414 行
10 KiB
PHP
414 行
10 KiB
PHP
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<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2017, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
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* @license http://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 3.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* Firebird/Interbase Database Adapter Class
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*
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* Note: _DB is an extender class that the app controller
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* creates dynamically based on whether the query builder
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* class is being used or not.
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*
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* @package CodeIgniter
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* @subpackage Drivers
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/database/
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*/
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class CI_DB_ibase_driver extends CI_DB {
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/**
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* Database driver
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*
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* @var string
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*/
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public $dbdriver = 'ibase';
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// --------------------------------------------------------------------
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/**
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* ORDER BY random keyword
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*
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* @var array
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*/
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protected $_random_keyword = array('RAND()', 'RAND()');
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/**
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* IBase Transaction status flag
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*
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* @var resource
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*/
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protected $_ibase_trans;
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// --------------------------------------------------------------------
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/**
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* Non-persistent database connection
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*
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* @param bool $persistent
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* @return resource
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*/
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public function db_connect($persistent = FALSE)
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{
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return ($persistent === TRUE)
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? ibase_pconnect($this->hostname.':'.$this->database, $this->username, $this->password, $this->char_set)
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: ibase_connect($this->hostname.':'.$this->database, $this->username, $this->password, $this->char_set);
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}
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// --------------------------------------------------------------------
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/**
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* Database version number
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*
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* @return string
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*/
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public function version()
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{
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if (isset($this->data_cache['version']))
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{
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return $this->data_cache['version'];
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}
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if (($service = ibase_service_attach($this->hostname, $this->username, $this->password)))
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{
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$this->data_cache['version'] = ibase_server_info($service, IBASE_SVC_SERVER_VERSION);
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// Don't keep the service open
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ibase_service_detach($service);
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return $this->data_cache['version'];
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}
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return FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* Execute the query
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*
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* @param string $sql an SQL query
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* @return resource
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*/
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protected function _execute($sql)
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{
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return ibase_query(isset($this->_ibase_trans) ? $this->_ibase_trans : $this->conn_id, $sql);
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}
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// --------------------------------------------------------------------
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/**
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* Begin Transaction
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*
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* @return bool
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*/
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protected function _trans_begin()
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{
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if (($trans_handle = ibase_trans($this->conn_id)) === FALSE)
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{
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return FALSE;
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}
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$this->_ibase_trans = $trans_handle;
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Commit Transaction
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*
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* @return bool
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*/
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protected function _trans_commit()
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{
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if (ibase_commit($this->_ibase_trans))
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{
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$this->_ibase_trans = NULL;
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return TRUE;
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}
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return FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* Rollback Transaction
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*
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* @return bool
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*/
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protected function _trans_rollback()
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{
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if (ibase_rollback($this->_ibase_trans))
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{
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$this->_ibase_trans = NULL;
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return TRUE;
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}
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return FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* Affected Rows
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*
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* @return int
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*/
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public function affected_rows()
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{
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return ibase_affected_rows($this->conn_id);
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}
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// --------------------------------------------------------------------
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/**
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* Insert ID
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*
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* @param string $generator_name
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* @param int $inc_by
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* @return int
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*/
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public function insert_id($generator_name, $inc_by = 0)
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{
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//If a generator hasn't been used before it will return 0
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return ibase_gen_id('"'.$generator_name.'"', $inc_by);
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}
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// --------------------------------------------------------------------
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/**
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* List table query
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*
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* Generates a platform-specific query string so that the table names can be fetched
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*
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* @param bool $prefix_limit
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* @return string
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*/
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protected function _list_tables($prefix_limit = FALSE)
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{
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$sql = 'SELECT TRIM("RDB$RELATION_NAME") AS TABLE_NAME FROM "RDB$RELATIONS" WHERE "RDB$RELATION_NAME" NOT LIKE \'RDB$%\' AND "RDB$RELATION_NAME" NOT LIKE \'MON$%\'';
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if ($prefix_limit !== FALSE && $this->dbprefix !== '')
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{
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return $sql.' AND TRIM("RDB$RELATION_NAME") AS TABLE_NAME LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
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.sprintf($this->_like_escape_str, $this->_like_escape_chr);
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}
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return $sql;
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}
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// --------------------------------------------------------------------
