Re: BUG #3718: Unexpected undefined_table error after creating/dropping tables

"Dean" <ratq92nomr@hotmail.com> writes:
> If I create a function which relies on the undefined_table exception to test
> if a table exists, it does not behave as expected.

Try issuing the DELETE via EXECUTE --- you're getting burnt by plan
caching.

But actually, do you really want something as destructive as DELETE
for an existence probe?  I'd try

    PERFORM 'bar'::text::regclass;

and see if that throws an error.  (The double cast is important here,
so that you get a runtime lookup not a compile-time one.)

            regards, tom lane