>>>>> "Merlin" == "Merlin Moncure" <mmoncure(at)gmail(dot)com> writes:
Merlin> postgres=# alter table abc alter a type numeric;
Merlin> ALTER TABLE
Merlin> Time: 254.847 ms
Merlin> postgres=# EXECUTE ins_abc;
Merlin> INSERT 0 1
Merlin> Time: 0.452 ms
Merlin> postgres=# select * from abc;
Merlin> ERROR: invalid memory alloc request size 18446744073709551610
Merlin> :-)
Merlin> h/t to rhodium toad.
This is fairly obviously a simple consequence of the lack of plan
invalidation, it just happens to be more serious than most (you can,
as a normal user, break the backend in a dozen different ways, from
bad data or incomprehensible error messages up through SEGVs).
--
Andrew (irc:RhodiumToad)