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/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php

https://bitbucket.org/Naked_Yoshi/sq_kanban
PHP | 149 lines | 51 code | 14 blank | 84 comment | 8 complexity | 57295711e8deba9f977685e2d017ca37 MD5 | raw file
  1<?php
  2/**
  3 * CodeIgniter
  4 *
  5 * An open source application development framework for PHP
  6 *
  7 * This content is released under the MIT License (MIT)
  8 *
  9 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
 10 *
 11 * Permission is hereby granted, free of charge, to any person obtaining a copy
 12 * of this software and associated documentation files (the "Software"), to deal
 13 * in the Software without restriction, including without limitation the rights
 14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 15 * copies of the Software, and to permit persons to whom the Software is
 16 * furnished to do so, subject to the following conditions:
 17 *
 18 * The above copyright notice and this permission notice shall be included in
 19 * all copies or substantial portions of the Software.
 20 *
 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 27 * THE SOFTWARE.
 28 *
 29 * @package	CodeIgniter
 30 * @author	EllisLab Dev Team
 31 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 32 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
 33 * @license	http://opensource.org/licenses/MIT	MIT License
 34 * @link	https://codeigniter.com
 35 * @since	Version 3.0.0
 36 * @filesource
 37 */
 38defined('BASEPATH') OR exit('No direct script access allowed');
 39
 40/**
 41 * PDO DBLIB Forge Class
 42 *
 43 * @category	Database
 44 * @author		EllisLab Dev Team
 45 * @link		https://codeigniter.com/user_guide/database/
 46 */
 47class CI_DB_pdo_dblib_forge extends CI_DB_pdo_forge {
 48
 49	/**
 50	 * CREATE TABLE IF statement
 51	 *
 52	 * @var	string
 53	 */
 54	protected $_create_table_if	= "IF NOT EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nCREATE TABLE";
 55
 56	/**
 57	 * DROP TABLE IF statement
 58	 *
 59	 * @var	string
 60	 */
 61	protected $_drop_table_if	= "IF EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nDROP TABLE";
 62
 63	/**
 64	 * UNSIGNED support
 65	 *
 66	 * @var	array
 67	 */
 68	protected $_unsigned		= array(
 69		'TINYINT'	=> 'SMALLINT',
 70		'SMALLINT'	=> 'INT',
 71		'INT'		=> 'BIGINT',
 72		'REAL'		=> 'FLOAT'
 73	);
 74
 75	// --------------------------------------------------------------------
 76
 77	/**
 78	 * ALTER TABLE
 79	 *
 80	 * @param	string	$alter_type	ALTER type
 81	 * @param	string	$table		Table name
 82	 * @param	mixed	$field		Column definition
 83	 * @return	string|string[]
 84	 */
 85	protected function _alter_table($alter_type, $table, $field)
 86	{
 87		if (in_array($alter_type, array('ADD', 'DROP'), TRUE))
 88		{
 89			return parent::_alter_table($alter_type, $table, $field);
 90		}
 91
 92		$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' ALTER COLUMN ';
 93		$sqls = array();
 94		for ($i = 0, $c = count($field); $i < $c; $i++)
 95		{
 96			$sqls[] = $sql.$this->_process_column($field[$i]);
 97		}
 98
 99		return $sqls;
100	}
101
102	// --------------------------------------------------------------------
103
104	/**
105	 * Field attribute TYPE
106	 *
107	 * Performs a data type mapping between different databases.
108	 *
109	 * @param	array	&$attributes
110	 * @return	void
111	 */
112	protected function _attr_type(&$attributes)
113	{
114		if (isset($attributes['CONSTRAINT']) && strpos($attributes['TYPE'], 'INT') !== FALSE)
115		{
116			unset($attributes['CONSTRAINT']);
117		}
118
119		switch (strtoupper($attributes['TYPE']))
120		{
121			case 'MEDIUMINT':
122				$attributes['TYPE'] = 'INTEGER';
123				$attributes['UNSIGNED'] = FALSE;
124				return;
125			case 'INTEGER':
126				$attributes['TYPE'] = 'INT';
127				return;
128			default: return;
129		}
130	}
131
132	// --------------------------------------------------------------------
133
134	/**
135	 * Field attribute AUTO_INCREMENT
136	 *
137	 * @param	array	&$attributes
138	 * @param	array	&$field
139	 * @return	void
140	 */
141	protected function _attr_auto_increment(&$attributes, &$field)
142	{
143		if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
144		{
145			$field['auto_increment'] = ' IDENTITY(1,1)';
146		}
147	}
148
149}