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/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License ( MIT )
*
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* Copyright ( c ) 2014 - 2019 , British Columbia Institute of Technology
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*
* Permission is hereby granted , free of charge , to any person obtaining a copy
* of this software and associated documentation files ( the " Software " ), to deal
* in the Software without restriction , including without limitation the rights
* to use , copy , modify , merge , publish , distribute , sublicense , and / or sell
* copies of the Software , and to permit persons to whom the Software is
* furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM , DAMAGES OR OTHER
* LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING FROM ,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE .
*
* @ package CodeIgniter
* @ author EllisLab Dev Team
* @ 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 / )
* @ license https :// opensource . org / licenses / MIT MIT License
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* @ link https :// codeigniter . com
* @ since Version 3.0 . 0
* @ filesource
*/
defined ( 'BASEPATH' ) OR exit ( 'No direct script access allowed' );
/**
* PDO SQLSRV Forge Class
*
* @ category Database
* @ author EllisLab Dev Team
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* @ link https :// codeigniter . com / userguide3 / database /
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*/
class CI_DB_pdo_sqlsrv_forge extends CI_DB_pdo_forge {
/**
* CREATE TABLE IF statement
*
* @ var string
*/
protected $_create_table_if = " IF NOT EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1) \n CREATE TABLE " ;
/**
* DROP TABLE IF statement
*
* @ var string
*/
protected $_drop_table_if = " IF EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1) \n DROP TABLE " ;
/**
* UNSIGNED support
*
* @ var array
*/
protected $_unsigned = array (
'TINYINT' => 'SMALLINT' ,
'SMALLINT' => 'INT' ,
'INT' => 'BIGINT' ,
'REAL' => 'FLOAT'
);
// --------------------------------------------------------------------
/**
* 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 )
{
if ( in_array ( $alter_type , array ( 'ADD' , 'DROP' ), TRUE ))
{
return parent :: _alter_table ( $alter_type , $table , $field );
}
$sql = 'ALTER TABLE ' . $this -> db -> escape_identifiers ( $table ) . ' ALTER COLUMN ' ;
$sqls = array ();
for ( $i = 0 , $c = count ( $field ); $i < $c ; $i ++ )
{
$sqls [] = $sql . $this -> _process_column ( $field [ $i ]);
}
return $sqls ;
}
// --------------------------------------------------------------------
/**
* Field attribute TYPE
*
* Performs a data type mapping between different databases .
*
* @ param array & $attributes
* @ return void
*/
protected function _attr_type ( & $attributes )
{
if ( isset ( $attributes [ 'CONSTRAINT' ]) && strpos ( $attributes [ 'TYPE' ], 'INT' ) !== FALSE )
{
unset ( $attributes [ 'CONSTRAINT' ]);
}
switch ( strtoupper ( $attributes [ 'TYPE' ]))
{
case 'MEDIUMINT' :
$attributes [ 'TYPE' ] = 'INTEGER' ;
$attributes [ 'UNSIGNED' ] = FALSE ;
return ;
case 'INTEGER' :
$attributes [ 'TYPE' ] = 'INT' ;
return ;
default : return ;
}
}
// --------------------------------------------------------------------
/**
* 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' ] = ' IDENTITY(1,1)' ;
}
}
}