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<?php |
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/** |
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* CodeIgniter |
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* |
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* An open source application development framework for PHP |
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* |
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* This content is released under the MIT License (MIT) |
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* |
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* Copyright (c) 2014 - 2017, British Columbia Institute of Technology |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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* |
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* @package CodeIgniter |
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* @author EllisLab Dev Team |
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) |
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* @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/) |
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* @license http://opensource.org/licenses/MIT MIT License |
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* @link https://codeigniter.com |
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* @since Version 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 https://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 data set for update_batch() |
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* |
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* @var array |
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*/ |
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protected $qb_set_ub = 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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if ( ! $this->_has_operator($cond)) |
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{ |
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$cond = ' USING ('.($escape ? $this->escape_identifiers($cond) : $cond).')'; |
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} |
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elseif ($escape === FALSE) |
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{ |
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$cond = ' ON '.$cond; |
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} |
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else |
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{ |
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// Split multiple conditions |
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if (preg_match_all('/\sAND\s|\sOR\s/i', $cond, $joints, PREG_OFFSET_CAPTURE)) |
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{ |
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$conditions = array(); |
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$joints = $joints[0]; |
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array_unshift($joints, array('', 0)); |
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for ($i = count($joints) - 1, $pos = strlen($cond); $i >= 0; $i--) |
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{ |
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$joints[$i][1] += strlen($joints[$i][0]); // offset |
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$conditions[$i] = substr($cond, $joints[$i][1], $pos - $joints[$i][1]); |
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$pos = $joints[$i][1] - strlen($joints[$i][0]); |
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$joints[$i] = $joints[$i][0]; |
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} |
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} |
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else |
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{ |
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$conditions = array($cond); |
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$joints = array(''); |
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} |
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$cond = ' ON '; |
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for ($i = 0, $c = count($conditions); $i < $c; $i++) |
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{ |
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$operator = $this->_get_operator($conditions[$i]); |
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$cond .= $joints[$i]; |
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$cond .= preg_match("/(\(*)?([\[\]\w\.'-]+)".preg_quote($operator)."(.*)/i", $conditions[$i], $match) |
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? $match[1].$this->protect_identifiers($match[2]).$operator.$this->protect_identifiers($match[3]) |
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: $conditions[$i]; |
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} |
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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 $this; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* WHERE |
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* |
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* Generates the WHERE portion of the query. |
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* Separates multiple calls with 'AND'. |
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* |
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* @param mixed |
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* @param mixed |
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* @param bool |
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* @return CI_DB_query_builder |
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*/ |
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public function where($key, $value = NULL, $escape = NULL) |
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{ |
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return $this->_wh('qb_where', $key, $value, 'AND ', $escape); |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* OR WHERE |
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* |
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* Generates the WHERE portion of the query. |
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* Separates multiple calls with 'OR'. |
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* |
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* @param mixed |
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* @param mixed |
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* @param bool |
