1 files changed, 350 insertions, 0 deletions
diff --git a/framework/db/schema/oci/COciSchema.php b/framework/db/schema/oci/COciSchema.php
new file mode 100644
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+++ b/framework/db/schema/oci/COciSchema.php
@@ -0,0 +1,350 @@
+<?php
+/**
+ * COciSchema class file.
+ *
+ * @author Ricardo Grana <rickgrana@yahoo.com.br>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2011 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+/**
+ * COciSchema is the class for retrieving metadata information from an Oracle database.
+ *
+ * @property string $defaultSchema Default schema.
+ *
+ * @author Ricardo Grana <rickgrana@yahoo.com.br>
+ * @version $Id: COciSchema.php 3515 2011-12-28 12:29:24Z mdomba $
+ * @package system.db.schema.oci
+ */
+class COciSchema extends CDbSchema
+{
+	private $_defaultSchema = '';
+
+	/**
+	 * @var array the abstract column types mapped to physical column types.
+	 * @since 1.1.6
+	 */
+    public $columnTypes=array(
+        'pk' => 'NUMBER(10) NOT NULL PRIMARY KEY',
+        'string' => 'VARCHAR2(255)',
+        'text' => 'CLOB',
+        'integer' => 'NUMBER(10)',
+        'float' => 'NUMBER',
+        'decimal' => 'NUMBER',
+        'datetime' => 'TIMESTAMP',
+        'timestamp' => 'TIMESTAMP',
+        'time' => 'TIMESTAMP',
+        'date' => 'DATE',
+        'binary' => 'BLOB',
+        'boolean' => 'NUMBER(1)',
+		'money' => 'NUMBER(19,4)',
+    );
+
+	/**
+	 * Quotes a table name for use in a query.
+	 * A simple table name does not schema prefix.
+	 * @param string $name table name
+	 * @return string the properly quoted table name
+	 * @since 1.1.6
+	 */
+	public function quoteSimpleTableName($name)
+	{
+		return '"'.$name.'"';
+	}
+
+	/**
+	 * Quotes a column name for use in a query.
+	 * A simple column name does not contain prefix.
+	 * @param string $name column name
+	 * @return string the properly quoted column name
+	 * @since 1.1.6
+	 */
+	public function quoteSimpleColumnName($name)
+	{
+		return '"'.$name.'"';
+	}
+
+	/**
+	 * Creates a command builder for the database.
+	 * This method may be overridden by child classes to create a DBMS-specific command builder.
+	 * @return CDbCommandBuilder command builder instance
+	 */
+	protected function createCommandBuilder()
+	{
+		return new COciCommandBuilder($this);
+	}
+
+	/**
+     * @param string $schema default schema.
+     */
+    public function setDefaultSchema($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 $table table name with optional schema name prefix, uses default schema name prefix is not provided.
+     * @return array tuple as ($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]);
+    }
+
+	/**
+	 * Loads the metadata for the specified table.
+	 * @param string $name table name
+	 * @return CDbTableSchema driver dependent table metadata.
+	 */
+	protected function loadTable($name)
+	{
+		$table=new COciTableSchema;
+		$this->resolveTableNames($table,$name);
+
+		if(!$this->findColumns($table))
+			return null;
+		$this->findConstraints($table);
+
+		return $table;
+	}
+
+	/**
+	 * Generates various kinds of table names.
