enableProfiling = TPropertyValue::ensureBoolean ($value) ; }
-}
-
-
-/**
- * TDbColumnCaseMode
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Db
- * @since 3.0
- */
-class TDbColumnCaseMode extends TEnumerable
-{
-	/**
-	 * Column name cases are kept as is from the database
-	 */
-	const Preserved='Preserved';
-	/**
-	 * Column names are converted to lower case
-	 */
-	const LowerCase='LowerCase';
-	/**
-	 * Column names are converted to upper case
-	 */
-	const UpperCase='UpperCase';
-}
-
-/**
- * TDbNullConversionMode
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Db
- * @since 3.0
- */
-class TDbNullConversionMode extends TEnumerable
-{
-	/**
-	 * No conversion is performed for null and empty values.
-	 */
-	const Preserved='Preserved';
-	/**
-	 * NULL is converted to empty string
-	 */
-	const NullToEmptyString='NullToEmptyString';
-	/**
-	 * Empty string is converted to NULL
-	 */
-	const EmptyStringToNull='EmptyStringToNull';
-}
diff --git a/framework/Db/TDbDataReader.php b/framework/Db/TDbDataReader.php
deleted file mode 100755
index 87fee5ed..00000000
--- a/framework/Db/TDbDataReader.php
+++ /dev/null
@@ -1,221 +0,0 @@
-<?php
-/**
- * TDbDataReader class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-/**
- * TDbDataReader represents a forward-only stream of rows from a query result set.
- *
- * To read the current row of data, call {@link read}. The method {@link readAll}
- * returns all the rows in a single array.
- *
- * One can also retrieve the rows of data in TDbDataReader by using foreach:
- * <pre>
- * foreach($reader as $row)
- *     // $row represents a row of data
- * </pre>
- * Since TDbDataReader is a forward-only stream, you can only traverse it once.
- *
- * It is possible to use a specific mode of data fetching by setting
- * {@link setFetchMode FetchMode}. See {@link http://www.php.net/manual/en/function.PDOStatement-setFetchMode.php}
- * for more details.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package system.db
- * @since 1.0
- */
-class TDbDataReader extends TComponent implements Iterator
-{
-	private $_statement;
-	private $_closed=false;
-	private $_row;
-	private $_index=-1;
-
-	/**
-	 * Constructor.
-	 * @param TDbCommand the command generating the query result
-	 */
-	public function __construct(TDbCommand $command)
-	{
-		$this->_statement=$command->getPdoStatement();
-		$this->_statement->setFetchMode(PDO::FETCH_ASSOC);
-	}
-
-	/**
-	 * Binds a column to a PHP variable.
-	 * When rows of data are being fetched, the corresponding column value
-	 * will be set in the variable. Note, the fetch mode must include PDO::FETCH_BOUND.
-	 * @param mixed Number of the column (1-indexed) or name of the column
-	 * in the result set. If using the column name, be aware that the name
-	 * should match the case of the column, as returned by the driver.
-	 * @param mixed Name of the PHP variable to which the column will be bound.
-	 * @param int Data type of the parameter
-	 * @see http://www.php.net/manual/en/function.PDOStatement-bindColumn.php
-	 */
-	public function bindColumn($column, &$value, $dataType=null)
-	{
-		if($dataType===null)
-			$this->_statement->bindColumn($column,$value);
-		else
-			$this->_statement->bindColumn($column,$value,$dataType);
-	}
-
-	/**
-	 * @see http://www.php.net/manual/en/function.PDOStatement-setFetchMode.php
-	 */
-	public function setFetchMode($mode)
-	{
-		$params=func_get_args();
-		call_user_func_array(array($this->_statement,'setFetchMode'),$params);
-	}
-
-	/**
-	 * Advances the reader to the next row in a result set.
-	 * @return array|false the current row, false if no more row available
-	 */
-	public function read()
-	{
-		return $this->_statement->fetch();
-	}
-
-	/**
-	 * Returns a single column from the next row of a result set.
-	 * @param int zero-based column index
-	 * @return mixed|false the column of the current row, false if no more row available
-	 */
-	public function readColumn($columnIndex)
-	{
-		return $this->_statement->fetchColumn($columnIndex);
-	}
-
-	/**
-	 * Returns an object populated with the next row of data.
-	 * @param string class name of the object to be created and populated
-	 * @param array Elements of this array are passed to the constructor
-	 * @return mixed|false the populated object, false if no more row of data available
-	 */
-	public function readObject($className,$fields)
-	{
-		return $this->_statement->fetchObject($className,$fields);
-	}
-
-	/**
-	 * Reads the whole result set into an array.
-	 * @return array the result set (each array element represents a row of data).
-	 * An empty array will be returned if the result contains no row.
-	 */
-	public function readAll()
-	{
-		return $this->_statement->fetchAll();
-	}
-
-	/**
-	 * Advances the reader to the next result when reading the results of a batch of statements.
-	 * This method is only useful when there are multiple result sets
-	 * returned by the query. Not all DBMS support this feature.
-	 */
-	public function nextResult()
-	{
-		return $this->_statement->nextRowset();
-	}
-
-	/**
-	 * Closes the reader.
