Обсуждение: regtype sorting broken in 8.3

This used to work in 8.2:

pei=# select castsource::regtype, casttarget::regtype, castcontext from pg_cast order by 1,2;

But int 8.3 it says:

ERROR:  XX000: could not find pathkey item to sort
LOCATION:  make_sort_from_pathkeys, createplan.c:2812

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/

Peter Eisentraut <peter_e@gmx.net> writes:
> pei=# select castsource::regtype, casttarget::regtype, castcontext from pg_cast order by 1,2;
> ERROR:  XX000: could not find pathkey item to sort
> LOCATION:  make_sort_from_pathkeys, createplan.c:2812

Hmph.  When we hacked that function last week, I was kinda wondering if
it shouldn't strip RelabelType from *both* sides of the comparison.
Looks like it does need that after all.
        regards, tom lane