+	 * @param COciTableSchema $table the table instance
+	 * @param string $name the unquoted table name
+	 */
+	protected function resolveTableNames($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 COciTableSchema $table the table metadata
+	 * @return boolean whether the table exists in the database
+	 */
+	protected function findColumns($table)
+	{
+		$schemaName=$table->schemaName;
+		$tableName=$table->name;
+
+		$sql=<<<EOD
+SELECT a.column_name, a.data_type ||
+    case
+        when data_precision is not null
+            then '(' || a.data_precision ||
+                    case when a.data_scale > 0 then ',' || a.data_scale else '' end
+                || ')'
+        when data_type = 'DATE' then ''
+        when data_type = 'NUMBER' then ''
+        else '(' || to_char(a.data_length) || ')'
+    end as data_type,
+    a.nullable, a.data_default,
+    (   SELECT D.constraint_type
+        FROM ALL_CONS_COLUMNS C
+        inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
+        WHERE C.OWNER = B.OWNER
+           and C.table_name = B.object_name
+           and C.column_name = A.column_name
+           and D.constraint_type = 'P') as Key
+FROM ALL_TAB_COLUMNS A
+inner join ALL_OBJECTS B ON b.owner = a.owner and ltrim(B.OBJECT_NAME) = ltrim(A.TABLE_NAME)
+WHERE
+    a.owner = '{$schemaName}'
+	and (b.object_type = 'TABLE' or b.object_type = 'VIEW')
+	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;
+				$table->sequenceName='';
+				$c->autoIncrement=true;
+			}
+		}
+		return true;
+	}
+
+	/**
+	 * Creates a table column.
+	 * @param array $column column metadata
+	 * @return CDbColumnSchema normalized column metadata
+	 */
+	protected function createColumn($column)
+	{
+		$c=new COciColumnSchema;
+		$c->name=$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 COciTableSchema $table the table metadata
+	 */
+	protected function findConstraints($table)
+	{
+		$sql=<<<EOD
+		SELECT D.constraint_type as CONSTRAINT_TYPE, C.COLUMN_NAME, C.position, D.r_constraint_name,
+                E.table_name as table_ref, f.column_name as column_ref,
+            	C.table_name
+        FROM ALL_CONS_COLUMNS C
+        inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
+        left join ALL_constraints E on E.OWNER = D.r_OWNER and E.constraint_name = D.r_constraint_name
+        left join ALL_cons_columns F on F.OWNER = E.OWNER and F.constraint_name = E.constraint_name and F.position = c.position
+        WHERE C.OWNER = '{$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"], $row["COLUMN_REF"]);
+				if(isset($table->columns[$name]))
+					$table->columns[$name]->isForeignKey=true;
+			}
+
+		}
+	}
+
+	/**
+	 * Returns all table names in the database.
+	 * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
+	 * If not empty, the returned table names will be prefixed with the schema name.
+	 * @return array all table names in the database.
+	 */
+	protected function findTableNames($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() || $schema==='')
+				$names[]=$row['TABLE_NAME'];
+			else
+				$names[]=$row['TABLE_SCHEMA'].'.'.$row['TABLE_NAME'];
+		}
+		return $names;
+	}
+
+	/**
+	 * Builds a SQL statement for renaming a DB table.
+	 * @param string $table the table to be renamed. The name will be properly quoted by the method.
+	 * @param string $newName the new table name. The name will be properly quoted by the method.
+	 * @return string the SQL statement for renaming a DB table.
+	 * @since 1.1.6
+	 */
+	public function renameTable($table, $newName)
+	{
+		return 'ALTER TABLE ' . $this->quoteTableName($table) . ' RENAME TO ' . $this->quoteTableName($newName);
+	}
+
+	/**
+	 * Builds a SQL statement for changing the definition of a column.
+	 * @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
+	 * @param string $column the name of the column to be changed. The name will be properly quoted by the method.
+	 * @param string $type the new column type. The {@link getColumnType} method will be invoked to convert abstract column type (if any)
+	 * into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
+	 * For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
+	 * @return string the SQL statement for changing the definition of a column.
+	 * @since 1.1.6
+	 */
+	public function alterColumn($table, $column, $type)
+	{
+		$type=$this->getColumnType($type);
+		$sql='ALTER TABLE ' . $this->quoteTableName($table) . ' MODIFY '
+			. $this->quoteColumnName($column) . ' '
+			. $this->getColumnType($type);
+		return $sql;
+	}
+
+	/**
+	 * Builds a SQL statement for dropping an index.
+	 * @param string $name the name of the index to be dropped. The name will be properly quoted by the method.
+	 * @param string $table the table whose index is to be dropped. The name will be properly quoted by the method.
+	 * @return string the SQL statement for dropping an index.
+	 * @since 1.1.6
+	 */
+	public function dropIndex($name, $table)
+	{
+		return 'DROP INDEX '.$this->quoteTableName($name);
+	}
+}