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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
*
* Licensed under the Open Software License version 3.0
*
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
* http://opensource.org/licenses/OSL-3.0
* If you did not receive a copy of the license and are unable to obtain it
* through the world wide web, please send an email to
* licensing@ellislab.com so we can send you a copy immediately.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
* @link http://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
/**
* PDO SQLite Database Adapter Class
*
* Note: _DB is an extender class that the app controller
* creates dynamically based on whether the query builder
* class is being used or not.
*
* @package CodeIgniter
* @subpackage Drivers
* @category Database
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
class CI_DB_pdo_sqlite_driver extends CI_DB_pdo_driver {
public $subdriver = 'sqlite';
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
* used for the count_all() and count_all_results() functions.
*/
protected $_random_keyword = ' RANDOM()'; // Currently not supported
/**
* Constructor
*
* Builds the DSN if not already set.
*
* @param array
* @return void
*/
public function __construct($params)
{
parent::__construct($params);
if (empty($this->dsn))
{
$this->dsn = 'sqlite:';
if (empty($this->database) && empty($this->hostname))
{
$this->database = ':memory:';
}
$this->database = empty($this->database) ? $this->hostname : $this->database;
}
}
// --------------------------------------------------------------------
/**
* Show table query
*
* Generates a platform-specific query string so that the table names can be fetched
*
* @param bool
* @return string
*/
protected function _list_tables($prefix_limit = FALSE)
{
$sql = 'SELECT "NAME" FROM "SQLITE_MASTER" WHERE "TYPE" = \'table\'';
if ($prefix_limit === TRUE && $this->dbprefix !== '')
{
return $sql.' AND "NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
.sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
return $sql;
}
// --------------------------------------------------------------------
/**
* Show column query
*
* Generates a platform-specific query string so that the column names can be fetched
*
* @param string the table name
* @return string
*/
protected function _list_columns($table = '')
{
// Not supported
return FALSE;
}
// --------------------------------------------------------------------
/**
* Field data query
*
* Generates a platform-specific query so that the column data can be retrieved
*
* @param string the table name
* @return string
*/
protected function _field_data($table)
{
return 'SELECT * FROM '.$this->protect_identifiers($table).' LIMIT 0,1';
}
// --------------------------------------------------------------------
/**
* Replace statement
*
* @param string the table name
* @param array the insert keys
* @param array the insert values
* @return string
*/
protected function _replace($table, $keys, $values)
{
return 'INSERT OR '.parent::_replace($table, $keys, $values);
}
// --------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
*
* If the database does not support the truncate() command,
* then this method maps to 'DELETE FROM table'
*
* @param string the table name
* @return string
*/
protected function _truncate($table)
{
return 'DELETE FROM '.$table;
}
}
/* End of file pdo_sqlite_driver.php */
/* Location: ./system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php */
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