[-9205]: System error: AK Catalog information not found / CONSTRAINT

Hello all,

We get the following error (in MaxDB Version 7.7.06.09):

    [-9205]: System error: AK Catalog information not found:00000000000037BD000A0011

... when reading the constraint definitions for a specific table like this:

     select * from constraints where tablename='TABNAME'

This error happens since we made some meta data changes as follows:

   rename column TABNAME.A to B

   alter table TABNAME drop B

   (also some other columns were added and some removed from table TABNAME)

I guess that this error happens because the statement "alter table TABNAME drop B" did not properly drop a constraint definition that should be removed because column 'B' was part of the constraint definition. It seems that the check for depending constraint definitions that usually removes these when a column is removed contained in the constraint definition, does not apply in some specific cases, probably because of a specific rename/add/remove-sequence.

I guess a workaround is to remove all depending constraint definitions manually, BEFORE the column is removed.

Unfortunately it seems impossible to do so afterwards.

Thanks for any comment on this.

Gabriel