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<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2018, British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
* @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
* @license http://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* 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 https://codeigniter.com/user_guide/database/
*/
class CI_DB_pdo_sqlite_driver extends CI_DB_pdo_driver {
/**
* Sub-driver
*
* @var string
*/
public $subdriver = 'sqlite';
// --------------------------------------------------------------------
/**
* ORDER BY random keyword
*
* @var array
*/
protected $_random_keyword = array('RANDOM()', 'RANDOM()');
// --------------------------------------------------------------------
/**
* Class constructor
*
* Builds the DSN if not already set.
*
* @param array $params
* @return void
*/
public function __construct($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 $prefix_limit
* @return string
*/
protected function _list_tables($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;
}
// --------------------------------------------------------------------
/**
* Fetch Field Names
*
* @param string $table Table name
* @return array
*/
public function list_fields($table)
{
// Is there a cached result?
if (isset($this->data_cache['field_names'][$table]))
{
return $this->data_cache['field_names'][$table];
}
if (($result = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE)
{
return FALSE;
}
$this->data_cache['field_names'][$table] = array();
foreach ($result->result_array() as $row)
{
$this->data_cache['field_names'][$table][] = $row['name'];
}
return $this->data_cache['field_names'][$table];
}
// --------------------------------------------------------------------
/**
* Returns an object with field data
*
* @param string $table
* @return array
*/
public function field_data($table)
{
if (($query = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE)
{
return FALSE;
}
$query = $query->result_array();
if (empty($query))
{
return FALSE;
}
$retval = array();
for ($i = 0, $c = count($query); $i < $c; $i++)
{
$retval[$i] = new stdClass();
$retval[$i]->name = $query[$i]['name'];
$retval[$i]->type = $query[$i]['type'];
$retval[$i]->max_length = NULL;
$retval[$i]->default = $query[$i]['dflt_value'];
$retval[$i]->primary_key = isset($query[$i]['pk']) ? (int) $query[$i]['pk'] : 0;
}
return $retval;
}
// --------------------------------------------------------------------
/**
* Replace statement
*
* @param string $table Table name
* @param array $keys INSERT keys
* @param array $values INSERT values
* @return string
*/
protected function _replace($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 statement,
* then this method maps to 'DELETE FROM table'
*
* @param string $table
* @return string
*/
protected function _truncate($table)
{
return 'DELETE FROM '.$table;
}
}
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