Scott Marlowe <smarlowe(at)g2switchworks(dot)com> writes:
> Umm, I tried it and it worked. Sure you got the right relid?
I think the relation cache will probably not notice a manual update on
pg_index. So whether it "works" or not would depend on a lot of
extraneous factors like whether the relation cache entry was already
built for the target table and whether you did something else that would
force a cache rebuild.
In any case, the whole idea is so fraught with pitfalls that I couldn't
recommend it ...
regards, tom lane