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/**
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* Show column query
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*
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* Generates a platform-specific query string so that the column names can be fetched
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*
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* @param string $table
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* @return string
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*/
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protected function _list_columns($table = '')
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{
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return 'SELECT TRIM("RDB$FIELD_NAME") AS COLUMN_NAME FROM "RDB$RELATION_FIELDS" WHERE "RDB$RELATION_NAME" = '.$this->escape($table);
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}
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// --------------------------------------------------------------------
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/**
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* Returns an object with field data
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*
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* @param string $table
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* @return array
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*/
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public function field_data($table)
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{
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$sql = 'SELECT "rfields"."RDB$FIELD_NAME" AS "name",
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CASE "fields"."RDB$FIELD_TYPE"
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WHEN 7 THEN \'SMALLINT\'
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WHEN 8 THEN \'INTEGER\'
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WHEN 9 THEN \'QUAD\'
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WHEN 10 THEN \'FLOAT\'
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WHEN 11 THEN \'DFLOAT\'
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WHEN 12 THEN \'DATE\'
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WHEN 13 THEN \'TIME\'
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WHEN 14 THEN \'CHAR\'
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WHEN 16 THEN \'INT64\'
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WHEN 27 THEN \'DOUBLE\'
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WHEN 35 THEN \'TIMESTAMP\'
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WHEN 37 THEN \'VARCHAR\'
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WHEN 40 THEN \'CSTRING\'
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WHEN 261 THEN \'BLOB\'
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ELSE NULL
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END AS "type",
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"fields"."RDB$FIELD_LENGTH" AS "max_length",
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"rfields"."RDB$DEFAULT_VALUE" AS "default"
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FROM "RDB$RELATION_FIELDS" "rfields"
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JOIN "RDB$FIELDS" "fields" ON "rfields"."RDB$FIELD_SOURCE" = "fields"."RDB$FIELD_NAME"
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WHERE "rfields"."RDB$RELATION_NAME" = '.$this->escape($table).'
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ORDER BY "rfields"."RDB$FIELD_POSITION"';
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return (($query = $this->query($sql)) !== FALSE)
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? $query->result_object()
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: FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* Error
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*
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* Returns an array containing code and message of the last
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* database error that has occurred.
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*
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* @return array
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*/
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public function error()
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{
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return array('code' => ibase_errcode(), 'message' => ibase_errmsg());
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}
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// --------------------------------------------------------------------
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/**
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* Update statement
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*
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* Generates a platform-specific update string from the supplied data
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*
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* @param string $table
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* @param array $values
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* @return string
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*/
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protected function _update($table, $values)
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{
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$this->qb_limit = FALSE;
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return parent::_update($table, $values);
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}
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// --------------------------------------------------------------------
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/**
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* Truncate statement
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*
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* Generates a platform-specific truncate string from the supplied data
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*
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* If the database does not support the TRUNCATE statement,
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* then this method maps to 'DELETE FROM table'
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*
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* @param string $table
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* @return string
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*/
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protected function _truncate($table)
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{
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return 'DELETE FROM '.$table;
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}
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// --------------------------------------------------------------------
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/**
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* Delete statement
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*
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* Generates a platform-specific delete string from the supplied data
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*
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* @param string $table
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* @return string
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*/
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protected function _delete($table)
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{
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$this->qb_limit = FALSE;
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return parent::_delete($table);
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}
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// --------------------------------------------------------------------
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/**
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* LIMIT
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*
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* Generates a platform-specific LIMIT clause
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*
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* @param string $sql SQL Query
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* @return string
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*/
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protected function _limit($sql)
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{
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// Limit clause depends on if Interbase or Firebird
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if (stripos($this->version(), 'firebird') !== FALSE)
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{
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$select = 'FIRST '.$this->qb_limit
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.($this->qb_offset ? ' SKIP '.$this->qb_offset : '');
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}
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else
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{
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$select = 'ROWS '
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.($this->qb_offset ? $this->qb_offset.' TO '.($this->qb_limit + $this->qb_offset) : $this->qb_limit);
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}
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return preg_replace('`SELECT`i', 'SELECT '.$select, $sql, 1);
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}
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// --------------------------------------------------------------------
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/**
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* Insert batch statement
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*
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* Generates a platform-specific insert string from the supplied data.
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*
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* @param string $table Table name
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* @param array $keys INSERT keys
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* @param array $values INSERT values
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* @return string|bool
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*/
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protected function _insert_batch($table, $keys, $values)
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{
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return ($this->db_debug) ? $this->display_error('db_unsupported_feature') : FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* Close DB Connection
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*
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* @return void
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*/
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protected function _close()
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{
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ibase_close($this->conn_id);
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}
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}
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