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File: sqlite3_driver.php
<?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'); /** * SQLite3 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 Andrey Andreev * @link https://codeigniter.com/user_guide/database/ */ class CI_DB_sqlite3_driver extends CI_DB { /** * Database driver * * @var string */ public $dbdriver = 'sqlite3'; // -------------------------------------------------------------------- /** * ORDER BY random keyword * * @var array */ protected $_random_keyword = array('RANDOM()', 'RANDOM()'); // -------------------------------------------------------------------- /** * Non-persistent database connection * * @param bool $persistent * @return SQLite3 */ public function db_connect($persistent = FALSE) { if ($persistent) { log_message('debug', 'SQLite3 doesn\'t support persistent connections'); } try { return ( ! $this->password) ? new SQLite3($this->database) : new SQLite3($this->database, SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE, $this->password); } catch (Exception $e) { return FALSE; } } // -------------------------------------------------------------------- /** * Database version number * * @return string */ public function version() { if (isset($this->data_cache['version'])) { return $this->data_cache['version']; } $version = SQLite3::version(); return $this->data_cache['version'] = $version['versionString']; } // -------------------------------------------------------------------- /** * Execute the query * * @todo Implement use of SQLite3::querySingle(), if needed * @param string $sql * @return mixed SQLite3Result object or bool */ protected function _execute($sql) { return $this->is_write_type($sql) ? $this->conn_id->exec($sql) : $this->conn_id->query($sql); } // -------------------------------------------------------------------- /** * Begin Transaction * * @return bool */ protected function _trans_begin() { return $this->conn_id->exec('BEGIN TRANSACTION'); } // -------------------------------------------------------------------- /** * Commit Transaction * * @return bool */ protected function _trans_commit() { return $this->conn_id->exec('END TRANSACTION'); } // -------------------------------------------------------------------- /** * Rollback Transaction * * @return bool */ protected function _trans_rollback() { return $this->conn_id->exec('ROLLBACK'); } // -------------------------------------------------------------------- /** * Platform-dependent string escape * * @param string * @return string */ protected function _escape_str($str) { return $this->conn_id->escapeString($str); } // -------------------------------------------------------------------- /** * Affected Rows * * @return int */ public function affected_rows() { return $this->conn_id->changes(); } // -------------------------------------------------------------------- /** * Insert ID * * @return int */ public function insert_id() { return $this->conn_id->lastInsertRowID(); } // -------------------------------------------------------------------- /** * 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) { return 'SELECT "NAME" FROM "SQLITE_MASTER" WHERE "TYPE" = \'table\'' .(($prefix_limit !== FALSE && $this->dbprefix != '') ? ' AND "NAME" LIKE \''.$this->escape_like_str($this->dbprefix).'%\' '.sprintf($this->_like_escape_str, $this->_like_escape_chr) : ''); } // -------------------------------------------------------------------- /** * 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; } // -------------------------------------------------------------------- /** * Error * * Returns an array containing code and message of the last * database error that has occurred. * * @return array */ public function error() { return array('code' => $this->conn_id->lastErrorCode(), 'message' => $this->conn_id->lastErrorMsg()); } // -------------------------------------------------------------------- /** * 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 method 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() { $this->conn_id->close(); } }