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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\DB\Select;
use Magento\Framework\DB\Select;
/**
* Class UnionRenderer
*/
class UnionRenderer implements RendererInterface
{
/**
* Render UNION section
*
* @param Select $select
* @param string $sql
* @return string
*/
public function render(Select $select, $sql = '')
{
if ($select->getPart(Select::UNION)) {
$sql = '';
$parts = count($select->getPart(Select::UNION));
foreach ($select->getPart(Select::UNION) as $cnt => $union) {
list($target, $type) = $union;
if ($target instanceof Select) {
$target = $target->assemble();
}
$sql .= $target;
if ($cnt < $parts - 1) {
$sql .= ' ' . $type . ' ';
}
}
}
return $sql;
}
}