1045 行
24 KiB
PHP
1045 行
24 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 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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* Database Forge Class
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*
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/userguide3/database/
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*/
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abstract class CI_DB_forge {
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/**
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* Database object
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*
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* @var object
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*/
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protected $db;
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/**
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* Fields data
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*
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* @var array
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*/
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public $fields = array();
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/**
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* Keys data
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*
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* @var array
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*/
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public $keys = array();
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/**
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* Primary Keys data
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*
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* @var array
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*/
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public $primary_keys = array();
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/**
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* Database character set
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*
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* @var string
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*/
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public $db_char_set = '';
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// --------------------------------------------------------------------
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/**
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* CREATE DATABASE statement
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*
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* @var string
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*/
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protected $_create_database = 'CREATE DATABASE %s';
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/**
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* DROP DATABASE statement
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*
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* @var string
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*/
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protected $_drop_database = 'DROP DATABASE %s';
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/**
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* CREATE TABLE statement
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*
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* @var string
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*/
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protected $_create_table = "%s %s (%s\n)";
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/**
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* CREATE TABLE IF statement
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*
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* @var string
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*/
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protected $_create_table_if = 'CREATE TABLE IF NOT EXISTS';
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/**
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* CREATE TABLE keys flag
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*
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* Whether table keys are created from within the
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* CREATE TABLE statement.
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*
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* @var bool
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*/
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protected $_create_table_keys = FALSE;
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/**
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* DROP TABLE IF EXISTS statement
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*
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* @var string
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*/
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protected $_drop_table_if = 'DROP TABLE IF EXISTS';
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/**
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* RENAME TABLE statement
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*
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* @var string
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*/
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protected $_rename_table = 'ALTER TABLE %s RENAME TO %s;';
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/**
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* UNSIGNED support
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*
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* @var bool|array
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*/
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protected $_unsigned = TRUE;
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/**
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* NULL value representation in CREATE/ALTER TABLE statements
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*
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* @var string
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*/
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protected $_null = '';
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/**
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* DEFAULT value representation in CREATE/ALTER TABLE statements
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*
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* @var string
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*/
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protected $_default = ' DEFAULT ';
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// --------------------------------------------------------------------
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/**
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* Class constructor
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*
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* @param object &$db Database object
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* @return void
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*/
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public function __construct(&$db)
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{
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$this->db =& $db;
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log_message('info', 'Database Forge Class Initialized');
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}
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// --------------------------------------------------------------------
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/**
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* Create database
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*
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* @param string $db_name
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* @return bool
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*/
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public function create_database($db_name)
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{
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if ($this->_create_database === FALSE)
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
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}
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elseif ( ! $this->db->query(sprintf($this->_create_database, $this->db->escape_identifiers($db_name), $this->db->char_set, $this->db->dbcollat)))
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
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}
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if ( ! empty($this->db->data_cache['db_names']))
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{
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$this->db->data_cache['db_names'][] = $db_name;
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}
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Drop database
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*
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* @param string $db_name
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* @return bool
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*/
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public function drop_database($db_name)
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{
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if ($this->_drop_database === FALSE)
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
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}
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elseif ( ! $this->db->query(sprintf($this->_drop_database, $this->db->escape_identifiers($db_name))))
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
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}
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if ( ! empty($this->db->data_cache['db_names']))
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{
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$key = array_search(strtolower($db_name), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
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if ($key !== FALSE)
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{
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unset($this->db->data_cache['db_names'][$key]);
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}
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}
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Add Key
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*
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* @param string $key
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* @param bool $primary
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* @return CI_DB_forge
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*/
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public function add_key($key, $primary = FALSE)
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{
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// DO NOT change this! This condition is only applicable
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// for PRIMARY keys because you can only have one such,
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// and therefore all fields you add to it will be included
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// in the same, composite PRIMARY KEY.
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//
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// It's not the same for regular indexes.
