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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\mssql;
use yii\db\TableSchema;
/**
* Schema is the class for retrieving metadata from a MS SQL database (version 2008 and above).
*
* @author Timur Ruziev <qiang.xue@gmail.com>
* @since 2.0
*/
class Schema extends \yii\db\Schema
{
/**
* Default schema name to be used.
*/
const DEFAULT_SCHEMA = 'dbo';
/**
* @var array mapping from physical column types (keys) to abstract column types (values)
*/
public $typeMap = array(
// TODO: mssql driver
);
/**
* @param string $name
* @return TableSchema
*/
public function loadTableSchema($name)
{
return null;
}
/**
* Quotes a table name for use in a query.
* A simple table name has no schema prefix.
* @param string $name table name.
* @return string the properly quoted table name.
*/
public function quoteSimpleTableName($name)
{
return strpos($name, '[') !== false ? $name : '[' . $name . ']';
}
/**
* Quotes a column name for use in a query.
* A simple column name has no prefix.
* @param string $name column name.
* @return string the properly quoted column name.
*/
public function quoteSimpleColumnName($name)
{
return strpos($name, '[') !== false || $name === '*' ? $name : '[' . $name . ']';
}
/**
* Creates a query builder for the MSSQL database.
* @return QueryBuilder query builder interface.
*/
public function createQueryBuilder()
{
return new QueryBuilder($this->db);
}
/**
* Returns all table names in the database.
* This method should be overridden by child classes in order to support this feature
* because the default implementation simply throws an exception.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* @return array all table names in the database. The names have NO the schema name prefix.
*/
protected function findTableNames($schema = '')
{
if ('' === $schema) {
$schema = self::DEFAULT_SCHEMA;
}
$sql = "SELECT TABLE_NAME FROM [INFORMATION_SCHEMA].[TABLES] WHERE TABLE_SCHEMA = :schema AND TABLE_TYPE = 'BASE TABLE'";
$names = $this->db->createCommand($sql, array(':schema' => $schema))->queryColumn();
if (self::DEFAULT_SCHEMA !== $schema) {
foreach ($names as $index => $name) {
$names[$index] = $schema . '.' . $name;
}
}
return $names;
}
}