2731 lines
60 KiB
PHP
2731 lines
60 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 - 2015, 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. (http://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2015, 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 http://codeigniter.com
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* @since Version 1.0.0
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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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* Query Builder Class
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*
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* This is the platform-independent base Query Builder implementation class.
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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 http://codeigniter.com/user_guide/database/
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*/
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abstract class CI_DB_query_builder extends CI_DB_driver {
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/**
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* Return DELETE SQL flag
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*
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* @var bool
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*/
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protected $return_delete_sql = FALSE;
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/**
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* Reset DELETE data flag
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*
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* @var bool
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*/
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protected $reset_delete_data = FALSE;
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/**
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* QB SELECT data
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*
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* @var array
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*/
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protected $qb_select = array();
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/**
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* QB DISTINCT flag
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*
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* @var bool
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*/
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protected $qb_distinct = FALSE;
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/**
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* QB FROM data
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*
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* @var array
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*/
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protected $qb_from = array();
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/**
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* QB JOIN data
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*
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* @var array
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*/
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protected $qb_join = array();
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/**
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* QB WHERE data
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*
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* @var array
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*/
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protected $qb_where = array();
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/**
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* QB GROUP BY data
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*
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* @var array
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*/
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protected $qb_groupby = array();
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/**
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* QB HAVING data
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*
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* @var array
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*/
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protected $qb_having = array();
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/**
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* QB keys
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*
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* @var array
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*/
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protected $qb_keys = array();
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/**
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* QB LIMIT data
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*
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* @var int
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*/
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protected $qb_limit = FALSE;
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/**
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* QB OFFSET data
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*
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* @var int
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*/
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protected $qb_offset = FALSE;
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/**
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* QB ORDER BY data
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*
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* @var array
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*/
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protected $qb_orderby = array();
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/**
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* QB data sets
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*
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* @var array
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*/
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protected $qb_set = array();
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/**
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* QB aliased tables list
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*
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* @var array
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*/
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protected $qb_aliased_tables = array();
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/**
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* QB WHERE group started flag
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*
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* @var bool
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*/
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protected $qb_where_group_started = FALSE;
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/**
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* QB WHERE group count
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*
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* @var int
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*/
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protected $qb_where_group_count = 0;
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// Query Builder Caching variables
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/**
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* QB Caching flag
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*
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* @var bool
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*/
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protected $qb_caching = FALSE;
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/**
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* QB Cache exists list
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*
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* @var array
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*/
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protected $qb_cache_exists = array();
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/**
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* QB Cache SELECT data
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*
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* @var array
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*/
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protected $qb_cache_select = array();
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/**
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* QB Cache FROM data
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*
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* @var array
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*/
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protected $qb_cache_from = array();
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/**
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* QB Cache JOIN data
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*
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* @var array
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*/
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protected $qb_cache_join = array();
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/**
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* QB Cache WHERE data
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*
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* @var array
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*/
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protected $qb_cache_where = array();
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/**
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* QB Cache GROUP BY data
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*
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* @var array
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*/
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protected $qb_cache_groupby = array();
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/**
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* QB Cache HAVING data
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*
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* @var array
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*/
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protected $qb_cache_having = array();
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/**
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* QB Cache ORDER BY data
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*
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* @var array
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*/
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protected $qb_cache_orderby = array();
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/**
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* QB Cache data sets
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*
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* @var array
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*/
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protected $qb_cache_set = array();
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/**
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* QB No Escape data
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*
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* @var array
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*/
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protected $qb_no_escape = array();
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/**
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* QB Cache No Escape data
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*
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* @var array
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*/
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protected $qb_cache_no_escape = array();
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// --------------------------------------------------------------------
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/**
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* Select
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*
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* Generates the SELECT portion of the query
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*
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* @param string
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* @param mixed
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* @return CI_DB_query_builder
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*/
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public function select($select = '*', $escape = NULL)
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{
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if (is_string($select))
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{
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$select = explode(',', $select);
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}
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// If the escape value was not set, we will base it on the global setting
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is_bool($escape) OR $escape = $this->_protect_identifiers;
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foreach ($select as $val)
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{
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$val = trim($val);
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if ($val !== '')
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{
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$this->qb_select[] = $val;
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$this->qb_no_escape[] = $escape;
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if ($this->qb_caching === TRUE)
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{
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$this->qb_cache_select[] = $val;
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$this->qb_cache_exists[] = 'select';
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$this->qb_cache_no_escape[] = $escape;
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}
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}
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}
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Select Max
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*
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* Generates a SELECT MAX(field) portion of a query
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*
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* @param string the field
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* @param string an alias
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* @return CI_DB_query_builder
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*/
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public function select_max($select = '', $alias = '')
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{
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return $this->_max_min_avg_sum($select, $alias, 'MAX');
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}
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// --------------------------------------------------------------------
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/**
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* Select Min
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*
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* Generates a SELECT MIN(field) portion of a query
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*
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* @param string the field
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* @param string an alias
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* @return CI_DB_query_builder
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*/
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public function select_min($select = '', $alias = '')
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{
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return $this->_max_min_avg_sum($select, $alias, 'MIN');
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}
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// --------------------------------------------------------------------
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/**
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* Select Average
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*
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* Generates a SELECT AVG(field) portion of a query
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*
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* @param string the field
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* @param string an alias
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* @return CI_DB_query_builder
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*/
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public function select_avg($select = '', $alias = '')
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{
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return $this->_max_min_avg_sum($select, $alias, 'AVG');
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}
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// --------------------------------------------------------------------
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/**
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* Select Sum
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*
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* Generates a SELECT SUM(field) portion of a query
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*
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* @param string the field
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* @param string an alias
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* @return CI_DB_query_builder
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*/
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public function select_sum($select = '', $alias = '')
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{
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return $this->_max_min_avg_sum($select, $alias, 'SUM');
