LogTable::clean

static function clean()
{
	$connection = Application::getConnection();
	$sqlHelper = $connection->getSqlHelper();

	$tableName = static::getTableName();
	$deleteBorder = $sqlHelper->addSecondsToDateTime(
		-static::TTL,
		$sqlHelper->getCurrentDateTimeFunction()
	);

	$connection->queryExecute("DELETE FROM {$tableName} WHERE TIMESTAMP_X < {$deleteBorder}");

	return __CLASS__."::clean();";
}