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* @return CI_DB_query_builder |
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*/ |
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public function or_where($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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/** |
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* WHERE, HAVING |
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* |
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* @used-by where() |
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* @used-by or_where() |
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* @used-by having() |
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* @used-by or_having() |
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* |
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* @param string $qb_key 'qb_where' or 'qb_having' |
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* @param mixed $key |
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* @param mixed $value |
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* @param string $type |
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* @param bool $escape |
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* @return CI_DB_query_builder |
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*/ |
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protected function _wh($qb_key, $key, $value = NULL, $type = 'AND ', $escape = NULL) |
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{ |
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$qb_cache_key = ($qb_key === 'qb_having') ? 'qb_cache_having' : 'qb_cache_where'; |
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|
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if ( ! is_array($key)) |
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{ |
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$key = array($key => $value); |
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} |
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// If the escape value was not set will base it on the global setting |
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is_bool($escape) OR $escape = $this->_protect_identifiers; |
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foreach ($key as $k => $v) |
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{ |
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$prefix = (count($this->$qb_key) === 0 && count($this->$qb_cache_key) === 0) |
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? $this->_group_get_type('') |
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: $this->_group_get_type($type); |
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if ($v !== NULL) |
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{ |
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if ($escape === TRUE) |
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{ |
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$v = ' '.$this->escape($v); |
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} |
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if ( ! $this->_has_operator($k)) |
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{ |
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$k .= ' = '; |
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} |
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} |
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elseif ( ! $this->_has_operator($k)) |
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{ |
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// value appears not to have been set, assign the test to IS NULL |
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$k .= ' IS NULL'; |
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} |
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elseif (preg_match('/\s*(!?=|<>|\sIS(?:\s+NOT)?\s)\s*$/i', $k, $match, PREG_OFFSET_CAPTURE)) |
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{ |
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$k = substr($k, 0, $match[0][1]).($match[1][0] === '=' ? ' IS NULL' : ' IS NOT NULL'); |
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} |
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$this->{$qb_key}[] = array('condition' => $prefix.$k.$v, 'escape' => $escape); |
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if ($this->qb_caching === TRUE) |
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{ |
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$this->{$qb_cache_key}[] = array('condition' => $prefix.$k.$v, 'escape' => $escape); |
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$this->qb_cache_exists[] = substr($qb_key, 3); |
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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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/** |
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* 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' : ''; |
|
|
|
if ($escape === TRUE) |
|
{ |
|
$where_in = array(); |
|
foreach ($values as $value) |
|
{ |
|
$where_in[] = $this->escape($value); |
|
} |
|
} |
|
else |
|
{ |
|
$where_in = array_values($values); |
|
} |
|
|
|
$prefix = (count($this->qb_where) === 0 && count($this->qb_cache_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; |
|
// lowercase $side in case somebody writes e.g. 'BEFORE' instead of 'before' (doh) |
|
$side = strtolower($side); |
|
|
|
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); |
|
|
|
if ($escape === TRUE) |
|
{ |
|
$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 '%{$v}%'"; |
|
} |
|
|
|
// some platforms require an escape sequence definition for LIKE wildcards |
|
if ($escape === TRUE && $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 $escape |
|
* @return CI_DB_query_builder |
|
*/ |
|
public function having($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 $escape |
|
* @return CI_DB_query_builder |
|
*/ |
|
public function or_having($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.', ' : '').(int) $this->qb_limit; |
|
} |
|
|
|
// -------------------------------------------------------------------- |
|
|
|
/** |
|
* The "set" function. |
|
* |
|
* Allows key/value pairs to be set for inserting or updating |
|
* |
|
* @param mixed |
|
* @param string |
|
* @param bool |
|
* @return CI_DB_query_builder |
|
*/ |
|
public function set($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 $this; |
|
} |
|
|
|
// -------------------------------------------------------------------- |
|
|
|
/** |
|
* Get SELECT query string |
|
* |
|