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if ($primary === TRUE && is_array($key))
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{
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foreach ($key as $one)
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{
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$this->add_key($one, $primary);
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}
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return $this;
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}
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if ($primary === TRUE)
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{
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$this->primary_keys[] = $key;
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}
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else
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{
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$this->keys[] = $key;
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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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* Add Field
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*
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* @param array $field
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* @return CI_DB_forge
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*/
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public function add_field($field)
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{
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if (is_string($field))
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{
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if ($field === 'id')
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{
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$this->add_field(array(
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'id' => array(
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'type' => 'INT',
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'constraint' => 9,
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'auto_increment' => TRUE
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)
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));
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$this->add_key('id', TRUE);
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}
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else
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{
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if (strpos($field, ' ') === FALSE)
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{
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show_error('Field information is required for that operation.');
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}
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$this->fields[] = $field;
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}
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}
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if (is_array($field))
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{
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$this->fields = array_merge($this->fields, $field);
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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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* Create Table
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*
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* @param string $table Table name
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* @param bool $if_not_exists Whether to add IF NOT EXISTS condition
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* @param array $attributes Associative array of table attributes
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* @return bool
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*/
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public function create_table($table, $if_not_exists = FALSE, array $attributes = array())
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{
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if ($table === '')
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{
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show_error('A table name is required for that operation.');
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}
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else
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{
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$table = $this->db->dbprefix.$table;
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}
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if (count($this->fields) === 0)
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{
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show_error('Field information is required.');
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}
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$sql = $this->_create_table($table, $if_not_exists, $attributes);
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if (is_bool($sql))
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{
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$this->_reset();
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if ($sql === FALSE)
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
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}
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}
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if (($result = $this->db->query($sql)) !== FALSE)
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{
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if (isset($this->db->data_cache['table_names']))
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{
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$this->db->data_cache['table_names'][] = $table;
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}
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// Most databases don't support creating indexes from within the CREATE TABLE statement
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if ( ! empty($this->keys))
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{
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for ($i = 0, $sqls = $this->_process_indexes($table), $c = count($sqls); $i < $c; $i++)
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{
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$this->db->query($sqls[$i]);
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}
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}
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}
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$this->_reset();
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return $result;
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}
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// --------------------------------------------------------------------
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/**
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* Create Table
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*
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* @param string $table Table name
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* @param bool $if_not_exists Whether to add 'IF NOT EXISTS' condition
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* @param array $attributes Associative array of table attributes
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* @return mixed
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*/
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protected function _create_table($table, $if_not_exists, $attributes)
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{
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if ($if_not_exists === TRUE && $this->_create_table_if === FALSE)
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{
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if ($this->db->table_exists($table))
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{
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return TRUE;
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}
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$if_not_exists = FALSE;
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}
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$sql = ($if_not_exists)
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? sprintf($this->_create_table_if, $this->db->escape_identifiers($table))
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: 'CREATE TABLE';
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$columns = $this->_process_fields(TRUE);
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for ($i = 0, $c = count($columns); $i < $c; $i++)
