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<?php/*** CodeIgniter** An open source application development framework for PHP** This content is released under the MIT License (MIT)** Copyright (c) 2014 - 2017, 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 - 2017, British Columbia Institute of Technology (http://bcit.ca/)* @license http://opensource.org/licenses/MIT MIT License* @link https://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 https://codeigniter.com/user_guide/database/*/class CI_DB_odbc_driver extends CI_DB_driver {/*** 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)');// --------------------------------------------------------------------/*** ODBC result ID resource returned from odbc_prepare()** @var resource*/private $odbc_result;/*** Values to use with odbc_execute() for prepared statements** @var array*/private $binds = array();// --------------------------------------------------------------------/*** Class constructor** @param array $params* @return void*/public function __construct($params){parent::__construct($params);// Legacy support for DSN in the hostname fieldif (empty($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);}// --------------------------------------------------------------------/*** Compile Bindings** @param string $sql SQL statement* @param array $binds An array of values to bind* @return string*/public function compile_binds($sql, $binds){if (empty($binds) OR empty($this->bind_marker) OR strpos($sql, $this->bind_marker) === FALSE){return $sql;}elseif ( ! is_array($binds)){$binds = array($binds);$bind_count = 1;}else{// Make sure we're using numeric keys$binds = array_values($binds);$bind_count = count($binds);}// We'll need the marker length later$ml = strlen($this->bind_marker);// Make sure not to replace a chunk inside a string that happens to match the bind markerif ($c = preg_match_all("/'[^']*'|\"[^\"]*\"/i", $sql, $matches)){$c = preg_match_all('/'.preg_quote($this->bind_marker, '/').'/i',str_replace($matches[0],str_replace($this->bind_marker, str_repeat(' ', $ml), $matches[0]),$sql, $c),$matches, PREG_OFFSET_CAPTURE);// Bind values' count must match the count of markers in the queryif ($bind_count !== $c){return $sql;}}elseif (($c = preg_match_all('/'.preg_quote($this->bind_marker, '/').'/i', $sql, $matches, PREG_OFFSET_CAPTURE)) !== $bind_count){return $sql;}if ($this->bind_marker !== '?'){do{$c--;$sql = substr_replace($sql, '?', $matches[0][$c][1], $ml);}while ($c !== 0);}if (FALSE !== ($this->odbc_result = odbc_prepare($this->conn_id, $sql))){$this->binds = array_values($binds);}return $sql;}// --------------------------------------------------------------------/*** Execute the query** @param string $sql an SQL query* @return resource*/protected function _execute($sql){if ( ! isset($this->odbc_result)){return odbc_exec($this->conn_id, $sql);}elseif ($this->odbc_result === FALSE){return FALSE;}if (TRUE === ($success = odbc_execute($this->odbc_result, $this->binds))){// For queries that return result sets, return the result_id resource on success$this->is_write_type($sql) OR $success = $this->odbc_result;}$this->odbc_result = NULL;$this->binds = array();return $success;}// --------------------------------------------------------------------/*** Begin Transaction** @return bool*/protected function _trans_begin(){return odbc_autocommit($this->conn_id, FALSE);}// --------------------------------------------------------------------/*** Commit Transaction** @return bool*/protected function _trans_commit(){if (odbc_commit($this->conn_id)){odbc_autocommit($this->conn_id, TRUE);return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Rollback Transaction** @return bool*/protected function _trans_rollback(){if (odbc_rollback($this->conn_id)){odbc_autocommit($this->conn_id, TRUE);return TRUE;}return FALSE;}// --------------------------------------------------------------------/*** Determines if a query is a "write" type.** @param string An SQL query string* @return bool*/public function is_write_type($sql){if (preg_match('#^(INSERT|UPDATE).*RETURNING\s.+(\,\s?.+)*$#is', $sql)){return FALSE;}return parent::is_write_type($sql);}// --------------------------------------------------------------------/*** Platform-dependent string escape** @param string* @return string*/protected function _escape_str($str){$this->display_error('db_unsupported_feature');}// --------------------------------------------------------------------/*** 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_debug) ? $this->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 '.$table;}// --------------------------------------------------------------------/*** Error** Returns an array containing code and message of the last* database error that has occurred.** @return array*/public function error(){return array('code' => odbc_error($this->conn_id), 'message' => odbc_errormsg($this->conn_id));}// --------------------------------------------------------------------/*** Close DB Connection** @return void*/protected function _close(){odbc_close($this->conn_id);}}