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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 - 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 1.3.0
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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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* MS SQL Forge 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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class CI_DB_mssql_forge extends CI_DB_forge {
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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 = "IF NOT EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nCREATE TABLE";
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/**
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* DROP TABLE IF statement
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*
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* @var string
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*/
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protected $_drop_table_if = "IF EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nDROP TABLE";
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/**
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* UNSIGNED support
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*
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* @var array
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*/
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protected $_unsigned = array(
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'TINYINT' => 'SMALLINT',
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'SMALLINT' => 'INT',
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'INT' => 'BIGINT',
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'REAL' => 'FLOAT'
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);
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// --------------------------------------------------------------------
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/**
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* ALTER TABLE
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*
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* @param string $alter_type ALTER type
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* @param string $table Table name
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* @param mixed $field Column definition
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* @return string|string[]
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*/
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protected function _alter_table($alter_type, $table, $field)
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{
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if (in_array($alter_type, array('ADD', 'DROP'), TRUE))
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{
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return parent::_alter_table($alter_type, $table, $field);
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}
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$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' ALTER COLUMN ';
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$sqls = array();
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for ($i = 0, $c = count($field); $i < $c; $i++)
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{
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$sqls[] = $sql.$this->_process_column($field[$i]);
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}
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return $sqls;
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}
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// --------------------------------------------------------------------
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/**
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* Field attribute TYPE
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*
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* Performs a data type mapping between different databases.
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*
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* @param array &$attributes
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* @return void
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*/
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protected function _attr_type(&$attributes)
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{
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if (isset($attributes['CONSTRAINT']) && strpos($attributes['TYPE'], 'INT') !== FALSE)
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{
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unset($attributes['CONSTRAINT']);
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}
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switch (strtoupper($attributes['TYPE']))
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{
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case 'MEDIUMINT':
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$attributes['TYPE'] = 'INTEGER';
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$attributes['UNSIGNED'] = FALSE;
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return;
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case 'INTEGER':
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$attributes['TYPE'] = 'INT';
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return;
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default: return;
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}
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}
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// --------------------------------------------------------------------
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/**
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* Field attribute AUTO_INCREMENT
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*
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* @param array &$attributes
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* @param array &$field
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* @return void
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*/
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protected function _attr_auto_increment(&$attributes, &$field)
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{
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if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
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{
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$field['auto_increment'] = ' IDENTITY(1,1)';
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}
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}
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}
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