358 lines
8.6 KiB
PHP
358 lines
8.6 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* CodeIgniter
|
||
|
|
*
|
||
|
|
* An open source application development framework for PHP
|
||
|
|
*
|
||
|
|
* This content is released under the MIT License (MIT)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2014 - 2015, 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. (http://ellislab.com/)
|
||
|
|
* @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
|
||
|
|
* @license http://opensource.org/licenses/MIT MIT License
|
||
|
|
* @link http://codeigniter.com
|
||
|
|
* @since Version 1.3.0
|
||
|
|
* @filesource
|
||
|
|
*/
|
||
|
|
defined('BASEPATH') OR exit('No direct script access allowed');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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_sqlite_driver extends CI_DB {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database driver
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
public $dbdriver = 'sqlite';
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ORDER BY random keyword
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
protected $_random_keyword = array('RANDOM()', 'RANDOM()');
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Non-persistent database connection
|
||
|
|
*
|
||
|
|
* @param bool $persistent
|
||
|
|
* @return resource
|
||
|
|
*/
|
||
|
|
public function db_connect($persistent = FALSE)
|
||
|
|
{
|
||
|
|
$error = NULL;
|
||
|
|
$conn_id = ($persistent === TRUE)
|
||
|
|
? sqlite_popen($this->database, 0666, $error)
|
||
|
|
: sqlite_open($this->database, 0666, $error);
|
||
|
|
|
||
|
|
isset($error) && log_message('error', $error);
|
||
|
|
|
||
|
|
return $conn_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database version number
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function version()
|
||
|
|
{
|
||
|
|
return isset($this->data_cache['version'])
|
||
|
|
? $this->data_cache['version']
|
||
|
|
: $this->data_cache['version'] = sqlite_libversion();
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Execute the query
|
||
|
|
*
|
||
|
|
* @param string $sql an SQL query
|
||
|
|
* @return resource
|
||
|
|
*/
|
||
|
|
protected function _execute($sql)
|
||
|
|
{
|
||
|
|
return $this->is_write_type($sql)
|
||
|
|
? sqlite_exec($this->conn_id, $sql)
|
||
|
|
: sqlite_query($this->conn_id, $sql);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Begin Transaction
|
||
|
|
*
|
||
|
|
* @param bool $test_mode
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
public function trans_begin($test_mode = FALSE)
|
||
|
|
{
|
||
|
|
// When transactions are nested we only begin/commit/rollback the outermost ones
|
||
|
|
if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
|
||
|
|
{
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Reset the transaction failure flag.
|
||
|
|
// If the $test_mode flag is set to TRUE transactions will be rolled back
|
||
|
|
// even if the queries produce a successful result.
|
||
|
|
$this->_trans_failure = ($test_mode === TRUE);
|
||
|
|
|
||
|
|
$this->simple_query('BEGIN TRANSACTION');
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Commit Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
public function trans_commit()
|
||
|
|
{
|
||
|
|
// When transactions are nested we only begin/commit/rollback the outermost ones
|
||
|
|
if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
|
||
|
|
{
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->simple_query('COMMIT');
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Rollback Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
public function trans_rollback()
|
||
|
|
{
|
||
|
|
// When transactions are nested we only begin/commit/rollback the outermost ones
|
||
|
|
if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
|
||
|
|
{
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->simple_query('ROLLBACK');
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Platform-dependant string escape
|
||
|
|
*
|
||
|
|
* @param string
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected function _escape_str($str)
|
||
|
|
{
|
||
|
|
return sqlite_escape_string($str);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Affected Rows
|
||
|
|
*
|
||
|
|
* @return int
|
||
|
|
*/
|
||
|
|
public function affected_rows()
|
||
|
|
{
|
||
|
|
return sqlite_changes($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Insert ID
|
||
|
|
*
|
||
|
|
* @return int
|
||
|
|
*/
|
||
|
|
public function insert_id()
|
||
|
|
{
|
||
|
|
return sqlite_last_insert_rowid($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* List 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 !== FALSE && $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 $table
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _list_columns($table = '')
|
||
|
|
{
|
||
|
|
// Not supported
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Error
|
||
|
|
*
|
||
|
|
* Returns an array containing code and message of the last
|
||
|
|
* database error that has occured.
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function error()
|
||
|
|
{
|
||
|
|
$error = array('code' => sqlite_last_error($this->conn_id));
|
||
|
|
$error['message'] = sqlite_error_string($error['code']);
|
||
|
|
return $error;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Replace statement
|
||
|
|
*
|
||
|
|
* Generates a platform-specific replace string from the supplied data
|
||
|
|
*
|
||
|
|
* @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 function maps to 'DELETE FROM table'
|
||
|
|
*
|
||
|
|
* @param string $table
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected function _truncate($table)
|
||
|
|
{
|
||
|
|
return 'DELETE FROM '.$table;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Close DB Connection
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
protected function _close()
|
||
|
|
{
|
||
|
|
sqlite_close($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|