Query/docs/files/drivers/pgsql/pgsql_driver.php.txt
2014-04-24 11:25:12 -04:00

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<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @package Query
* @author Timothy J. Warren
* @copyright Copyright (c) 2012 - 2014
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
namespace Query\Driver;
/**
* PostgreSQL specifc class
*
* @package Query
* @subpackage Drivers
*/
class PgSQL extends Abstract_Driver {
/**
* Connect to a PosgreSQL database
*
* @param string $dsn
* @param string $username
* @param string $password
* @param array $options
*/
public function __construct($dsn, $username=null, $password=null, array $options=array())
{
if (strpos($dsn, 'pgsql') === FALSE) $dsn = 'pgsql:'.$dsn;
parent::__construct($dsn, $username, $password, $options);
}
// --------------------------------------------------------------------------
/**
* Empty a table
*
* @param string $table
*/
public function truncate($table)
{
$sql = 'TRUNCATE "' . $table . '"';
$this->query($sql);
}
// --------------------------------------------------------------------------
/**
* Get a list of schemas for the current connection
*
* @return array
*/
public function get_schemas()
{
$sql = <<<SQL
SELECT DISTINCT "schemaname" FROM "pg_tables"
WHERE "schemaname" NOT LIKE 'pg\_%'
AND "schemaname" != 'information_schema'
SQL;
return $this->driver_query($sql);
}
// --------------------------------------------------------------------------
/**
* Retrieve foreign keys for the table
*
* @param string $table
* @return array
*/
public function get_fks($table)
{
$value_map = array(
'c' => 'CASCADE',
'r' => 'RESTRICT',
);
$keys = parent::get_fks($table);
foreach($keys as &$key)
{
foreach(array('update', 'delete') AS $type)
{
if ( ! isset($value_map[$key[$type]])) continue;
$key[$type] = $value_map[$key[$type]];
}
}
return $keys;
}
}
//End of pgsql_driver.php