MatchHashDedupeDataSource::getTotalCount

public function getTotalCount()
{
	$subQuery = new Main\Entity\Query(Entity\DuplicateEntityMatchHashTable::getEntity());

	$subQuery->addGroup('MATCH_HASH');
	$subQuery->registerRuntimeField('', new Main\Entity\ExpressionField('QTY', 'COUNT(*)'));
	$subQuery->addFilter('>QTY', 1);

	$typeID = $this->typeID;
	$entityTypeID = $this->getEntityTypeID();
	$scope = $this->getScope();
	$enablePermissionCheck = $this->isPermissionCheckEnabled();

	$subQuery->addFilter('=ENTITY_TYPE_ID', $entityTypeID);
	$subQuery->addFilter('=TYPE_ID', $typeID);

	if ($scope === DuplicateIndexType::DEFAULT_SCOPE)
	{
		$subQuery->addFilter('=SCOPE', DuplicateIndexType::DEFAULT_SCOPE);
	}
	else
	{
		$subQuery->addFilter('@SCOPE', array(DuplicateIndexType::DEFAULT_SCOPE, $scope));
	}

	if($enablePermissionCheck)
	{
		$permissionSql = $this->preparePermissionSql();
		if($permissionSql === false)
		{
			//Access denied;
			return 0;
		}
		if($permissionSql !== '')
		{
			$subQuery->addFilter('@ENTITY_ID', new Main\DB\SqlExpression($permissionSql));
		}
	}

	$query = new Main\Entity\Query($subQuery);
	$query->registerRuntimeField('', new Main\Entity\ExpressionField('QTY', 'COUNT(*)'));
	$query->addSelect('QTY');

	$fields = $query->exec()->fetch();
	return  is_array($fields) && isset($fields['QTY']) ? (int)$fields['QTY'] : 0;
}