310 行
8.3 KiB
PHP
310 行
8.3 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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* PDO Informix 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_pdo_informix_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 = 'informix';
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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('ASC', 'ASC'); // Currently not supported
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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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$this->dsn = 'informix:';
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// Pre-defined DSN
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if (empty($this->hostname) && empty($this->host) && empty($this->port) && empty($this->service))
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{
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if (isset($this->DSN))
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{
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$this->dsn .= 'DSN='.$this->DSN;
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}
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elseif ( ! empty($this->database))
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{
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$this->dsn .= 'DSN='.$this->database;
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}
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return;
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}
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if (isset($this->host))
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{
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$this->dsn .= 'host='.$this->host;
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}
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else
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{
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$this->dsn .= 'host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
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}
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if (isset($this->service))
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{
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$this->dsn .= '; service='.$this->service;
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}
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elseif ( ! empty($this->port))
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{
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$this->dsn .= '; service='.$this->port;
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}
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empty($this->database) OR $this->dsn .= '; database='.$this->database;
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empty($this->server) OR $this->dsn .= '; server='.$this->server;
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$this->dsn .= '; protocol='.(isset($this->protocol) ? $this->protocol : 'onsoctcp')
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.'; EnableScrollableCursors=1';
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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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$sql = 'SELECT "tabname" FROM "systables"
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WHERE "tabid" > 99 AND "tabtype" = \'T\' AND LOWER("owner") = '.$this->escape(strtolower($this->username));
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if ($prefix_limit === TRUE && $this->dbprefix !== '')
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{
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$sql .= ' AND "tabname" 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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if (strpos($table, '.') !== FALSE)
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{
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sscanf($table, '%[^.].%s', $owner, $table);
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}
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else
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{
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$owner = $this->username;
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}
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return 'SELECT "colname" FROM "systables", "syscolumns"
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WHERE "systables"."tabid" = "syscolumns"."tabid"
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AND "systables"."tabtype" = \'T\'
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AND LOWER("systables"."owner") = '.$this->escape(strtolower($owner)).'
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AND LOWER("systables"."tabname") = '.$this->escape(strtolower($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 "syscolumns"."colname" AS "name",
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CASE "syscolumns"."coltype"
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WHEN 0 THEN \'CHAR\'
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WHEN 1 THEN \'SMALLINT\'
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WHEN 2 THEN \'INTEGER\'
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WHEN 3 THEN \'FLOAT\'
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WHEN 4 THEN \'SMALLFLOAT\'
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WHEN 5 THEN \'DECIMAL\'
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WHEN 6 THEN \'SERIAL\'
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WHEN 7 THEN \'DATE\'
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WHEN 8 THEN \'MONEY\'
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WHEN 9 THEN \'NULL\'
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WHEN 10 THEN \'DATETIME\'
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WHEN 11 THEN \'BYTE\'
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WHEN 12 THEN \'TEXT\'
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WHEN 13 THEN \'VARCHAR\'
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WHEN 14 THEN \'INTERVAL\'
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WHEN 15 THEN \'NCHAR\'
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WHEN 16 THEN \'NVARCHAR\'
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WHEN 17 THEN \'INT8\'
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WHEN 18 THEN \'SERIAL8\'
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WHEN 19 THEN \'SET\'
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WHEN 20 THEN \'MULTISET\'
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WHEN 21 THEN \'LIST\'
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WHEN 22 THEN \'Unnamed ROW\'
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WHEN 40 THEN \'LVARCHAR\'
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WHEN 41 THEN \'BLOB/CLOB/BOOLEAN\'
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WHEN 4118 THEN \'Named ROW\'
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ELSE "syscolumns"."coltype"
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END AS "type",
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"syscolumns"."collength" as "max_length",
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CASE "sysdefaults"."type"
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WHEN \'L\' THEN "sysdefaults"."default"
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ELSE NULL
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END AS "default"
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FROM "syscolumns", "systables", "sysdefaults"
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WHERE "syscolumns"."tabid" = "systables"."tabid"
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AND "systables"."tabid" = "sysdefaults"."tabid"
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AND "syscolumns"."colno" = "sysdefaults"."colno"
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AND "systables"."tabtype" = \'T\'
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AND LOWER("systables"."owner") = '.$this->escape(strtolower($this->username)).'
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AND LOWER("systables"."tabname") = '.$this->escape(strtolower($table)).'
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ORDER BY "syscolumns"."colno"';
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return (($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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$this->qb_orderby = array();
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return parent::_update($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 'TRUNCATE TABLE ONLY '.$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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$select = 'SELECT '.($this->qb_offset ? 'SKIP '.$this->qb_offset : '').'FIRST '.$this->qb_limit.' ';
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return preg_replace('/^(SELECT\s)/i', $select, $sql, 1);
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}
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}
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