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{
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$columns[$i] = ($columns[$i]['_literal'] !== FALSE)
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? "\n\t".$columns[$i]['_literal']
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: "\n\t".$this->_process_column($columns[$i]);
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}
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$columns = implode(',', $columns)
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.$this->_process_primary_keys($table);
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// Are indexes created from within the CREATE TABLE statement? (e.g. in MySQL)
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if ($this->_create_table_keys === TRUE)
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{
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$columns .= $this->_process_indexes($table);
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}
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// _create_table will usually have the following format: "%s %s (%s\n)"
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$sql = sprintf($this->_create_table.'%s',
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$sql,
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$this->db->escape_identifiers($table),
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$columns,
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$this->_create_table_attr($attributes)
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);
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return $sql;
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}
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// --------------------------------------------------------------------
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/**
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* CREATE TABLE attributes
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*
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* @param array $attributes Associative array of table attributes
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* @return string
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*/
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protected function _create_table_attr($attributes)
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{
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$sql = '';
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foreach (array_keys($attributes) as $key)
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{
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if (is_string($key))
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{
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$sql .= ' '.strtoupper($key).' '.$attributes[$key];
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}
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}
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return $sql;
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}
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// --------------------------------------------------------------------
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/**
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* Drop Table
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*
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* @param string $table_name Table name
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* @param bool $if_exists Whether to add an IF EXISTS condition
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* @return bool
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*/
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public function drop_table($table_name, $if_exists = FALSE)
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{
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if ($table_name === '')
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_table_name_required') : FALSE;
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}
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if (($query = $this->_drop_table($this->db->dbprefix.$table_name, $if_exists)) === TRUE)
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{
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return TRUE;
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}
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$query = $this->db->query($query);
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// Update table list cache
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if ($query && ! empty($this->db->data_cache['table_names']))
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{
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$key = array_search(strtolower($this->db->dbprefix.$table_name), array_map('strtolower', $this->db->data_cache['table_names']), TRUE);
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if ($key !== FALSE)
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{
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unset($this->db->data_cache['table_names'][$key]);
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}
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}
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return $query;
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}
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// --------------------------------------------------------------------
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/**
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* Drop Table
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*
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* Generates a platform-specific DROP TABLE string
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*
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* @param string $table Table name
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* @param bool $if_exists Whether to add an IF EXISTS condition
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* @return mixed (Returns a platform-specific DROP table string, or TRUE to indicate there's nothing to do)
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*/
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protected function _drop_table($table, $if_exists)
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{
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$sql = 'DROP TABLE';
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if ($if_exists)
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{
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if ($this->_drop_table_if === FALSE)
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{
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if ( ! $this->db->table_exists($table))
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{
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return TRUE;
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}
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}
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else
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{
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$sql = sprintf($this->_drop_table_if, $this->db->escape_identifiers($table));
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}
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}
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return $sql.' '.$this->db->escape_identifiers($table);
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}
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// --------------------------------------------------------------------
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/**
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* Rename Table
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*
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* @param string $table_name Old table name
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* @param string $new_table_name New table name
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* @return bool
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*/
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public function rename_table($table_name, $new_table_name)
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{
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if ($table_name === '' OR $new_table_name === '')
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{
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show_error('A table name is required for that operation.');
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return FALSE;
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}