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}
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// --------------------------------------------------------------------
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/**
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* SELECT [MAX|MIN|AVG|SUM]()
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*
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* @used-by select_max()
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* @used-by select_min()
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* @used-by select_avg()
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* @used-by select_sum()
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*
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* @param string $select Field name
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* @param string $alias
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* @param string $type
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* @return CI_DB_query_builder
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*/
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protected function _max_min_avg_sum($select = '', $alias = '', $type = 'MAX')
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{
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if ( ! is_string($select) OR $select === '')
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{
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$this->display_error('db_invalid_query');
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}
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$type = strtoupper($type);
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if ( ! in_array($type, array('MAX', 'MIN', 'AVG', 'SUM')))
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{
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show_error('Invalid function type: '.$type);
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}
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if ($alias === '')
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{
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$alias = $this->_create_alias_from_table(trim($select));
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}
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$sql = $type.'('.$this->protect_identifiers(trim($select)).') AS '.$this->escape_identifiers(trim($alias));
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$this->qb_select[] = $sql;
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$this->qb_no_escape[] = NULL;
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if ($this->qb_caching === TRUE)
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{
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$this->qb_cache_select[] = $sql;
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$this->qb_cache_exists[] = 'select';
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}
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Determines the alias name based on the table
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*
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* @param string $item
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* @return string
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*/
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protected function _create_alias_from_table($item)
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{
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if (strpos($item, '.') !== FALSE)
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{
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$item = explode('.', $item);
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return end($item);
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}
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return $item;
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}
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// --------------------------------------------------------------------
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/**
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* DISTINCT
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*
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* Sets a flag which tells the query string compiler to add DISTINCT
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*
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* @param bool $val
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* @return CI_DB_query_builder
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*/
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public function distinct($val = TRUE)
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{
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$this->qb_distinct = is_bool($val) ? $val : TRUE;
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* From
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*
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* Generates the FROM portion of the query
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*
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* @param mixed $from can be a string or array
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* @return CI_DB_query_builder
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*/
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public function from($from)
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{
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foreach ((array) $from as $val)
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{
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if (strpos($val, ',') !== FALSE)
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{
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foreach (explode(',', $val) as $v)
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{
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$v = trim($v);
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$this->_track_aliases($v);
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$this->qb_from[] = $v = $this->protect_identifiers($v, TRUE, NULL, FALSE);
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if ($this->qb_caching === TRUE)
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{
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$this->qb_cache_from[] = $v;
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$this->qb_cache_exists[] = 'from';
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}
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}
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}
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else
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{
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$val = trim($val);
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// Extract any aliases that might exist. We use this information
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// in the protect_identifiers to know whether to add a table prefix
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$this->_track_aliases($val);
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$this->qb_from[] = $val = $this->protect_identifiers($val, TRUE, NULL, FALSE);
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if ($this->qb_caching === TRUE)
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{
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$this->qb_cache_from[] = $val;
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$this->qb_cache_exists[] = 'from';
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}
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}
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}
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* JOIN
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*
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* Generates the JOIN portion of the query
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*
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* @param string
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* @param string the join condition
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* @param string the type of join
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* @param string whether not to try to escape identifiers
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* @return CI_DB_query_builder
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*/
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public function join($table, $cond, $type = '', $escape = NULL)
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{
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if ($type !== '')
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{
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$type = strtoupper(trim($type));
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if ( ! in_array($type, array('LEFT', 'RIGHT', 'OUTER', 'INNER', 'LEFT OUTER', 'RIGHT OUTER'), TRUE))
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{
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$type = '';
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}
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else
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{
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$type .= ' ';
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}
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}
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// Extract any aliases that might exist. We use this information
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// in the protect_identifiers to know whether to add a table prefix
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$this->_track_aliases($table);
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is_bool($escape) OR $escape = $this->_protect_identifiers;
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// Split multiple conditions
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if ($escape === TRUE && preg_match_all('/\sAND\s|\sOR\s/i', $cond, $m, PREG_OFFSET_CAPTURE))
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{
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$newcond = '';
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$m[0][] = array('', strlen($cond));
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for ($i = 0, $c = count($m[0]), $s = 0;
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$i < $c;
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$s = $m[0][$i][1] + strlen($m[0][$i][0]), $i++)
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{
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$temp = substr($cond, $s, ($m[0][$i][1] - $s));
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$newcond .= preg_match("/([\[\]\w\.'-]+)(\s*[^\"\[`'\w]+\s*)(.+)/i", $temp, $match)
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? $this->protect_identifiers($match[1]).$match[2].$this->protect_identifiers($match[3])
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: $temp;
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$newcond .= $m[0][$i][0];
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}
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$cond = ' ON '.$newcond;
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}
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// Split apart the condition and protect the identifiers
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elseif ($escape === TRUE && preg_match("/([\[\]\w\.'-]+)(\s*[^\"\[`'\w]+\s*)(.+)/i", $cond, $match))
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{
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$cond = ' ON '.$this->protect_identifiers($match[1]).$match[2].$this->protect_identifiers($match[3]);
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}
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elseif ( ! $this->_has_operator($cond))
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{
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$cond = ' USING ('.($escape ? $this->escape_identifiers($cond) : $cond).')';
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}
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else
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{
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$cond = ' ON '.$cond;
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}
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// Do we want to escape the table name?
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if ($escape === TRUE)
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{
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$table = $this->protect_identifiers($table, TRUE, NULL, FALSE);
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}
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// Assemble the JOIN statement
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$this->qb_join[] = $join = $type.'JOIN '.$table.$cond;
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if ($this->qb_caching === TRUE)
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{
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$this->qb_cache_join[] = $join;
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$this->qb_cache_exists[] = 'join';
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}
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* WHERE
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*
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* Generates the WHERE portion of the query.
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|
* Separates multiple calls with 'AND'.
|
|
*
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* @param mixed
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* @param mixed
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* @param bool
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* @return CI_DB_query_builder
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*/
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public function where($key, $value = NULL, $escape = NULL)
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{
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return $this->_wh('qb_where', $key, $value, 'AND ', $escape);
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}
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// --------------------------------------------------------------------
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/**
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|
* OR WHERE
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|
*
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|
* Generates the WHERE portion of the query.
|
|
* Separates multiple calls with 'OR'.
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|
*
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* @param mixed
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* @param mixed
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* @param bool
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* @return CI_DB_query_builder
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*/
|
|
public function or_where($key, $value = NULL, $escape = NULL)
|
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{
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return $this->_wh('qb_where', $key, $value, 'OR ', $escape);
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}
|
|
|
|
// --------------------------------------------------------------------
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|
|
|
/**
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|
* WHERE, HAVING
|
|
*
|
|
* @used-by where()
|
|
* @used-by or_where()
|
|
* @used-by having()
|
|
* @used-by or_having()
|
|
*
|
|
* @param string $qb_key 'qb_where' or 'qb_having'
|
|
* @param mixed $key
|
|
* @param mixed $value
|
|
* @param string $type
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
protected function _wh($qb_key, $key, $value = NULL, $type = 'AND ', $escape = NULL)
|
|
{
|
|
$qb_cache_key = ($qb_key === 'qb_having') ? 'qb_cache_having' : 'qb_cache_where';
|
|
|
|
if ( ! is_array($key))
|
|
{
|
|
$key = array($key => $value);
|
|
}
|
|
|
|
// If the escape value was not set will base it on the global setting
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
foreach ($key as $k => $v)
|
|
{
|
|
$prefix = (count($this->$qb_key) === 0 && count($this->$qb_cache_key) === 0)
|
|
? $this->_group_get_type('')
|
|
: $this->_group_get_type($type);
|
|
|
|
if ($v !== NULL)
|
|
{
|
|
if ($escape === TRUE)
|
|
{
|
|
$v = ' '.$this->escape($v);
|
|
}
|
|
|
|
if ( ! $this->_has_operator($k))
|
|
{
|
|
$k .= ' = ';
|
|
}
|
|
}
|
|
elseif ( ! $this->_has_operator($k))
|
|
{
|
|
// value appears not to have been set, assign the test to IS NULL
|
|
$k .= ' IS NULL';
|
|
}
|
|
elseif (preg_match('/\s*(!?=|<>|IS(?:\s+NOT)?)\s*$/i', $k, $match, PREG_OFFSET_CAPTURE))
|
|
{
|
|
$k = substr($k, 0, $match[0][1]).($match[1][0] === '=' ? ' IS NULL' : ' IS NOT NULL');
|
|
}
|
|
|
|
$this->{$qb_key}[] = array('condition' => $prefix.$k.$v, 'escape' => $escape);
|
|
if ($this->qb_caching === TRUE)
|
|
{
|
|
$this->{$qb_cache_key}[] = array('condition' => $prefix.$k.$v, 'escape' => $escape);
|
|
$this->qb_cache_exists[] = substr($qb_key, 3);
|
|
}
|
|
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* WHERE IN
|
|
*
|
|
* Generates a WHERE field IN('item', 'item') SQL query,
|
|
* joined with 'AND' if appropriate.
|
|
*
|
|
* @param string $key The field to search
|
|
* @param array $values The values searched on
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function where_in($key = NULL, $values = NULL, $escape = NULL)
|
|
{
|
|
return $this->_where_in($key, $values, FALSE, 'AND ', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* OR WHERE IN
|
|
*
|
|
* Generates a WHERE field IN('item', 'item') SQL query,
|
|
* joined with 'OR' if appropriate.
|
|
*
|
|
* @param string $key The field to search
|
|
* @param array $values The values searched on
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function or_where_in($key = NULL, $values = NULL, $escape = NULL)
|
|
{
|
|
return $this->_where_in($key, $values, FALSE, 'OR ', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* WHERE NOT IN
|
|
*
|
|
* Generates a WHERE field NOT IN('item', 'item') SQL query,
|
|
* joined with 'AND' if appropriate.
|
|
*
|
|
* @param string $key The field to search
|
|
* @param array $values The values searched on
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function where_not_in($key = NULL, $values = NULL, $escape = NULL)
|
|
{
|
|
return $this->_where_in($key, $values, TRUE, 'AND ', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* OR WHERE NOT IN
|
|
*
|
|
* Generates a WHERE field NOT IN('item', 'item') SQL query,
|
|
* joined with 'OR' if appropriate.
