<?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'); /** * ODBC 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_odbc_driver extends CI_DB { /** * Database driver * * @var string */ public $dbdriver = 'odbc'; /** * Database schema * * @var string */ public $schema = 'public'; // -------------------------------------------------------------------- /** * Identifier escape character * * Must be empty for ODBC. * * @var string */ protected $_escape_char = ''; /** * ESCAPE statement string * * @var string */ protected $_like_escape_str = " {escape '%s'} "; /** * ORDER BY random keyword * * @var array */ protected $_random_keyword = array('RND()', 'RND(%d)'); // -------------------------------------------------------------------- /** * Class constructor * * @param array $params * @return void */ public function __construct($params) { parent::__construct($params); // Legacy support for DSN in the hostname field if (empty($this->dsn)) { $this->dsn = $this->hostname; } } // -------------------------------------------------------------------- /** * Non-persistent database connection * * @param bool $persistent * @return resource */ public function db_connect($persistent = FALSE) { return ($persistent === TRUE) ? odbc_pconnect($this->dsn, $this->username, $this->password) : odbc_connect($this->dsn, $this->username, $this->password); } // -------------------------------------------------------------------- /** * Execute the query * * @param string $sql an SQL query * @return resource */ protected function _execute($sql) { return odbc_exec($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); return odbc_autocommit($this->conn_id, FALSE); } // -------------------------------------------------------------------- /** * 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; } $ret = odbc_commit($this->conn_id); odbc_autocommit($this->conn_id, TRUE); return $ret; } // -------------------------------------------------------------------- /** * 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; } $ret = odbc_rollback($this->conn_id); odbc_autocommit($this->conn_id, TRUE); return $ret; } // -------------------------------------------------------------------- /** * Platform-dependant string escape * * @param string * @return string */ protected function _escape_str($str) { return remove_invisible_characters($str); } // -------------------------------------------------------------------- /** * Affected Rows * * @return int */ public function affected_rows() { return odbc_num_rows($this->result_id); } // -------------------------------------------------------------------- /** * Insert ID * * @return bool */ public function insert_id() { return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE; } // -------------------------------------------------------------------- /** * 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) { $sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = '".$this->schema."'"; if ($prefix_limit !== FALSE && $this->dbprefix !== '') { return $sql." AND table_name LIKE '".$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 $table * @return string */ protected function _list_columns($table = '') { return 'SHOW COLUMNS FROM '.$table; } // -------------------------------------------------------------------- /** * Field data query * * Generates a platform-specific query so that the column data can be retrieved * * @param string $table * @return string */ protected function _field_data($table) { return 'SELECT TOP 1 FROM '.$table; } // -------------------------------------------------------------------- /** * Error * * Returns an array containing code and message of the last * database error that has occured. * * @return array */ public function error() { return array('code' => odbc_error($this->conn_id), 'message' => odbc_errormsg($this->conn_id)); } // -------------------------------------------------------------------- /** * Update statement * * Generates a platform-specific update string from the supplied data * * @param string $table * @param array $values * @return string */ protected function _update($table, $values) { $this->qb_limit = FALSE; $this->qb_orderby = array(); return parent::_update($table, $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; } // -------------------------------------------------------------------- /** * Delete statement * * Generates a platform-specific delete string from the supplied data * * @param string $table * @return string */ protected function _delete($table) { $this->qb_limit = FALSE; return parent::_delete($table); } // -------------------------------------------------------------------- /** * Close DB Connection * * @return void */ protected function _close() { odbc_close($this->conn_id); } }