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elseif ($this->_rename_table === FALSE)
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
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}
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$result = $this->db->query(sprintf($this->_rename_table,
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$this->db->escape_identifiers($this->db->dbprefix.$table_name),
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$this->db->escape_identifiers($this->db->dbprefix.$new_table_name))
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);
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if ($result && ! empty($this->db->data_cache['table_names']))
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{
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$key = array_search(strtolower($this->db->dbprefix.$table_name), array_map('strtolower', $this->db->data_cache['table_names']), TRUE);
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if ($key !== FALSE)
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{
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$this->db->data_cache['table_names'][$key] = $this->db->dbprefix.$new_table_name;
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}
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}
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return $result;
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}
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// --------------------------------------------------------------------
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/**
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* Column Add
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*
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* @todo Remove deprecated $_after option in 3.1+
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* @param string $table Table name
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* @param array $field Column definition
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* @param string $_after Column for AFTER clause (deprecated)
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* @return bool
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*/
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public function add_column($table, $field, $_after = NULL)
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{
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// Work-around for literal column definitions
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is_array($field) OR $field = array($field);
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foreach (array_keys($field) as $k)
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{
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// Backwards-compatibility work-around for MySQL/CUBRID AFTER clause (remove in 3.1+)
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if ($_after !== NULL && is_array($field[$k]) && ! isset($field[$k]['after']))
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{
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$field[$k]['after'] = $_after;
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}
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$this->add_field(array($k => $field[$k]));
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}
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$sqls = $this->_alter_table('ADD', $this->db->dbprefix.$table, $this->_process_fields());
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$this->_reset();
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if ($sqls === FALSE)
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{
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return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
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}
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for ($i = 0, $c = count($sqls); $i < $c; $i++)
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{
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if ($this->db->query($sqls[$i]) === FALSE)
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{
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return FALSE;
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}
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}
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
|
|
* Column Drop
|
|
*
|
|
* @param string $table Table name
|
|
* @param string $column_name Column name
|
|
* @return bool
|
|
*/
|
|
public function drop_column($table, $column_name)
|
|
{
|
|
$sql = $this->_alter_table('DROP', $this->db->dbprefix.$table, $column_name);
|
|
if ($sql === FALSE)
|
|
{
|
|
return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
return $this->db->query($sql);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Column Modify
|
|
*
|
|
* @param string $table Table name
|
|
* @param string $field Column definition
|
|
* @return bool
|
|
*/
|
|
public function modify_column($table, $field)
|
|
{
|
|
// Work-around for literal column definitions
|
|
is_array($field) OR $field = array($field);
|
|
|
|
foreach (array_keys($field) as $k)
|
|
{
|
|
$this->add_field(array($k => $field[$k]));
|
|
}
|
|
|
|
if (count($this->fields) === 0)
|
|
{
|
|
show_error('Field information is required.');
|
|
}
|
|
|
|
$sqls = $this->_alter_table('CHANGE', $this->db->dbprefix.$table, $this->_process_fields());
|
|
$this->_reset();
|
|
if ($sqls === FALSE)
|
|
{
|
|
return ($this->db->db_debug) ? $this->db->display_error('db_unsupported_feature') : FALSE;
|
|
}
|
|
|
|
for ($i = 0, $c = count($sqls); $i < $c; $i++)
|
|
{
|
|
if ($this->db->query($sqls[$i]) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* ALTER TABLE
|
|
*
|
|
* @param string $alter_type ALTER type
|
|
* @param string $table Table name
|
|
* @param mixed $field Column definition
|
|
* @return string|string[]
|
|
*/
|
|
protected function _alter_table($alter_type, $table, $field)
|
|
{
|
|
$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' ';
|
|
|
|
// DROP has everything it needs now.
|
|
if ($alter_type === 'DROP')
|
|
{
|
|
return $sql.'DROP COLUMN '.$this->db->escape_identifiers($field);
|
|
}
|
|
|
|
$sql .= ($alter_type === 'ADD')
|
|
? 'ADD '
|
|
: $alter_type.' COLUMN ';
|
|
|
|
$sqls = array();
|
|
for ($i = 0, $c = count($field); $i < $c; $i++)
|
|
{
|
|
$sqls[] = $sql
|
|
.($field[$i]['_literal'] !== FALSE ? $field[$i]['_literal'] : $this->_process_column($field[$i]));
|
|
}
|
|
|
|
return $sqls;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Process fields
|
|
*
|
|
* @param bool $create_table
|
|
* @return array
|
|
*/
|
|
protected function _process_fields($create_table = FALSE)
|
|
{
|
|
$fields = array();
|
|
|
|
foreach ($this->fields as $key => $attributes)
|
|
{
|
|
if (is_int($key) && ! is_array($attributes))
|
|
{
|
|
$fields[] = array('_literal' => $attributes);
|
|
continue;
|
|
}
|
|
|
|
$attributes = array_change_key_case($attributes, CASE_UPPER);
|
|
|
|
if ($create_table === TRUE && empty($attributes['TYPE']))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
isset($attributes['TYPE']) && $this->_attr_type($attributes);
|
|
|
|
$field = array(
|
|
'name' => $key,
|
|
'new_name' => isset($attributes['NAME']) ? $attributes['NAME'] : NULL,
|
|
'type' => isset($attributes['TYPE']) ? $attributes['TYPE'] : NULL,
|
|
'length' => '',
|
|
'unsigned' => '',
|
|
'null' => NULL,
|
|
'unique' => '',
|
|
'default' => '',
|
|
'auto_increment' => '',
|
|
'_literal' => FALSE
|
|
);
|
|
|
|
isset($attributes['TYPE']) && $this->_attr_unsigned($attributes, $field);
|
|
|
|
if ($create_table === FALSE)
|
|
{
|
|
if (isset($attributes['AFTER']))
|
|
{
|
|
$field['after'] = $attributes['AFTER'];
|
|
}
|
|
elseif (isset($attributes['FIRST']))
|
|
{
|
|
$field['first'] = (bool) $attributes['FIRST'];
|
|
}
|
|
}
|
|
|
|
$this->_attr_default($attributes, $field);
|
|
|
|
if (isset($attributes['NULL']))
|
|
{
|
|
if ($attributes['NULL'] === TRUE)
|
|
{
|
|
$field['null'] = empty($this->_null) ? '' : ' '.$this->_null;
|
|
}
|
|
else
|
|
{
|
|
$field['null'] = ' NOT NULL';
|
|
}
|
|
}
|
|
elseif ($create_table === TRUE)
|
|
{
|
|
$field['null'] = ' NOT NULL';
|
|
}
|
|
|
|
$this->_attr_auto_increment($attributes, $field);
|
|
$this->_attr_unique($attributes, $field);
|
|
|
|
if (isset($attributes['COMMENT']))
|
|
{
|
|
$field['comment'] = $this->db->escape($attributes['COMMENT']);
|
|
}
|
|
|
|
if (isset($attributes['TYPE']) && ! empty($attributes['CONSTRAINT']))
|
|
{
|
|
switch (strtoupper($attributes['TYPE']))
|
|
{
|
|
case 'ENUM':
|
|
case 'SET':
|
|
$attributes['CONSTRAINT'] = $this->db->escape($attributes['CONSTRAINT']);
|
|
default:
|
|
$field['length'] = is_array($attributes['CONSTRAINT'])
|
|
? '('.implode(',', $attributes['CONSTRAINT']).')'
