1 files changed, 312 insertions, 0 deletions
diff --git a/framework/Db/schema/mssql/TMssqlSchema.php b/framework/Db/schema/mssql/TMssqlSchema.php
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+++ b/framework/Db/schema/mssql/TMssqlSchema.php
@@ -0,0 +1,312 @@
+<?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 $Id$
+ * @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);
+	}
+}