|
|
*
|
|
* @param string $key The field to search
|
|
* @param array $values The values searched on
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function or_where_not_in($key = NULL, $values = NULL, $escape = NULL)
|
|
{
|
|
return $this->_where_in($key, $values, TRUE, 'OR ', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Internal WHERE IN
|
|
*
|
|
* @used-by where_in()
|
|
* @used-by or_where_in()
|
|
* @used-by where_not_in()
|
|
* @used-by or_where_not_in()
|
|
*
|
|
* @param string $key The field to search
|
|
* @param array $values The values searched on
|
|
* @param bool $not If the statement would be IN or NOT IN
|
|
* @param string $type
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
protected function _where_in($key = NULL, $values = NULL, $not = FALSE, $type = 'AND ', $escape = NULL)
|
|
{
|
|
if ($key === NULL OR $values === NULL)
|
|
{
|
|
return $this;
|
|
}
|
|
|
|
if ( ! is_array($values))
|
|
{
|
|
$values = array($values);
|
|
}
|
|
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
$not = ($not) ? ' NOT' : '';
|
|
|
|
$where_in = array();
|
|
foreach ($values as $value)
|
|
{
|
|
$where_in[] = $this->escape($value);
|
|
}
|
|
|
|
$prefix = (count($this->qb_where) === 0) ? $this->_group_get_type('') : $this->_group_get_type($type);
|
|
$where_in = array(
|
|
'condition' => $prefix.$key.$not.' IN('.implode(', ', $where_in).')',
|
|
'escape' => $escape
|
|
);
|
|
|
|
$this->qb_where[] = $where_in;
|
|
if ($this->qb_caching === TRUE)
|
|
{
|
|
$this->qb_cache_where[] = $where_in;
|
|
$this->qb_cache_exists[] = 'where';
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* LIKE
|
|
*
|
|
* Generates a %LIKE% portion of the query.
|
|
* Separates multiple calls with 'AND'.
|
|
*
|
|
* @param mixed $field
|
|
* @param string $match
|
|
* @param string $side
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function like($field, $match = '', $side = 'both', $escape = NULL)
|
|
{
|
|
return $this->_like($field, $match, 'AND ', $side, '', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* NOT LIKE
|
|
*
|
|
* Generates a NOT LIKE portion of the query.
|
|
* Separates multiple calls with 'AND'.
|
|
*
|
|
* @param mixed $field
|
|
* @param string $match
|
|
* @param string $side
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function not_like($field, $match = '', $side = 'both', $escape = NULL)
|
|
{
|
|
return $this->_like($field, $match, 'AND ', $side, 'NOT', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* OR LIKE
|
|
*
|
|
* Generates a %LIKE% portion of the query.
|
|
* Separates multiple calls with 'OR'.
|
|
*
|
|
* @param mixed $field
|
|
* @param string $match
|
|
* @param string $side
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function or_like($field, $match = '', $side = 'both', $escape = NULL)
|
|
{
|
|
return $this->_like($field, $match, 'OR ', $side, '', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* OR NOT LIKE
|
|
*
|
|
* Generates a NOT LIKE portion of the query.
|
|
* Separates multiple calls with 'OR'.
|
|
*
|
|
* @param mixed $field
|
|
* @param string $match
|
|
* @param string $side
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function or_not_like($field, $match = '', $side = 'both', $escape = NULL)
|
|
{
|
|
return $this->_like($field, $match, 'OR ', $side, 'NOT', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Internal LIKE
|
|
*
|
|
* @used-by like()
|
|
* @used-by or_like()
|
|
* @used-by not_like()
|
|
* @used-by or_not_like()
|
|
*
|
|
* @param mixed $field
|
|
* @param string $match
|
|
* @param string $type
|
|
* @param string $side
|
|
* @param string $not
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
protected function _like($field, $match = '', $type = 'AND ', $side = 'both', $not = '', $escape = NULL)
|
|
{
|
|
if ( ! is_array($field))
|
|
{
|
|
$field = array($field => $match);
|
|
}
|
|
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
foreach ($field as $k => $v)
|
|
{
|
|
$prefix = (count($this->qb_where) === 0 && count($this->qb_cache_where) === 0)
|
|
? $this->_group_get_type('') : $this->_group_get_type($type);
|
|
|
|
$v = $this->escape_like_str($v);
|
|
|
|
if ($side === 'none')
|
|
{
|
|
$like_statement = "{$prefix} {$k} {$not} LIKE '{$v}'";
|
|
}
|
|
elseif ($side === 'before')
|
|
{
|
|
$like_statement = "{$prefix} {$k} {$not} LIKE '%{$v}'";
|
|
}
|
|
elseif ($side === 'after')
|
|
{
|
|
$like_statement = "{$prefix} {$k} {$not} LIKE '{$v}%'";
|
|
}
|
|
else
|
|
{
|
|
$like_statement = "{$prefix} {$k} {$not} LIKE '%{$v}%'";
|
|
}
|
|
|
|
// some platforms require an escape sequence definition for LIKE wildcards
|
|
if ($this->_like_escape_str !== '')
|
|
{
|
|
$like_statement .= sprintf($this->_like_escape_str, $this->_like_escape_chr);
|
|
}
|
|
|
|
$this->qb_where[] = array('condition' => $like_statement, 'escape' => $escape);
|
|
if ($this->qb_caching === TRUE)
|
|
{
|
|
$this->qb_cache_where[] = array('condition' => $like_statement, 'escape' => $escape);
|
|
$this->qb_cache_exists[] = 'where';
|
|
}
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Starts a query group.
|
|
*
|
|
* @param string $not (Internal use only)
|
|
* @param string $type (Internal use only)
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function group_start($not = '', $type = 'AND ')
|
|
{
|
|
$type = $this->_group_get_type($type);
|
|
|
|
$this->qb_where_group_started = TRUE;
|
|
$prefix = (count($this->qb_where) === 0 && count($this->qb_cache_where) === 0) ? '' : $type;
|
|
$where = array(
|
|
'condition' => $prefix.$not.str_repeat(' ', ++$this->qb_where_group_count).' (',
|
|
'escape' => FALSE
|
|
);
|
|
|
|
$this->qb_where[] = $where;
|
|
if ($this->qb_caching)
|
|
{
|
|
$this->qb_cache_where[] = $where;
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Starts a query group, but ORs the group
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function or_group_start()
|
|
{
|
|
return $this->group_start('', 'OR ');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Starts a query group, but NOTs the group
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function not_group_start()
|
|
{
|
|
return $this->group_start('NOT ', 'AND ');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Starts a query group, but OR NOTs the group
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function or_not_group_start()
|
|
{
|
|
return $this->group_start('NOT ', 'OR ');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Ends a query group
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function group_end()
|
|
{
|
|
$this->qb_where_group_started = FALSE;
|
|
$where = array(
|
|
'condition' => str_repeat(' ', $this->qb_where_group_count--).')',
|
|
'escape' => FALSE
|
|
);
|
|
|
|
$this->qb_where[] = $where;
|
|
if ($this->qb_caching)
|
|
{
|
|
$this->qb_cache_where[] = $where;
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Group_get_type
|
|
*
|
|
* @used-by group_start()
|
|
* @used-by _like()
|
|
* @used-by _wh()
|
|
* @used-by _where_in()
|
|
*
|
|
* @param string $type
|
|
* @return string
|
|
*/
|
|
protected function _group_get_type($type)
|
|
{
|
|
if ($this->qb_where_group_started)
|
|
{
|
|
$type = '';
|
|
$this->qb_where_group_started = FALSE;
|
|
}
|
|
|
|
return $type;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* GROUP BY
|
|
*
|
|
* @param string $by
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function group_by($by, $escape = NULL)
|
|
{
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
if (is_string($by))
|
|
{
|
|
$by = ($escape === TRUE)
|
|
? explode(',', $by)
|
|
: array($by);
|
|
}
|
|
|
|
foreach ($by as $val)
|
|
{
|
|
$val = trim($val);
|
|
|
|
if ($val !== '')
|
|
{
|
|
$val = array('field' => $val, 'escape' => $escape);
|
|
|
|
$this->qb_groupby[] = $val;
|
|
if ($this->qb_caching === TRUE)
|
|
{
|
|
$this->qb_cache_groupby[] = $val;
|
|
$this->qb_cache_exists[] = 'groupby';
|
|
}
|
|
}
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* HAVING
|
|
*
|
|
* Separates multiple calls with 'AND'.
