phpOMS/DataStorage/Database/Query/Grammar/MicrosoftGrammar.php
2018-02-15 20:27:58 +01:00

52 lines
1.2 KiB
PHP

<?php
/**
* Orange Management
*
* PHP Version 7.1
*
* @package TBD
* @copyright Dennis Eichhorn
* @license OMS License 1.0
* @version 1.0.0
* @link http://website.orange-management.de
*/
declare(strict_types=1);
namespace phpOMS\DataStorage\Database\Query\Grammar;
use phpOMS\DataStorage\Database\Query\Builder;
/**
* Grammar class.
*
* @package Framework
* @license OMS License 1.0
* @link http://website.orange-management.de
* @since 1.0.0
*/
class MicrosoftGrammar extends Grammar
{
/**
* Compile random.
*
* @param Builder $query Builder
* @param array $columns Columns
*
* @return string
*
* @since 1.0.0
*/
protected function compileRandom(Builder $query, array $columns) : string
{
$expression = $this->expressionizeTableColumn($columns, $query->getPrefix());
if ($expression === '') {
$expression = '*';
}
$query->limit = $query->limit ?? 1;
return 'SELECT TOP ' . $query->limit . ' ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY IDX FETCH FIRST ' . $query->limit . ' ROWS ONLY';
}
}