* Compiles a SELECT query string and returns the sql. |
|
* |
|
* @param string the table name to select from (optional) |
|
* @param bool TRUE: resets QB values; FALSE: leave QB values alone |
|
* @return string |
|
*/ |
|
public function get_compiled_select($table = '', $reset = TRUE) |
|
{ |
|
if ($table !== '') |
|
{ |
|
$this->_track_aliases($table); |
|
$this->from($table); |
|
} |
|
|
|
$select = $this->_compile_select(); |
|
|
|
if ($reset === TRUE) |
|
{ |
|
$this->_reset_select(); |
|
} |
|
|
|
return $select; |
|
} |
|
|
|
// -------------------------------------------------------------------- |
|
|
|
/** |
|
* Get |
|
* |
|
* Compiles the select statement based on the other functions called |
|
* and runs the query |
|
* |
|
* @param string the table |
|
* @param string the limit clause |
|
* @param string the offset clause |
|
* @return CI_DB_result |
|
*/ |
|
public function get($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); |
|
} |
|
|
|
// ORDER BY usage is often problematic here (most notably |
|
// on Microsoft SQL Server) and ultimately unnecessary |
|
// for selecting COUNT(*) ... |
|
if ( ! empty($this->qb_orderby)) |
|
{ |
|
$orderby = $this->qb_orderby; |
|
$this->qb_orderby = NULL; |
|
} |
|
|
|
$result = ($this->qb_distinct === TRUE OR ! empty($this->qb_groupby) OR ! empty($this->qb_cache_groupby)) |
|
? $this->query($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) |
|
{ |
|
$this->_reset_select(); |
|
} |
|
// If we've previously reset the qb_orderby values, get them back |
|
elseif ( ! isset($this->qb_orderby)) |
|
{ |
|
$this->qb_orderby = $orderby; |
|
} |
|
|
|
if ($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 $offset |
|
* @return CI_DB_result |
|
*/ |
|
public function get_where($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, $batch_size = 100) |
|
{ |
|
if ($set === NULL) |
|
{ |
|
if (empty($this->qb_set)) |
|
{ |
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE; |
|
} |
|
} |
|
else |
|
{ |
|
if (empty($set)) |
|
{ |
|
return ($this->db_debug) ? $this->display_error('insert_batch() called with no data') : FALSE; |
|
} |
|
|
|
$this->set_insert_batch($set, '', $escape); |
|
} |
|
|
|
if (strlen($table) === 0) |
|
{ |
|
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 += $batch_size) |
|
{ |
|
if ($this->query($this->_insert_batch($this->protect_identifiers($table, TRUE, $escape, FALSE), $this->qb_keys, array_slice($this->qb_set, $i, $batch_size)))) |
|
{ |
|
$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(reset($key))); |
|
sort($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 $escape Whether to escape values and identifiers |
|
* @return bool TRUE on success, FALSE on failure |
|
*/ |
|
public function insert($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) ? $this->display_error('db_must_set_table') : FALSE; |
|
} |
|
|
|
return TRUE; |
|
} |
|
|
|
// -------------------------------------------------------------------- |
|
|
|
/** |
|
* Replace |
|
* |
|
* Compiles an replace into string and runs the query |
|
* |
|
* @param string the table to replace data into |
|
* @param array an associative array of insert values |
|
* @return bool TRUE on success, FALSE on failure |
|
*/ |
|
public function replace($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->qb_from[0], $this->qb_set); |
|
|
|
if ($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 $limit |
|
* @return bool TRUE on success, FALSE on failure |
|
*/ |
|
public function update($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->qb_from[0], $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 !== '') |
|
{ |
|
$this->qb_from = array($this->protect_identifiers($table, TRUE, NULL, FALSE)); |
|
} |
|
elseif ( ! isset($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, $batch_size = 100) |
|
{ |
|
// 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) |
|
{ |
|
if (empty($this->qb_set_ub)) |
|
{ |
|
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE; |
|
} |
|
} |
|
else |
|
{ |
|
if (empty($set)) |
|
{ |
|
return ($this->db_debug) ? $this->display_error('update_batch() called with no data') : FALSE; |
|
} |
|
|
|
$this->set_update_batch($set, $index); |
|
} |
|
|
|
if (strlen($table) === 0) |
|
{ |
|
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_ub); $i < $total; $i += $batch_size) |
|
{ |
|
if ($this->query($this->_update_batch($this->protect_identifiers($table, TRUE, NULL, FALSE), array_slice($this->qb_set_ub, $i, $batch_size), $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]['value']; |
|
|
|
foreach (array_keys($val) as $field) |
|
{ |
|
if ($field !== $index) |
|
{ |
|
$final[$val[$field]['field']][] = 'WHEN '.$val[$index]['field'].' = '.$val[$index]['value'].' THEN '.$val[$field]['value']; |
|
} |
|
} |
|
} |
|
|
|
$cases = ''; |
|
foreach ($final as $k => $v) |
|
{ |
|
$cases .= $k." = CASE \n" |
|
.implode("\n", $v)."\n" |
|
.'ELSE '.$k.' END, '; |
|
} |
|
|
|
$this->where($val[$index]['field'].' 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; |
|
} |
|
|
|
$clean[$k2] = array( |
|
'field' => $this->protect_identifiers($k2, FALSE, $escape), |
|
'value' => ($escape === FALSE ? $v2 : $this->escape($v2)) |
|
); |
|
} |
|
|
|
if ($index_set === FALSE) |
|
{ |
|
return $this->display_error('db_batch_missing_index'); |
|
} |
|
|
|
$this->qb_set_ub[] = $clean; |
|
} |
|
|
|
return $this; |
|
} |
|
|
|
// -------------------------------------------------------------------- |
|
|
|
/** |
|
* Empty Table |
|
* |
|
* Compiles a delete string and runs "DELETE FROM table" |
|
* |
|
* @param string the table to empty |
|
* @return bool TRUE on success, FALSE on failure |
|
*/ |
|
public function empty_table($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 bool TRUE on success, FALSE on failure |
|
*/ |
|
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)) |
|
{ |
|
empty($where) && $reset_data = FALSE; |
|
|
|
foreach ($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) |
|
{ |
|
$sql .= '*'; |
|
} |
|
else |
|
{ |
|
// Cycle through the "select" portion of the query and prep each column name. |
|
// The reason we protect identifiers here rather than in the select() function |
|
// is because until the user calls the from() function we don't know if there are aliases |
|
foreach ($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 OR $this->qb_offset) |
|
{ |
|
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 whether |
|
* 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_set_ub' => array(), |
|
'qb_from' => array(), |
|
'qb_join' => array(), |
|
'qb_where' => array(), |
|
'qb_orderby' => array(), |
|
'qb_keys' => array(), |
|
'qb_limit' => FALSE |
|
)); |
|
} |
|
|
|
} |