|
|
*
|
|
* @param string $key
|
|
* @param string $value
|
|
* @param bool $escape
|
|
* @return object
|
|
*/
|
|
public function having($key, $value = NULL, $escape = NULL)
|
|
{
|
|
return $this->_wh('qb_having', $key, $value, 'AND ', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* OR HAVING
|
|
*
|
|
* Separates multiple calls with 'OR'.
|
|
*
|
|
* @param string $key
|
|
* @param string $value
|
|
* @param bool $escape
|
|
* @return object
|
|
*/
|
|
public function or_having($key, $value = NULL, $escape = NULL)
|
|
{
|
|
return $this->_wh('qb_having', $key, $value, 'OR ', $escape);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* ORDER BY
|
|
*
|
|
* @param string $orderby
|
|
* @param string $direction ASC, DESC or RANDOM
|
|
* @param bool $escape
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function order_by($orderby, $direction = '', $escape = NULL)
|
|
{
|
|
$direction = strtoupper(trim($direction));
|
|
|
|
if ($direction === 'RANDOM')
|
|
{
|
|
$direction = '';
|
|
|
|
// Do we have a seed value?
|
|
$orderby = ctype_digit((string) $orderby)
|
|
? sprintf($this->_random_keyword[1], $orderby)
|
|
: $this->_random_keyword[0];
|
|
}
|
|
elseif (empty($orderby))
|
|
{
|
|
return $this;
|
|
}
|
|
elseif ($direction !== '')
|
|
{
|
|
$direction = in_array($direction, array('ASC', 'DESC'), TRUE) ? ' '.$direction : '';
|
|
}
|
|
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
if ($escape === FALSE)
|
|
{
|
|
$qb_orderby[] = array('field' => $orderby, 'direction' => $direction, 'escape' => FALSE);
|
|
}
|
|
else
|
|
{
|
|
$qb_orderby = array();
|
|
foreach (explode(',', $orderby) as $field)
|
|
{
|
|
$qb_orderby[] = ($direction === '' && preg_match('/\s+(ASC|DESC)$/i', rtrim($field), $match, PREG_OFFSET_CAPTURE))
|
|
? array('field' => ltrim(substr($field, 0, $match[0][1])), 'direction' => ' '.$match[1][0], 'escape' => TRUE)
|
|
: array('field' => trim($field), 'direction' => $direction, 'escape' => TRUE);
|
|
}
|
|
}
|
|
|
|
$this->qb_orderby = array_merge($this->qb_orderby, $qb_orderby);
|
|
if ($this->qb_caching === TRUE)
|
|
{
|
|
$this->qb_cache_orderby = array_merge($this->qb_cache_orderby, $qb_orderby);
|
|
$this->qb_cache_exists[] = 'orderby';
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* LIMIT
|
|
*
|
|
* @param int $value LIMIT value
|
|
* @param int $offset OFFSET value
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function limit($value, $offset = 0)
|
|
{
|
|
is_null($value) OR $this->qb_limit = (int) $value;
|
|
empty($offset) OR $this->qb_offset = (int) $offset;
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Sets the OFFSET value
|
|
*
|
|
* @param int $offset OFFSET value
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function offset($offset)
|
|
{
|
|
empty($offset) OR $this->qb_offset = (int) $offset;
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* LIMIT string
|
|
*
|
|
* Generates a platform-specific LIMIT clause.
|
|
*
|
|
* @param string $sql SQL Query
|
|
* @return string
|
|
*/
|
|
protected function _limit($sql)
|
|
{
|
|
return $sql.' LIMIT '.($this->qb_offset ? $this->qb_offset.', ' : '').$this->qb_limit;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* The "set" function.
|
|
*
|
|
* Allows key/value pairs to be set for inserting or updating
|
|
*
|
|
* @param mixed
|
|
* @param string
|
|
* @param bool
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function set($key, $value = '', $escape = NULL)
|
|
{
|
|
$key = $this->_object_to_array($key);
|
|
|
|
if ( ! is_array($key))
|
|
{
|
|
$key = array($key => $value);
|
|
}
|
|
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
foreach ($key as $k => $v)
|
|
{
|
|
$this->qb_set[$this->protect_identifiers($k, FALSE, $escape)] = ($escape)
|
|
? $this->escape($v) : $v;
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get SELECT query string
|
|
*
|
|
* Compiles a SELECT query string and returns the sql.
|
|
*
|
|
* @param string the table name to select from (optional)
|
|
* @param bool TRUE: resets QB values; FALSE: leave QB vaules alone
|
|
* @return string
|
|
*/
|
|
public function get_compiled_select($table = '', $reset = TRUE)
|
|
{
|
|
if ($table !== '')
|
|
{
|
|
$this->_track_aliases($table);
|
|
$this->from($table);
|
|
}
|
|
|
|
$select = $this->_compile_select();
|
|
|
|
if ($reset === TRUE)
|
|
{
|
|
$this->_reset_select();
|
|
}
|
|
|
|
return $select;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get
|
|
*
|
|
* Compiles the select statement based on the other functions called
|
|
* and runs the query
|
|
*
|
|
* @param string the table
|
|
* @param string the limit clause
|
|
* @param string the offset clause
|
|
* @return object
|
|
*/
|
|
public function get($table = '', $limit = NULL, $offset = NULL)
|
|
{
|
|
if ($table !== '')
|
|
{
|
|
$this->_track_aliases($table);
|
|
$this->from($table);
|
|
}
|
|
|
|
if ( ! empty($limit))
|
|
{
|
|
$this->limit($limit, $offset);
|
|
}
|
|
|
|
$result = $this->query($this->_compile_select());
|
|
$this->_reset_select();
|
|
return $result;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* "Count All Results" query
|
|
*
|
|
* Generates a platform-specific query string that counts all records
|
|
* returned by an Query Builder query.
|
|
*
|
|
* @param string
|
|
* @param bool the reset clause
|
|
* @return int
|
|
*/
|
|
public function count_all_results($table = '', $reset = TRUE)
|
|
{
|
|
if ($table !== '')
|
|
{
|
|
$this->_track_aliases($table);
|
|
$this->from($table);
|
|
}
|
|
|
|
$result = ($this->qb_distinct === TRUE)
|
|
? $this->query($this->_count_string.$this->protect_identifiers('numrows')."\nFROM (\n".$this->_compile_select()."\n) CI_count_all_results")
|
|
: $this->query($this->_compile_select($this->_count_string.$this->protect_identifiers('numrows')));
|
|
|
|
if ($reset === TRUE)
|
|
{
|
|
$this->_reset_select();
|
|
}
|
|
|
|
if ($result->num_rows() === 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
$row = $result->row();
|
|
return (int) $row->numrows;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get_Where
|
|
*
|
|
* Allows the where clause, limit and offset to be added directly
|
|
*
|
|
* @param string $table
|
|
* @param string $where
|
|
* @param int $limit
|
|
* @param int $offset
|
|
* @return object
|
|
*/
|
|
public function get_where($table = '', $where = NULL, $limit = NULL, $offset = NULL)
|
|
{
|
|
if ($table !== '')
|
|
{
|
|
$this->from($table);
|
|
}
|
|
|
|
if ($where !== NULL)
|
|
{
|
|
$this->where($where);
|
|
}
|
|
|
|
if ( ! empty($limit))
|
|
{
|
|
$this->limit($limit, $offset);
|
|
}
|
|
|
|
$result = $this->query($this->_compile_select());
|
|
$this->_reset_select();
|
|
return $result;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert_Batch
|
|
*
|
|
* Compiles batch insert strings and runs the queries
|
|
*
|
|
* @param string $table Table to insert into
|
|
* @param array $set An associative array of insert values
|
|
* @param bool $escape Whether to escape values and identifiers
|
|
* @return int Number of rows inserted or FALSE on failure
|
|
*/
|
|
public function insert_batch($table = '', $set = NULL, $escape = NULL)
|
|
{
|
|
if ($set !== NULL)
|
|
{
|
|
$this->set_insert_batch($set, '', $escape);
|
|
}
|
|
|
|
if (count($this->qb_set) === 0)
|
|
{
|
|
// No valid data array. Folds in cases where keys and values did not match up
|
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
|
|
}
|
|
|
|
if ($table === '')
|
|
{
|
|
if ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
$table = $this->qb_from[0];
|
|
}
|
|
|
|
// Batch this baby
|
|
$affected_rows = 0;
|
|
for ($i = 0, $total = count($this->qb_set); $i < $total; $i += 100)
|
|
{
|
|
$this->query($this->_insert_batch($this->protect_identifiers($table, TRUE, $escape, FALSE), $this->qb_keys, array_slice($this->qb_set, $i, 100)));
|
|
$affected_rows += $this->affected_rows();
|
|
}
|
|
|
|
$this->_reset_write();
|
|
return $affected_rows;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert batch statement
|
|
*
|
|
* Generates a platform-specific insert string from the supplied data.
