Re: pg_event_trigger_ddl_commands fails with cache lookup failed

On 2021-Feb-27, Sven Klemm wrote:

> Hello,
>
> > trg=# ALTER TABLE t ALTER COLUMN f1 DROP IDENTITY, ALTER COLUMN f1 SET
> > DATA TYPE bigint;
> > ERROR: XX000: cache lookup failed for relation 13476892
> > CONTEXT: PL/pgSQL function ddl_end() line 5 at FOR over SELECT rows
> > LOCATION: getRelationTypeDescription, objectaddress.c:4178
>
> Is this expected behaviour or something that should be fixed?
> The documentation for pg_event_trigger_ddl_commands doesnt mention
> that it could fail for certain statements.

Yeah, this is certainly a bug. The code should likely ignore the
sub-command. I'll have a look.

--
Álvaro Herrera Valdivia, Chile
"After a quick R of TFM, all I can say is HOLY CR** THAT IS COOL! PostgreSQL was
amazing when I first started using it at 7.2, and I'm continually astounded by
learning new features and techniques made available by the continuing work of
the development team."
Berend Tober, http://archives.postgresql.org/pgsql-hackers/2007-08/msg01009.php