Submitted by: @samofatov

Assigned to: @samofatov

Is related to QA439

create table test (id numeric, f1 varchar(20));
create table test1(id1 numeric, ff computed((select f1 from test where id=id1)));
commit;

alter table test1 alter ff computed(cast(null as varchar(20)));
drop table test;
commit;

Cannot commit transaction:
This operation is not defined for system tables.
unsuccessful metadata update.
cannot delete.
COLUMN http://TEST.ID.
there are 1 dependencies.

The similar sequence where altered procedure is the dependent works as expected.

Commits: d6f61ee 5b34865