* lengthen a column with a constraint
* no drop|, but drop constraint, alter, add constraint, check, reo
* add constraint ==> checkPending falls table nichtLeer
creDb trg 1
+ ok creDb A540769.TX.GENF(WK966t1) ::f
creDb src 2
+ ok creDb A540769.TX.GENF(WK966s2) ::f
* dbx c a966a, i, ana, run ==> check no drop but check, reo