/sp_1/system/database/drivers/sqlite3/sqlite3_driver.php
PHP | 360 lines | 125 code | 46 blank | 189 comment | 10 complexity | c0aaca51e053c2caec85ac79966ce5c6 MD5 | raw file
- <?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 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 http://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
- *
- * @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);
- return $this->conn_id->exec('BEGIN TRANSACTION');
- }
- // --------------------------------------------------------------------
- /**
- * 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;
- }
- return $this->conn_id->exec('END TRANSACTION');
- }
- // --------------------------------------------------------------------
- /**
- * 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;
- }
- return $this->conn_id->exec('ROLLBACK');
- }
- // --------------------------------------------------------------------
- /**
- * Platform-dependant string escape
- *
- * @param string
- * @return string
- */
- protected function _escape_str($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)
- : '');
- }
- // --------------------------------------------------------------------
- /**
- * Show column query
- *
- * Generates a platform-specific query string so that the column names can be fetched
- *
- * @param string $table
- * @return string
- */
- protected function _list_columns($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()
- {
- 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();
- }
- }