zOs/TX/WK993

          * load jobs with foreign keys / unique indexes
credb trg 1
+ ok creDb DSN.TX.GENF(WK993t1) ::f
manual wk993unl   ==> unload files erstellen
manual wk993loc   ==> load child table ==> v10 brauch mapddn, v9 nicht
delete from A540769.twk993Chi;
delete from A540769.twk993Par;
manual wk993loc   ==> load child table with no parents