|
|
: '('.$attributes['CONSTRAINT'].')';
|
|
break;
|
|
}
|
|
}
|
|
|
|
$fields[] = $field;
|
|
}
|
|
|
|
return $fields;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Process column
|
|
*
|
|
* @param array $field
|
|
* @return string
|
|
*/
|
|
protected function _process_column($field)
|
|
{
|
|
return $this->db->escape_identifiers($field['name'])
|
|
.' '.$field['type'].$field['length']
|
|
.$field['unsigned']
|
|
.$field['default']
|
|
.$field['null']
|
|
.$field['auto_increment']
|
|
.$field['unique'];
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Field attribute TYPE
|
|
*
|
|
* Performs a data type mapping between different databases.
|
|
*
|
|
* @param array &$attributes
|
|
* @return void
|
|
*/
|
|
protected function _attr_type(&$attributes)
|
|
{
|
|
// Usually overridden by drivers
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Field attribute UNSIGNED
|
|
*
|
|
* Depending on the _unsigned property value:
|
|
*
|
|
* - TRUE will always set $field['unsigned'] to 'UNSIGNED'
|
|
* - FALSE will always set $field['unsigned'] to ''
|
|
* - array(TYPE) will set $field['unsigned'] to 'UNSIGNED',
|
|
* if $attributes['TYPE'] is found in the array
|
|
* - array(TYPE => UTYPE) will change $field['type'],
|
|
* from TYPE to UTYPE in case of a match
|
|
*
|
|
* @param array &$attributes
|
|
* @param array &$field
|
|
* @return void
|
|
*/
|
|
protected function _attr_unsigned(&$attributes, &$field)
|
|
{
|
|
if (empty($attributes['UNSIGNED']) OR $attributes['UNSIGNED'] !== TRUE)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Reset the attribute in order to avoid issues if we do type conversion
|
|
$attributes['UNSIGNED'] = FALSE;
|
|
|
|
if (is_array($this->_unsigned))
|
|
{
|
|
foreach (array_keys($this->_unsigned) as $key)
|
|
{
|
|
if (is_int($key) && strcasecmp($attributes['TYPE'], $this->_unsigned[$key]) === 0)
|
|
{
|
|
$field['unsigned'] = ' UNSIGNED';
|
|
return;
|
|
}
|
|
elseif (is_string($key) && strcasecmp($attributes['TYPE'], $key) === 0)
|
|
{
|
|
$field['type'] = $key;
|
|
return;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
$field['unsigned'] = ($this->_unsigned === TRUE) ? ' UNSIGNED' : '';
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Field attribute DEFAULT
|
|
*
|
|
* @param array &$attributes
|
|
* @param array &$field
|
|
* @return void
|
|
*/
|
|
protected function _attr_default(&$attributes, &$field)
|
|
{
|
|
if ($this->_default === FALSE)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ( ! array_key_exists('DEFAULT', $attributes))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if ($attributes['DEFAULT'] === NULL)
|
|
{
|
|
$field['default'] = empty($this->_null) ? '' : $this->_default.$this->_null;
|
|
|
|
// Override the NULL attribute if that's our default
|
|
$attributes['NULL'] = TRUE;
|
|
$field['null'] = empty($this->_null) ? '' : ' '.$this->_null;
|
|
return;
|
|
}
|
|
|
|
// White-list CURRENT_TIMESTAMP & similar (e.g. Oracle has stuff like SYSTIMESTAMP) defaults for date/time fields
|
|
if (
