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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Eav\Model\Mview;
use Magento\Framework\App\ResourceConnection;
use Magento\Framework\DB\Sql\Expression;
use Magento\Framework\Mview\View\ChangeLogBatchWalkerInterface;
use Magento\Framework\Mview\View\ChangelogInterface;
/**
* Class BatchIterator
*/
class ChangeLogBatchWalker implements ChangeLogBatchWalkerInterface
{
private const GROUP_CONCAT_MAX_VARIABLE = 'group_concat_max_len';
/** ID is defined as small int. Default size of it is 5 */
private const DEFAULT_ID_SIZE = 5;
/**
* @var ResourceConnection
*/
private $resourceConnection;
/**
* @var array
*/
private $entityTypeCodes;
/**
* @param ResourceConnection $resourceConnection
* @param array $entityTypeCodes
*/
public function __construct(
ResourceConnection $resourceConnection,
array $entityTypeCodes = []
) {
$this->resourceConnection = $resourceConnection;
$this->entityTypeCodes = $entityTypeCodes;
}
/**
* Calculate EAV attributes size
*
* @param ChangelogInterface $changelog
* @return int
* @throws \Exception
*/
private function calculateEavAttributeSize(ChangelogInterface $changelog): int
{
$connection = $this->resourceConnection->getConnection();
if (!isset($this->entityTypeCodes[$changelog->getViewId()])) {
throw new \Exception('Entity type for view was not defined');
}
$select = $connection->select();
$select->from(
$this->resourceConnection->getTableName('eav_attribute'),
new Expression('COUNT(*)')
)
->joinInner(
['type' => $connection->getTableName('eav_entity_type')],
'type.entity_type_id=eav_attribute.entity_type_id'
)
->where('type.entity_type_code = ?', $this->entityTypeCodes[$changelog->getViewId()]);
return (int) $connection->fetchOne($select);
}
/**
* Prepare group max concat
*
* @param int $numberOfAttributes
* @return void
* @throws \Exception
*/
private function setGroupConcatMax(int $numberOfAttributes): void
{
$connection = $this->resourceConnection->getConnection();
$connection->query(sprintf(
'SET SESSION %s=%s',
self::GROUP_CONCAT_MAX_VARIABLE,
$numberOfAttributes * (self::DEFAULT_ID_SIZE + 1)
));
}
/**
* @inheritdoc
* @throws \Exception
*/
public function walk(ChangelogInterface $changelog, int $fromVersionId, int $toVersion, int $batchSize)
{
$connection = $this->resourceConnection->getConnection();
$numberOfAttributes = $this->calculateEavAttributeSize($changelog);
$this->setGroupConcatMax($numberOfAttributes);
$select = $connection->select()->distinct(true)
->where(
'version_id > ?',
(int) $fromVersionId
)
->where(
'version_id <= ?',
$toVersion
)
->group([$changelog->getColumnName(), 'store_id'])
->limit($batchSize);
$columns = [
$changelog->getColumnName(),
'attribute_ids' => new Expression('GROUP_CONCAT(attribute_id)'),
'store_id'
];
$select->from($changelog->getName(), $columns);
return $connection->fetchAll($select);
}
}