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $keys INSERT keys
|
|
* @param array $values INSERT values
|
|
* @return string
|
|
*/
|
|
protected function _insert_batch($table, $keys, $values)
|
|
{
|
|
return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES '.implode(', ', $values);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* The "set_insert_batch" function. Allows key/value pairs to be set for batch inserts
|
|
*
|
|
* @param mixed
|
|
* @param string
|
|
* @param bool
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function set_insert_batch($key, $value = '', $escape = NULL)
|
|
{
|
|
$key = $this->_object_to_array_batch($key);
|
|
|
|
if ( ! is_array($key))
|
|
{
|
|
$key = array($key => $value);
|
|
}
|
|
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
$keys = array_keys($this->_object_to_array(current($key)));
|
|
sort($keys);
|
|
|
|
foreach ($key as $row)
|
|
{
|
|
$row = $this->_object_to_array($row);
|
|
if (count(array_diff($keys, array_keys($row))) > 0 OR count(array_diff(array_keys($row), $keys)) > 0)
|
|
{
|
|
// batch function above returns an error on an empty array
|
|
$this->qb_set[] = array();
|
|
return;
|
|
}
|
|
|
|
ksort($row); // puts $row in the same order as our keys
|
|
|
|
if ($escape !== FALSE)
|
|
{
|
|
$clean = array();
|
|
foreach ($row as $value)
|
|
{
|
|
$clean[] = $this->escape($value);
|
|
}
|
|
|
|
$row = $clean;
|
|
}
|
|
|
|
$this->qb_set[] = '('.implode(',', $row).')';
|
|
}
|
|
|
|
foreach ($keys as $k)
|
|
{
|
|
$this->qb_keys[] = $this->protect_identifiers($k, FALSE, $escape);
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get INSERT query string
|
|
*
|
|
* Compiles an insert query and returns the sql
|
|
*
|
|
* @param string the table to insert into
|
|
* @param bool TRUE: reset QB values; FALSE: leave QB values alone
|
|
* @return string
|
|
*/
|
|
public function get_compiled_insert($table = '', $reset = TRUE)
|
|
{
|
|
if ($this->_validate_insert($table) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$sql = $this->_insert(
|
|
$this->protect_identifiers(
|
|
$this->qb_from[0], TRUE, NULL, FALSE
|
|
),
|
|
array_keys($this->qb_set),
|
|
array_values($this->qb_set)
|
|
);
|
|
|
|
if ($reset === TRUE)
|
|
{
|
|
$this->_reset_write();
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert
|
|
*
|
|
* Compiles an insert string and runs the query
|
|
*
|
|
* @param string the table to insert data into
|
|
* @param array an associative array of insert values
|
|
* @param bool $escape Whether to escape values and identifiers
|
|
* @return object
|
|
*/
|
|
public function insert($table = '', $set = NULL, $escape = NULL)
|
|
{
|
|
if ($set !== NULL)
|
|
{
|
|
$this->set($set, '', $escape);
|
|
}
|
|
|
|
if ($this->_validate_insert($table) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$sql = $this->_insert(
|
|
$this->protect_identifiers(
|
|
$this->qb_from[0], TRUE, $escape, FALSE
|
|
),
|
|
array_keys($this->qb_set),
|
|
array_values($this->qb_set)
|
|
);
|
|
|
|
$this->_reset_write();
|
|
return $this->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Validate Insert
|
|
*
|
|
* This method is used by both insert() and get_compiled_insert() to
|
|
* validate that the there data is actually being set and that table
|
|
* has been chosen to be inserted into.
|
|
*
|
|
* @param string the table to insert data into
|
|
* @return string
|
|
*/
|
|
protected function _validate_insert($table = '')
|
|
{
|
|
if (count($this->qb_set) === 0)
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
|
|
}
|
|
|
|
if ($table !== '')
|
|
{
|
|
$this->qb_from[0] = $table;
|
|
}
|
|
elseif ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Replace
|
|
*
|
|
* Compiles an replace into string and runs the query
|
|
*
|
|
* @param string the table to replace data into
|
|
* @param array an associative array of insert values
|
|
* @return object
|
|
*/
|
|
public function replace($table = '', $set = NULL)
|
|
{
|
|
if ($set !== NULL)
|
|
{
|
|
$this->set($set);
|
|
}
|
|
|
|
if (count($this->qb_set) === 0)
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
|
|
}
|
|
|
|
if ($table === '')
|
|
{
|
|
if ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
$table = $this->qb_from[0];
|
|
}
|
|
|
|
$sql = $this->_replace($this->protect_identifiers($table, TRUE, NULL, FALSE), array_keys($this->qb_set), array_values($this->qb_set));
|
|
|
|
$this->_reset_write();
|
|
return $this->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Replace statement
|
|
*
|
|
* Generates a platform-specific replace string from the supplied data
|
|
*
|
|
* @param string the table name
|
|
* @param array the insert keys
|
|
* @param array the insert values
|
|
* @return string
|
|
*/
|
|
protected function _replace($table, $keys, $values)
|
|
{
|
|
return 'REPLACE INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* FROM tables
|
|
*
|
|
* Groups tables in FROM clauses if needed, so there is no confusion
|
|
* about operator precedence.
|
|
*
|
|
* Note: This is only used (and overridden) by MySQL and CUBRID.
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function _from_tables()
|
|
{
|
|
return implode(', ', $this->qb_from);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get UPDATE query string
|
|
*
|
|
* Compiles an update query and returns the sql
|
|
*
|
|
* @param string the table to update
|
|
* @param bool TRUE: reset QB values; FALSE: leave QB values alone
|
|
* @return string
|
|
*/
|
|
public function get_compiled_update($table = '', $reset = TRUE)
|
|
{
|
|
// Combine any cached components with the current statements
|
|
$this->_merge_cache();
|
|
|
|
if ($this->_validate_update($table) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$sql = $this->_update($this->protect_identifiers($this->qb_from[0], TRUE, NULL, FALSE), $this->qb_set);
|
|
|
|
if ($reset === TRUE)
|
|
{
|
|
$this->_reset_write();
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* UPDATE
|
|
*
|
|
* Compiles an update string and runs the query.
|
|
*
|
|
* @param string $table
|
|
* @param array $set An associative array of update values
|
|
* @param mixed $where
|
|
* @param int $limit
|
|
* @return object
|
|
*/
|
|
public function update($table = '', $set = NULL, $where = NULL, $limit = NULL)
|
|
{
|
|
// Combine any cached components with the current statements
|
|
$this->_merge_cache();
|
|
|
|
if ($set !== NULL)
|
|
{
|
|
$this->set($set);
|
|
}
|
|
|
|
if ($this->_validate_update($table) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
if ($where !== NULL)
|
|
{
|
|
$this->where($where);
|
|
}
|
|
|
|
if ( ! empty($limit))
|
|
{
|
|
$this->limit($limit);
|
|
}
|
|
|
|
$sql = $this->_update($this->protect_identifiers($this->qb_from[0], TRUE, NULL, FALSE), $this->qb_set);
|
|
$this->_reset_write();
|
|
return $this->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Validate Update
|
|
*
|
|
* This method is used by both update() and get_compiled_update() to
|
|
* validate that data is actually being set and that a table has been
|
|
* chosen to be update.
