From 78af2b4630ccde4b03659a259f739f83ae0de9ec Mon Sep 17 00:00:00 2001 From: rojaro <> Date: Mon, 13 Jul 2009 14:02:17 +0000 Subject: - ActiveRecord Port from Yii ... not perfect but works ^^ --- framework/Db/Schema/mssql/TMssqlSchema.php | 312 +++++++++++++++++++++++++++++ 1 file changed, 312 insertions(+) create mode 100755 framework/Db/Schema/mssql/TMssqlSchema.php (limited to 'framework/Db/Schema/mssql/TMssqlSchema.php') diff --git a/framework/Db/Schema/mssql/TMssqlSchema.php b/framework/Db/Schema/mssql/TMssqlSchema.php new file mode 100755 index 00000000..063e8994 --- /dev/null +++ b/framework/Db/Schema/mssql/TMssqlSchema.php @@ -0,0 +1,312 @@ + + * @author Christophe Boulain + * @link http://www.yiiframework.com/ + * @copyright Copyright © 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 + * @author Christophe Boulain + * @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; + } + + $sql = <<quoteTableName($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 + $sql = <<quoteTableName($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; + $sql=<<getDbConnection()->createCommand($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); + } +} -- cgit v1.2.3