ALTER TABLE `invoicebase` 
ADD COLUMN `XRechnungStoredFileOid` BIGINT NULL DEFAULT NULL AFTER `StornoInvoiceBaseOid`,
ADD INDEX `FK_IN_SFILE_idx` (`XRechnungStoredFileOid` ASC) VISIBLE;
;
ALTER TABLE `invoicebase` 
ADD CONSTRAINT `FK_IN_SFILE`
  FOREIGN KEY (`XRechnungStoredFileOid`)
  REFERENCES `storedfile` (`Oid`)
  ON DELETE CASCADE
  ON UPDATE CASCADE;