|
|
*
|
|
* @param string the table to update data on
|
|
* @return bool
|
|
*/
|
|
protected function _validate_update($table = '')
|
|
{
|
|
if (count($this->qb_set) === 0)
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
|
|
}
|
|
|
|
if ($table !== '')
|
|
{
|
|
$this->qb_from[0] = $table;
|
|
}
|
|
elseif ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Update_Batch
|
|
*
|
|
* Compiles an update string and runs the query
|
|
*
|
|
* @param string the table to retrieve the results from
|
|
* @param array an associative array of update values
|
|
* @param string the where key
|
|
* @return int number of rows affected or FALSE on failure
|
|
*/
|
|
public function update_batch($table = '', $set = NULL, $index = NULL)
|
|
{
|
|
// Combine any cached components with the current statements
|
|
$this->_merge_cache();
|
|
|
|
if ($index === NULL)
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_use_index') : FALSE;
|
|
}
|
|
|
|
if ($set !== NULL)
|
|
{
|
|
$this->set_update_batch($set, $index);
|
|
}
|
|
|
|
if (count($this->qb_set) === 0)
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
|
|
}
|
|
|
|
if ($table === '')
|
|
{
|
|
if ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
$table = $this->qb_from[0];
|
|
}
|
|
|
|
// Batch this baby
|
|
$affected_rows = 0;
|
|
for ($i = 0, $total = count($this->qb_set); $i < $total; $i += 100)
|
|
{
|
|
$this->query($this->_update_batch($this->protect_identifiers($table, TRUE, NULL, FALSE), array_slice($this->qb_set, $i, 100), $this->protect_identifiers($index)));
|
|
$affected_rows += $this->affected_rows();
|
|
$this->qb_where = array();
|
|
}
|
|
|
|
$this->_reset_write();
|
|
return $affected_rows;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Update_Batch statement
|
|
*
|
|
* Generates a platform-specific batch update string from the supplied data
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $values Update data
|
|
* @param string $index WHERE key
|
|
* @return string
|
|
*/
|
|
protected function _update_batch($table, $values, $index)
|
|
{
|
|
$ids = array();
|
|
foreach ($values as $key => $val)
|
|
{
|
|
$ids[] = $val[$index];
|
|
|
|
foreach (array_keys($val) as $field)
|
|
{
|
|
if ($field !== $index)
|
|
{
|
|
$final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
|
|
}
|
|
}
|
|
}
|
|
|
|
$cases = '';
|
|
foreach ($final as $k => $v)
|
|
{
|
|
$cases .= $k." = CASE \n"
|
|
.implode("\n", $v)."\n"
|
|
.'ELSE '.$k.' END, ';
|
|
}
|
|
|
|
$this->where($index.' IN('.implode(',', $ids).')', NULL, FALSE);
|
|
|
|
return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* The "set_update_batch" function. Allows key/value pairs to be set for batch updating
|
|
*
|
|
* @param array
|
|
* @param string
|
|
* @param bool
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function set_update_batch($key, $index = '', $escape = NULL)
|
|
{
|
|
$key = $this->_object_to_array_batch($key);
|
|
|
|
if ( ! is_array($key))
|
|
{
|
|
// @todo error
|
|
}
|
|
|
|
is_bool($escape) OR $escape = $this->_protect_identifiers;
|
|
|
|
foreach ($key as $k => $v)
|
|
{
|
|
$index_set = FALSE;
|
|
$clean = array();
|
|
foreach ($v as $k2 => $v2)
|
|
{
|
|
if ($k2 === $index)
|
|
{
|
|
$index_set = TRUE;
|
|
}
|
|
|
|
$clean[$this->protect_identifiers($k2, FALSE, $escape)] = ($escape === FALSE) ? $v2 : $this->escape($v2);
|
|
}
|
|
|
|
if ($index_set === FALSE)
|
|
{
|
|
return $this->display_error('db_batch_missing_index');
|
|
}
|
|
|
|
$this->qb_set[] = $clean;
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Empty Table
|
|
*
|
|
* Compiles a delete string and runs "DELETE FROM table"
|
|
*
|
|
* @param string the table to empty
|
|
* @return object
|
|
*/
|
|
public function empty_table($table = '')
|
|
{
|
|
if ($table === '')
|
|
{
|
|
if ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
$table = $this->qb_from[0];
|
|
}
|
|
else
|
|
{
|
|
$table = $this->protect_identifiers($table, TRUE, NULL, FALSE);
|
|
}
|
|
|
|
$sql = $this->_delete($table);
|
|
$this->_reset_write();
|
|
return $this->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Truncate
|
|
*
|
|
* Compiles a truncate string and runs the query
|
|
* If the database does not support the truncate() command
|
|
* This function maps to "DELETE FROM table"
|
|
*
|
|
* @param string the table to truncate
|
|
* @return object
|
|
*/
|
|
public function truncate($table = '')
|
|
{
|
|
if ($table === '')
|
|
{
|
|
if ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
$table = $this->qb_from[0];
|
|
}
|
|
else
|
|
{
|
|
$table = $this->protect_identifiers($table, TRUE, NULL, FALSE);
|
|
}
|
|
|
|
$sql = $this->_truncate($table);
|
|
$this->_reset_write();
|
|
return $this->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Truncate statement
|
|
*
|
|
* Generates a platform-specific truncate string from the supplied data
|
|
*
|
|
* If the database does not support the truncate() command,
|
|
* then this method maps to 'DELETE FROM table'
|
|
*
|
|
* @param string the table name
|
|
* @return string
|
|
*/
|
|
protected function _truncate($table)
|
|
{
|
|
return 'TRUNCATE '.$table;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get DELETE query string
|
|
*
|
|
* Compiles a delete query string and returns the sql
|
|
*
|
|
* @param string the table to delete from
|
|
* @param bool TRUE: reset QB values; FALSE: leave QB values alone
|
|
* @return string
|
|
*/
|
|
public function get_compiled_delete($table = '', $reset = TRUE)
|
|
{
|
|
$this->return_delete_sql = TRUE;
|
|
$sql = $this->delete($table, '', NULL, $reset);
|
|
$this->return_delete_sql = FALSE;
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Delete
|
|
*
|
|
* Compiles a delete string and runs the query
|
|
*
|
|
* @param mixed the table(s) to delete from. String or array
|
|
* @param mixed the where clause
|
|
* @param mixed the limit clause
|
|
* @param bool
|
|
* @return mixed
|
|
*/
|
|
public function delete($table = '', $where = '', $limit = NULL, $reset_data = TRUE)
|
|
{
|
|
// Combine any cached components with the current statements
|
|
$this->_merge_cache();
|
|
|
|
if ($table === '')
|
|
{
|
|
if ( ! isset($this->qb_from[0]))
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
|
|
}
|
|
|
|
$table = $this->qb_from[0];
|
|
}
|
|
elseif (is_array($table))
|
|
{
|
|
foreach ($table as $single_table)
|
|
{
|
|
$this->delete($single_table, $where, $limit, $reset_data);
|
|
}
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
$table = $this->protect_identifiers($table, TRUE, NULL, FALSE);
|
|
}
|
|
|
|
if ($where !== '')
|
|
{
|
|
$this->where($where);
|
|
}
|
|
|
|
if ( ! empty($limit))
|
|
{
|
|
$this->limit($limit);
|
|
}
|
|
|
|
if (count($this->qb_where) === 0)
|
|
{
|
|
return ($this->db_debug) ? $this->display_error('db_del_must_use_where') : FALSE;
|
|
}
|
|
|
|
$sql = $this->_delete($table);
|
|
if ($reset_data)
|
|
{
|
|
$this->_reset_write();
|
|
}
|
|
|
|
return ($this->return_delete_sql === TRUE) ? $sql : $this->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Delete statement
|
|
*
|
|
* Generates a platform-specific delete string from the supplied data
|
|
*
|
|
* @param string the table name
|
|
* @return string
|
|
*/
|
|
protected function _delete($table)
|
|
{
|
|
return 'DELETE FROM '.$table.$this->_compile_wh('qb_where')
|
|
.($this->qb_limit ? ' LIMIT '.$this->qb_limit : '');
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* DB Prefix
|
|
*
|
|
* Prepends a database prefix if one exists in configuration
|
|
*
|
|
* @param string the table
|
|
* @return string
|
|
*/
|
|
public function dbprefix($table = '')
|
|
{
|
|
if ($table === '')
|
|
{
|
|
$this->display_error('db_table_name_required');
|
|
}
|
|
|
|
return $this->dbprefix.$table;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set DB Prefix
|
|
*
|
|
* Set's the DB Prefix to something new without needing to reconnect
|
|
*
|
|
* @param string the prefix
|
|
* @return string
|
|
*/
|
|
public function set_dbprefix($prefix = '')
|
|
{
|
|
return $this->dbprefix = $prefix;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Track Aliases
|
|
*
|
|
* Used to track SQL statements written with aliased tables.
