279 行
7.6 KiB
PHP
279 行
7.6 KiB
PHP
<?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 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://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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* PDO Firebird 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/userguide3/database/
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*/
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class CI_DB_pdo_firebird_driver extends CI_DB_pdo_driver {
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/**
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* Sub-driver
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*
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* @var string
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*/
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public $subdriver = 'firebird';
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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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/**
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* Class constructor
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*
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* Builds the DSN if not already set.
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*
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* @param array $params
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* @return void
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*/
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public function __construct($params)
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{
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parent::__construct($params);
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if (empty($this->dsn))
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{
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$this->dsn = 'firebird:';
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if ( ! empty($this->database))
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{
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$this->dsn .= 'dbname='.$this->database;
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}
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elseif ( ! empty($this->hostname))
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{
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$this->dsn .= 'dbname='.$this->hostname;
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}
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empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
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empty($this->role) OR $this->dsn .= ';role='.$this->role;
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}
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elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 9) === FALSE)
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{
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$this->dsn .= ';charset='.$this->char_set;
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}
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}
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// --------------------------------------------------------------------
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/**
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* Show 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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$sql = 'SELECT "RDB$RELATION_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 === TRUE && $this->dbprefix !== '')
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{
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return $sql.' AND "RDB$RELATION_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 "RDB$FIELD_NAME" FROM "RDB$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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* 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 > 0 ? ' 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 > 0 ? $this->qb_offset.' TO '.($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);
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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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