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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 - 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'); /** * PDO IBM DB2 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_ibm_driver extends CI_DB_pdo_driver { /** * Sub-driver * * @var string */ public $subdriver = 'ibm'; // -------------------------------------------------------------------- /** * 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)) { $this->dsn = 'ibm:'; // Pre-defined DSN if (empty($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; } $this->dsn .= 'DRIVER='.(isset($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;'); } } // -------------------------------------------------------------------- /** * 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) { $sql = 'SELECT "tabname" FROM "syscat"."tables" WHERE "type" = \'T\' AND LOWER("tabschema") = '.$this->escape(strtolower($this->database)); if ($prefix_limit === TRUE && $this->dbprefix !== '') { $sql .= ' AND "tabname" LIKE \''.$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 $table * @return array */ protected function _list_columns($table = '') { return 'SELECT "colname" FROM "syscat"."columns" WHERE LOWER("tabschema") = '.$this->escape(strtolower($this->database)).' AND LOWER("tabname") = '.$this->escape(strtolower($table)); } // -------------------------------------------------------------------- /** * Returns an object with field data * * @param string $table * @return array */ public function field_data($table) { $sql = 'SELECT "colname" AS "name", "typename" AS "type", "default" AS "default", "length" AS "max_length", CASE "keyseq" WHEN NULL THEN 0 ELSE 1 END AS "primary_key" FROM "syscat"."columns" WHERE LOWER("tabschema") = '.$this->escape(strtolower($this->database)).' AND LOWER("tabname") = '.$this->escape(strtolower($table)).' ORDER BY "colno"'; return (($query = $this->query($sql)) !== FALSE) ? $query->result_object() : FALSE; } // -------------------------------------------------------------------- /** * 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); } // -------------------------------------------------------------------- /** * 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); } // -------------------------------------------------------------------- /** * LIMIT * * Generates a platform-specific LIMIT clause * * @param string $sql SQL Query * @return string */ protected function _limit($sql) { $sql .= ' FETCH FIRST '.($this->qb_limit + $this->qb_offset).' ROWS ONLY'; return ($this->qb_offset) ? 'SELECT * FROM ('.$sql.') WHERE rownum > '.$this->qb_offset : $sql; } }