|
|
*
|
|
* @param string The table to inspect
|
|
* @return string
|
|
*/
|
|
protected function _track_aliases($table)
|
|
{
|
|
if (is_array($table))
|
|
{
|
|
foreach ($table as $t)
|
|
{
|
|
$this->_track_aliases($t);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Does the string contain a comma? If so, we need to separate
|
|
// the string into discreet statements
|
|
if (strpos($table, ',') !== FALSE)
|
|
{
|
|
return $this->_track_aliases(explode(',', $table));
|
|
}
|
|
|
|
// if a table alias is used we can recognize it by a space
|
|
if (strpos($table, ' ') !== FALSE)
|
|
{
|
|
// if the alias is written with the AS keyword, remove it
|
|
$table = preg_replace('/\s+AS\s+/i', ' ', $table);
|
|
|
|
// Grab the alias
|
|
$table = trim(strrchr($table, ' '));
|
|
|
|
// Store the alias, if it doesn't already exist
|
|
if ( ! in_array($table, $this->qb_aliased_tables))
|
|
{
|
|
$this->qb_aliased_tables[] = $table;
|
|
}
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Compile the SELECT statement
|
|
*
|
|
* Generates a query string based on which functions were used.
|
|
* Should not be called directly.
|
|
*
|
|
* @param bool $select_override
|
|
* @return string
|
|
*/
|
|
protected function _compile_select($select_override = FALSE)
|
|
{
|
|
// Combine any cached components with the current statements
|
|
$this->_merge_cache();
|
|
|
|
// Write the "select" portion of the query
|
|
if ($select_override !== FALSE)
|
|
{
|
|
$sql = $select_override;
|
|
}
|
|
else
|
|
{
|
|
$sql = ( ! $this->qb_distinct) ? 'SELECT ' : 'SELECT DISTINCT ';
|
|
|
|
if (count($this->qb_select) === 0)
|
|
{
|
|
$sql .= '*';
|
|
}
|
|
else
|
|
{
|
|
// Cycle through the "select" portion of the query and prep each column name.
|
|
// The reason we protect identifiers here rather then in the select() function
|
|
// is because until the user calls the from() function we don't know if there are aliases
|
|
foreach ($this->qb_select as $key => $val)
|
|
{
|
|
$no_escape = isset($this->qb_no_escape[$key]) ? $this->qb_no_escape[$key] : NULL;
|
|
$this->qb_select[$key] = $this->protect_identifiers($val, FALSE, $no_escape);
|
|
}
|
|
|
|
$sql .= implode(', ', $this->qb_select);
|
|
}
|
|
}
|
|
|
|
// Write the "FROM" portion of the query
|
|
if (count($this->qb_from) > 0)
|
|
{
|
|
$sql .= "\nFROM ".$this->_from_tables();
|
|
}
|
|
|
|
// Write the "JOIN" portion of the query
|
|
if (count($this->qb_join) > 0)
|
|
{
|
|
$sql .= "\n".implode("\n", $this->qb_join);
|
|
}
|
|
|
|
$sql .= $this->_compile_wh('qb_where')
|
|
.$this->_compile_group_by()
|
|
.$this->_compile_wh('qb_having')
|
|
.$this->_compile_order_by(); // ORDER BY
|
|
|
|
// LIMIT
|
|
if ($this->qb_limit)
|
|
{
|
|
return $this->_limit($sql."\n");
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Compile WHERE, HAVING statements
|
|
*
|
|
* Escapes identifiers in WHERE and HAVING statements at execution time.
|
|
*
|
|
* Required so that aliases are tracked properly, regardless of wether
|
|
* where(), or_where(), having(), or_having are called prior to from(),
|
|
* join() and dbprefix is added only if needed.
|
|
*
|
|
* @param string $qb_key 'qb_where' or 'qb_having'
|
|
* @return string SQL statement
|
|
*/
|
|
protected function _compile_wh($qb_key)
|
|
{
|
|
if (count($this->$qb_key) > 0)
|
|
{
|
|
for ($i = 0, $c = count($this->$qb_key); $i < $c; $i++)
|
|
{
|
|
// Is this condition already compiled?
|
|
if (is_string($this->{$qb_key}[$i]))
|
|
{
|
|
continue;
|
|
}
|
|
elseif ($this->{$qb_key}[$i]['escape'] === FALSE)
|
|
{
|
|
$this->{$qb_key}[$i] = $this->{$qb_key}[$i]['condition'];
|
|
continue;
|
|
}
|
|
|
|
// Split multiple conditions
|
|
$conditions = preg_split(
|
|
'/(\s*AND\s+|\s*OR\s+)/i',
|
|
$this->{$qb_key}[$i]['condition'],
|
|
-1,
|
|
PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY
|
|
);
|
|
|
|
for ($ci = 0, $cc = count($conditions); $ci < $cc; $ci++)
|
|
{
|
|
if (($op = $this->_get_operator($conditions[$ci])) === FALSE
|
|
OR ! preg_match('/^(\(?)(.*)('.preg_quote($op, '/').')\s*(.*(?<!\)))?(\)?)$/i', $conditions[$ci], $matches))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// $matches = array(
|
|
// 0 => '(test <= foo)', /* the whole thing */
|
|
// 1 => '(', /* optional */
|
|
// 2 => 'test', /* the field name */
|
|
// 3 => ' <= ', /* $op */
|
|
// 4 => 'foo', /* optional, if $op is e.g. 'IS NULL' */
|
|
// 5 => ')' /* optional */
|
|
// );
|
|
|
|
if ( ! empty($matches[4]))
|
|
{
|
|
$this->_is_literal($matches[4]) OR $matches[4] = $this->protect_identifiers(trim($matches[4]));
|
|
$matches[4] = ' '.$matches[4];
|
|
}
|
|
|
|
$conditions[$ci] = $matches[1].$this->protect_identifiers(trim($matches[2]))
|
|
.' '.trim($matches[3]).$matches[4].$matches[5];
|
|
}
|
|
|
|
$this->{$qb_key}[$i] = implode('', $conditions);
|
|
}
|
|
|
|
return ($qb_key === 'qb_having' ? "\nHAVING " : "\nWHERE ")
|
|
.implode("\n", $this->$qb_key);
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Compile GROUP BY
|
|
*
|
|
* Escapes identifiers in GROUP BY statements at execution time.
|
|
*
|
|
* Required so that aliases are tracked properly, regardless of wether
|
|
* group_by() is called prior to from(), join() and dbprefix is added
|
|
* only if needed.
|
|
*
|
|
* @return string SQL statement
|
|
*/
|
|
protected function _compile_group_by()
|
|
{
|
|
if (count($this->qb_groupby) > 0)
|
|
{
|
|
for ($i = 0, $c = count($this->qb_groupby); $i < $c; $i++)
|
|
{
|
|
// Is it already compiled?