-	 * This frees up the resources allocated for executing this SQL statement.
-	 * Read attemps after this method call are unpredictable.
-	 */
-	public function close()
-	{
-		$this->_statement->closeCursor();
-		$this->_closed=true;
-	}
-
-	/**
-	 * @return boolean whether the reader is closed or not.
-	 */
-	public function getIsClosed()
-	{
-		return $this->_closed;
-	}
-
-	/**
-	 * @return int number of rows contained in the result.
-	 * Note, most DBMS may not give a meaningful count.
-	 * In this case, use "SELECT COUNT(*) FROM tableName" to obtain the number of rows.
-	 */
-	public function getRowCount()
-	{
-		return $this->_statement->rowCount();
-	}
-
-	/**
-	 * @return int the number of columns in the result set.
-	 * Note, even there's no row in the reader, this still gives correct column number.
-	 */
-	public function getColumnCount()
-	{
-		return $this->_statement->columnCount();
-	}
-
-	/**
-	 * Resets the iterator to the initial state.
-	 * This method is required by the interface Iterator.
-	 * @throws CException if this method is invoked twice
-	 */
-	public function rewind()
-	{
-		if($this->_index<0)
-		{
-			$this->_row=$this->_statement->fetch();
-			$this->_index=0;
-		}
-		else
-			throw new TDbException('dbdatareader_rewind_invalid');
-	}
-
-	/**
-	 * Returns the index of the current row.
-	 * This method is required by the interface Iterator.
-	 * @return integer the index of the current row.
-	 */
-	public function key()
-	{
-		return $this->_index;
-	}
-
-	/**
-	 * Returns the current row.
-	 * This method is required by the interface Iterator.
-	 * @return mixed the current row.
-	 */
-	public function current()
-	{
-		return $this->_row;
-	}
-
-	/**
-	 * Moves the internal pointer to the next row.
-	 * This method is required by the interface Iterator.
-	 */
-	public function next()
-	{
-		$this->_row=$this->_statement->fetch();
-		$this->_index++;
-	}
-
-	/**
-	 * Returns whether there is a row of data at current position.
-	 * This method is required by the interface Iterator.
-	 * @return boolean whether there is a row of data at current position.
-	 */
-	public function valid()
-	{
-		return $this->_row!==false;
-	}
-}
diff --git a/framework/Db/TDbTransaction.php b/framework/Db/TDbTransaction.php
deleted file mode 100755
index 357dd645..00000000
--- a/framework/Db/TDbTransaction.php
+++ /dev/null
@@ -1,111 +0,0 @@
-<?php
-/**
- * TDbTransaction class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2009 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
-Prado::using('System.Db.TDbDataReader');
-
-
-/**
- * TDbTransaction represents a DB transaction.
- *
- * It is usually created by calling {@link TDbConnection::beginTransaction}.
- *
- * The following code is a common scenario of using transactions:
- * <pre>
- * $transaction=$connection->beginTransaction();
- * try
- * {
- *    $connection->createCommand($sql1)->execute();
- *    $connection->createCommand($sql2)->execute();
- *    //.... other SQL executions
- *    $transaction->commit();
- * }
- * catch(Exception $e)
- * {
- *    $transaction->rollBack();
- * }
- * </pre>
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package system.db
- * @since 1.0
- */
-class TDbTransaction extends TComponent
-{
-	private $_connection=null;
-	private $_active;
-
-	/**
-	 * Constructor.
-	 * @param TDbConnection the connection associated with this transaction
-	 * @see TDbConnection::beginTransaction
-	 */
-	public function __construct(TDbConnection $connection)
-	{
-		$this->_connection=$connection;
-		$this->setActive(true);
-	}
-
-	/**
-	 * Commits a transaction.
-	 * @throws CException if the transaction or the DB connection is not active.
-	 */
-	public function commit()
-	{
-		if($this->_active && $this->_connection->getActive())
-		{
-			Prado::trace('Committing transaction','system.Db.TDbTransaction');
-			$this->_connection->getPdoInstance()->commit();
-			$this->_active=false;
-		}
-		else
-			throw new TDbException('dbtransaction_transaction_inactive');
-	}
-
-	/**
-	 * Rolls back a transaction.
-	 * @throws CException if the transaction or the DB connection is not active.
-	 */
-	public function rollback()
-	{
-		if($this->_active && $this->_connection->getActive())
-		{
-			Prado::trace('Rolling back transaction','system.Fb.TDbTransaction');
-			$this->_connection->getPdoInstance()->rollBack();
-			$this->_active=false;
-		}
-		else
-			throw new TDbException('dbtransaction_transaction_inactive');
-	}
-
-	/**
-	 * @return TDbConnection the DB connection for this transaction
-	 */
-	public function getConnection()
-	{
-		return $this->_connection;
-	}
-
-	/**
-	 * @return boolean whether this transaction is active
-	 */
-	public function getActive()
-	{
-		return $this->_active;
-	}
-
-	/**
-	 * @param boolean whether this transaction is active
-	 */
-	protected function setActive($value)
-	{
-		$this->_active=TPropertyValue::ensureBoolean($value);
-	}
-}