|
|
isset($attributes['TYPE'])
|
|
&& (stripos($attributes['TYPE'], 'time') !== FALSE OR stripos($attributes['TYPE'], 'date') !== FALSE)
|
|
&& (stripos($attributes['DEFAULT'], 'time') !== FALSE OR stripos($attributes['DEFAULT'], 'date') !== FALSE)
|
|
)
|
|
{
|
|
$field['default'] = $this->_default.$attributes['DEFAULT'];
|
|
return;
|
|
}
|
|
|
|
$field['default'] = $this->_default.$this->db->escape($attributes['DEFAULT']);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Field attribute UNIQUE
|
|
*
|
|
* @param array &$attributes
|
|
* @param array &$field
|
|
* @return void
|
|
*/
|
|
protected function _attr_unique(&$attributes, &$field)
|
|
{
|
|
if ( ! empty($attributes['UNIQUE']) && $attributes['UNIQUE'] === TRUE)
|
|
{
|
|
$field['unique'] = ' UNIQUE';
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Field attribute AUTO_INCREMENT
|
|
*
|
|
* @param array &$attributes
|
|
* @param array &$field
|
|
* @return void
|
|
*/
|
|
protected function _attr_auto_increment(&$attributes, &$field)
|
|
{
|
|
if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
|
|
{
|
|
$field['auto_increment'] = ' AUTO_INCREMENT';
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Process primary keys
|
|
*
|
|
* @param string $table Table name
|
|
* @return string
|
|
*/
|
|
protected function _process_primary_keys($table)
|
|
{
|
|
$sql = '';
|
|
|
|
for ($i = 0, $c = count($this->primary_keys); $i < $c; $i++)
|
|
{
|
|
if ( ! isset($this->fields[$this->primary_keys[$i]]))
|
|
{
|
|
unset($this->primary_keys[$i]);
|
|
}
|
|
}
|
|
|
|
if (count($this->primary_keys) > 0)
|
|
{
|
|
$sql .= ",\n\tCONSTRAINT ".$this->db->escape_identifiers('pk_'.$table)
|
|
.' PRIMARY KEY('.implode(', ', $this->db->escape_identifiers($this->primary_keys)).')';
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Process indexes
|
|
*
|
|
* @param string $table Table name
|
|
* @return string[] list of SQL statements
|
|
*/
|
|
protected function _process_indexes($table)
|
|
{
|
|
$sqls = array();
|
|
|
|
for ($i = 0, $c = count($this->keys); $i < $c; $i++)
|
|
{
|
|
if (is_array($this->keys[$i]))
|
|
{
|
|
for ($i2 = 0, $c2 = count($this->keys[$i]); $i2 < $c2; $i2++)
|
|
{
|
|
if ( ! isset($this->fields[$this->keys[$i][$i2]]))
|
|
{
|
|
unset($this->keys[$i][$i2]);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
elseif ( ! isset($this->fields[$this->keys[$i]]))
|
|
{
|
|
unset($this->keys[$i]);
|
|
continue;
|
|
}
|
|
|
|
is_array($this->keys[$i]) OR $this->keys[$i] = array($this->keys[$i]);
|
|
|
|
$sqls[] = 'CREATE INDEX '.$this->db->escape_identifiers($table.'_'.implode('_', $this->keys[$i]))
|
|
.' ON '.$this->db->escape_identifiers($table)
|
|
.' ('.implode(', ', $this->db->escape_identifiers($this->keys[$i])).');';
|
|
}
|
|
|
|
return $sqls;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Reset
|
|
*
|
|
* Resets table creation vars
|
|
*
|
|
* @return void
|
|
*/
|
|
protected function _reset()
|
|
{
|
|
$this->fields = $this->keys = $this->primary_keys = array();
|
|
}
|
|
|
|
}
|