|
|
if (is_string($this->qb_groupby[$i]))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
$this->qb_groupby[$i] = ($this->qb_groupby[$i]['escape'] === FALSE OR $this->_is_literal($this->qb_groupby[$i]['field']))
|
|
? $this->qb_groupby[$i]['field']
|
|
: $this->protect_identifiers($this->qb_groupby[$i]['field']);
|
|
}
|
|
|
|
return "\nGROUP BY ".implode(', ', $this->qb_groupby);
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Compile ORDER BY
|
|
*
|
|
* Escapes identifiers in ORDER BY statements at execution time.
|
|
*
|
|
* Required so that aliases are tracked properly, regardless of wether
|
|
* order_by() is called prior to from(), join() and dbprefix is added
|
|
* only if needed.
|
|
*
|
|
* @return string SQL statement
|
|
*/
|
|
protected function _compile_order_by()
|
|
{
|
|
if (is_array($this->qb_orderby) && count($this->qb_orderby) > 0)
|
|
{
|
|
for ($i = 0, $c = count($this->qb_orderby); $i < $c; $i++)
|
|
{
|
|
if ($this->qb_orderby[$i]['escape'] !== FALSE && ! $this->_is_literal($this->qb_orderby[$i]['field']))
|
|
{
|
|
$this->qb_orderby[$i]['field'] = $this->protect_identifiers($this->qb_orderby[$i]['field']);
|
|
}
|
|
|
|
$this->qb_orderby[$i] = $this->qb_orderby[$i]['field'].$this->qb_orderby[$i]['direction'];
|
|
}
|
|
|
|
return $this->qb_orderby = "\nORDER BY ".implode(', ', $this->qb_orderby);
|
|
}
|
|
elseif (is_string($this->qb_orderby))
|
|
{
|
|
return $this->qb_orderby;
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Object to Array
|
|
*
|
|
* Takes an object as input and converts the class variables to array key/vals
|
|
*
|
|
* @param object
|
|
* @return array
|
|
*/
|
|
protected function _object_to_array($object)
|
|
{
|
|
if ( ! is_object($object))
|
|
{
|
|
return $object;
|
|
}
|
|
|
|
$array = array();
|
|
foreach (get_object_vars($object) as $key => $val)
|
|
{
|
|
// There are some built in keys we need to ignore for this conversion
|
|
if ( ! is_object($val) && ! is_array($val) && $key !== '_parent_name')
|
|
{
|
|
$array[$key] = $val;
|
|
}
|
|
}
|
|
|
|
return $array;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Object to Array
|
|
*
|
|
* Takes an object as input and converts the class variables to array key/vals
|
|
*
|
|
* @param object
|
|
* @return array
|
|
*/
|
|
protected function _object_to_array_batch($object)
|
|
{
|
|
if ( ! is_object($object))
|
|
{
|
|
return $object;
|
|
}
|
|
|
|
$array = array();
|
|
$out = get_object_vars($object);
|
|
$fields = array_keys($out);
|
|
|
|
foreach ($fields as $val)
|
|
{
|
|
// There are some built in keys we need to ignore for this conversion
|
|
if ($val !== '_parent_name')
|
|
{
|
|
$i = 0;
|
|
foreach ($out[$val] as $data)
|
|
{
|
|
$array[$i++][$val] = $data;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $array;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Start Cache
|
|
*
|
|
* Starts QB caching
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function start_cache()
|
|
{
|
|
$this->qb_caching = TRUE;
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Stop Cache
|
|
*
|
|
* Stops QB caching
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function stop_cache()
|
|
{
|
|
$this->qb_caching = FALSE;
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Flush Cache
|
|
*
|
|
* Empties the QB cache
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function flush_cache()
|
|
{
|
|
$this->_reset_run(array(
|
|
'qb_cache_select' => array(),
|
|
'qb_cache_from' => array(),
|
|
'qb_cache_join' => array(),
|
|
'qb_cache_where' => array(),
|
|
'qb_cache_groupby' => array(),
|
|
'qb_cache_having' => array(),
|
|
'qb_cache_orderby' => array(),
|
|
'qb_cache_set' => array(),
|
|
'qb_cache_exists' => array(),
|
|
'qb_cache_no_escape' => array()
|
|
));
|
|
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Merge Cache
|
|
*
|
|
* When called, this function merges any cached QB arrays with
|
|
* locally called ones.
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _merge_cache()
|
|
{
|
|
if (count($this->qb_cache_exists) === 0)
|
|
{
|
|
return;
|
|
}
|
|
elseif (in_array('select', $this->qb_cache_exists, TRUE))
|
|
{
|
|
$qb_no_escape = $this->qb_cache_no_escape;
|
|
}
|
|
|
|
foreach (array_unique($this->qb_cache_exists) as $val) // select, from, etc.
|
|
{
|
|
$qb_variable = 'qb_'.$val;
|
|
$qb_cache_var = 'qb_cache_'.$val;
|
|
$qb_new = $this->$qb_cache_var;
|
|
|
|
for ($i = 0, $c = count($this->$qb_variable); $i < $c; $i++)
|
|
{
|
|
if ( ! in_array($this->{$qb_variable}[$i], $qb_new, TRUE))
|
|
{
|
|
$qb_new[] = $this->{$qb_variable}[$i];
|
|
if ($val === 'select')
|
|
{
|
|
$qb_no_escape[] = $this->qb_no_escape[$i];
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->$qb_variable = $qb_new;
|
|
if ($val === 'select')
|
|
{
|
|
$this->qb_no_escape = $qb_no_escape;
|
|
}
|
|
}
|
|
|
|
// If we are "protecting identifiers" we need to examine the "from"
|
|
// portion of the query to determine if there are any aliases
|
|
if ($this->_protect_identifiers === TRUE && count($this->qb_cache_from) > 0)
|
|
{
|
|
$this->_track_aliases($this->qb_from);
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Is literal
|
|
*
|
|
* Determines if a string represents a literal value or a field name
|
|
*
|
|
* @param string $str
|
|
* @return bool
|
|
*/
|
|
protected function _is_literal($str)
|
|
{
|
|
$str = trim($str);
|
|
|
|
if (empty($str) OR ctype_digit($str) OR (string) (float) $str === $str OR in_array(strtoupper($str), array('TRUE', 'FALSE'), TRUE))
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
static $_str;
|
|
|
|
if (empty($_str))
|
|
{
|
|
$_str = ($this->_escape_char !== '"')
|
|
? array('"', "'") : array("'");
|
|
}
|
|
|
|
return in_array($str[0], $_str, TRUE);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Reset Query Builder values.
|
|
*
|
|
* Publicly-visible method to reset the QB values.
|
|
*
|
|
* @return CI_DB_query_builder
|
|
*/
|
|
public function reset_query()
|
|
{
|
|
$this->_reset_select();
|
|
$this->_reset_write();
|
|
return $this;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Resets the query builder values. Called by the get() function
|
|
*
|
|
* @param array An array of fields to reset
|
|
* @return void
|
|
*/
|
|
protected function _reset_run($qb_reset_items)
|
|
{
|
|
foreach ($qb_reset_items as $item => $default_value)
|
|
{
|
|
$this->$item = $default_value;
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Resets the query builder values. Called by the get() function
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _reset_select()
|
|
{
|
|
$this->_reset_run(array(
|
|
'qb_select' => array(),
|
|
'qb_from' => array(),
|
|
'qb_join' => array(),
|
|
'qb_where' => array(),
|
|
'qb_groupby' => array(),
|
|
'qb_having' => array(),
|
|
'qb_orderby' => array(),
|
|
'qb_aliased_tables' => array(),
|
|
'qb_no_escape' => array(),
|
|
'qb_distinct' => FALSE,
|
|
'qb_limit' => FALSE,
|
|
'qb_offset' => FALSE
|
|
));
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Resets the query builder "write" values.
|
|
*
|
|
* Called by the insert() update() insert_batch() update_batch() and delete() functions
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _reset_write()
|
|
{
|
|
$this->_reset_run(array(
|
|
'qb_set' => array(),
|
|
'qb_from' => array(),
|
|
'qb_join' => array(),
|
|
'qb_where' => array(),
|
|
'qb_orderby' => array(),
|
|
'qb_keys' => array(),
|
|
'qb_limit' => FALSE
|
|
));
|
|
}
|
|
|
|
}
|