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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 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/) * @license https://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'); /** * PDO 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_pdo_odbc_driver extends CI_DB_pdo_driver { /** * Sub-driver * * @var string */ public $subdriver = '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 * * Builds the DSN if not already set. * * @param array $params * @return void */ public function __construct($params) { parent::__construct($params); if (empty($this->dsn)) { $this->dsn = 'odbc:'; // Pre-defined DSN if (empty($this->hostname) && empty($this->HOSTNAME) && empty($this->port) && empty($this->PORT)) { if (isset($this->DSN)) { $this->dsn .= 'DSN='.$this->DSN; } elseif ( ! empty($this->database)) { $this->dsn .= 'DSN='.$this->database; } return; } // If the DSN is not pre-configured - try to build an IBM DB2 connection string $this->dsn .= 'DRIVER='.(isset($this->DRIVER) ? '{'.$this->DRIVER.'}' : '{IBM DB2 ODBC DRIVER}').';'; if (isset($this->DATABASE)) { $this->dsn .= 'DATABASE='.$this->DATABASE.';'; } elseif ( ! empty($this->database)) { $this->dsn .= 'DATABASE='.$this->database.';'; } if (isset($this->HOSTNAME)) { $this->dsn .= 'HOSTNAME='.$this->HOSTNAME.';'; } else { $this->dsn .= 'HOSTNAME='.(empty($this->hostname) ? '127.0.0.1;' : $this->hostname.';'); } if (isset($this->PORT)) { $this->dsn .= 'PORT='.$this->port.';'; } elseif ( ! empty($this->port)) { $this->dsn .= ';PORT='.$this->port.';'; } $this->dsn .= 'PROTOCOL='.(isset($this->PROTOCOL) ? $this->PROTOCOL.';' : 'TCPIP;'); } } // -------------------------------------------------------------------- /** * Platform-dependent string escape * * @param string * @return string */ protected function _escape_str($str) { $this->display_error('db_unsupported_feature'); } // -------------------------------------------------------------------- /** * Determines if a query is a "write" type. * * @param string An SQL query string * @return bool */ public function is_write_type($sql) { if (preg_match('#^(INSERT|UPDATE).*RETURNING\s.+(\,\s?.+)*$#is', $sql)) { return FALSE; } return parent::is_write_type($sql); } // -------------------------------------------------------------------- /** * 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 'SELECT column_name FROM information_schema.columns WHERE table_name = '.$this->escape($table); } }
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