Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> I wonder about adding a syscache callback so that when an item in
> pg_partitioned_table is invalidated, the relcache entry for partrelid
> entry in pg_class is invalidated also. I can't find any precedent for
> anything similar, though, and there doesn't seem to be any convenient
> place to do it, either.
In principle you could do it by adding logic to CacheInvalidateHeapTuple
in inval.c, similar to the existing logic for pg_class, pg_attribute
and pg_index entries. Not sure it's worthwhile though. That's very
ancient code; of late our practice has been to insist that the code
modifying other catalogs that feed into relcache entries should issue
a relcache inval explicitly. If there's a reason why it's not convenient
to do that, then maybe making CacheInvalidateHeapTuple do it is a
good way.
regards, tom lane