354 lines
8.1 KiB
PHP
354 lines
8.1 KiB
PHP
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<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.2.4 or newer
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*
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* NOTICE OF LICENSE
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*
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* Licensed under the Open Software License version 3.0
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*
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* This source file is subject to the Open Software License (OSL 3.0) that is
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* bundled with this package in the files license.txt / license.rst. It is
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* also available through the world wide web at this URL:
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* http://opensource.org/licenses/OSL-3.0
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* If you did not receive a copy of the license and are unable to obtain it
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* through the world wide web, please send an email to
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* licensing@ellislab.com so we can send you a copy immediately.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
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* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* SQLite Database Adapter Class
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*
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* Note: _DB is an extender class that the app controller
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* creates dynamically based on whether the query builder
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* class is being used or not.
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*
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* @package CodeIgniter
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* @subpackage Drivers
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* @category Database
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* @author EllisLab Dev Team
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* @link http://codeigniter.com/user_guide/database/
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*/
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class CI_DB_sqlite_driver extends CI_DB {
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/**
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* Database driver
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*
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* @var string
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*/
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public $dbdriver = 'sqlite';
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// --------------------------------------------------------------------
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/**
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* ORDER BY random keyword
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*
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* @var array
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*/
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protected $_random_keyword = array('RANDOM()', 'RANDOM()');
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// --------------------------------------------------------------------
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/**
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* Non-persistent database connection
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*
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* @param bool $persistent
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* @return resource
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*/
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public function db_connect($persistent = FALSE)
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{
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$error = NULL;
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$conn_id = ($persistent === TRUE)
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? sqlite_popen($this->database, 0666, $error)
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: sqlite_open($this->database, 0666, $error);
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isset($error) && log_message('error', $error);
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return $conn_id;
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}
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// --------------------------------------------------------------------
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/**
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* Database version number
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*
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* @return string
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*/
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public function version()
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{
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return isset($this->data_cache['version'])
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? $this->data_cache['version']
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: $this->data_cache['version'] = sqlite_libversion();
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}
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// --------------------------------------------------------------------
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/**
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* Execute the query
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*
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* @param string $sql an SQL query
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* @return resource
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*/
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protected function _execute($sql)
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{
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return $this->is_write_type($sql)
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? sqlite_exec($this->conn_id, $sql)
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: sqlite_query($this->conn_id, $sql);
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}
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// --------------------------------------------------------------------
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/**
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* Begin Transaction
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*
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* @param bool $test_mode
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* @return bool
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*/
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public function trans_begin($test_mode = FALSE)
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{
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// When transactions are nested we only begin/commit/rollback the outermost ones
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if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
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{
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return TRUE;
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}
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// Reset the transaction failure flag.
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// If the $test_mode flag is set to TRUE transactions will be rolled back
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// even if the queries produce a successful result.
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$this->_trans_failure = ($test_mode === TRUE);
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$this->simple_query('BEGIN TRANSACTION');
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Commit Transaction
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*
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* @return bool
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*/
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public function trans_commit()
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{
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// When transactions are nested we only begin/commit/rollback the outermost ones
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if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
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{
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return TRUE;
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}
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$this->simple_query('COMMIT');
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Rollback Transaction
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*
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* @return bool
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*/
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public function trans_rollback()
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{
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// When transactions are nested we only begin/commit/rollback the outermost ones
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if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
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{
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return TRUE;
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}
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$this->simple_query('ROLLBACK');
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Platform-dependant string escape
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*
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* @param string
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* @return string
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*/
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protected function _escape_str($str)
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{
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return sqlite_escape_string($str);
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}
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// --------------------------------------------------------------------
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/**
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* Affected Rows
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*
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* @return int
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*/
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public function affected_rows()
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{
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return sqlite_changes($this->conn_id);
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}
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// --------------------------------------------------------------------
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/**
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* Insert ID
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*
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* @return int
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*/
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public function insert_id()
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{
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return sqlite_last_insert_rowid($this->conn_id);
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}
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// --------------------------------------------------------------------
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/**
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* List table query
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*
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* Generates a platform-specific query string so that the table names can be fetched
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*
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* @param bool $prefix_limit
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* @return string
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*/
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protected function _list_tables($prefix_limit = FALSE)
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{
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$sql = "SELECT name FROM sqlite_master WHERE type='table'";
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if ($prefix_limit !== FALSE && $this->dbprefix != '')
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{
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return $sql." AND 'name' LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
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}
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return $sql;
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}
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// --------------------------------------------------------------------
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/**
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* Show column query
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*
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* Generates a platform-specific query string so that the column names can be fetched
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*
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* @param string $table
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* @return bool
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*/
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protected function _list_columns($table = '')
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{
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// Not supported
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return FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* Returns an object with field data
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*
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* @param string $table
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* @return array
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*/
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public function field_data($table = '')
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{
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if ($table === '')
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{
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return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
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}
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if (($query = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE)
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{
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return FALSE;
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}
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$query = $query->result_array();
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if (empty($query))
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{
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return FALSE;
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}
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$retval = array();
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for ($i = 0, $c = count($query); $i < $c; $i++)
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{
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$retval[$i] = new stdClass();
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$retval[$i]->name = $query[$i]['name'];
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$retval[$i]->type = $query[$i]['type'];
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$retval[$i]->max_length = NULL;
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$retval[$i]->default = $query[$i]['dflt_value'];
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$retval[$i]->primary_key = isset($query[$i]['pk']) ? (int) $query[$i]['pk'] : 0;
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}
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return $retval;
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}
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// --------------------------------------------------------------------
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/**
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* Error
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*
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* Returns an array containing code and message of the last
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* database error that has occured.
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*
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* @return array
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*/
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public function error()
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{
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$error = array('code' => sqlite_last_error($this->conn_id));
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$error['message'] = sqlite_error_string($error['code']);
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return $error;
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}
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// --------------------------------------------------------------------
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/**
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* Replace statement
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*
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* Generates a platform-specific replace string from the supplied data
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*
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* @param string $table Table name
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* @param array $keys INSERT keys
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* @param array $values INSERT values
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* @return string
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*/
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protected function _replace($table, $keys, $values)
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{
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return 'INSERT OR '.parent::_replace($table, $keys, $values);
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}
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// --------------------------------------------------------------------
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/**
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* Truncate statement
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*
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* Generates a platform-specific truncate string from the supplied data
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*
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* If the database does not support the TRUNCATE statement,
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* then this function maps to 'DELETE FROM table'
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*
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* @param string $table
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* @return string
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*/
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protected function _truncate($table)
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{
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return 'DELETE FROM '.$table;
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}
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// --------------------------------------------------------------------
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/**
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* Close DB Connection
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*
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* @return void
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*/
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protected function _close()
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{
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sqlite_close($this->conn_id);
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}
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}
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/* End of file sqlite_driver.php */
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/* Location: ./system/database/drivers/sqlite/sqlite_driver.php */
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