Re: Join Problem in Postgres 7.0.2

pgsql-bugs@postgresql.org writes:
> I get into a situation, in which I think it is a bug in either psql or
> the database.  I have experienced that when I ran two queries in psql,
> which are equivalent, I received two different results

Does EXPLAIN show that the failing query has a Merge Join directly
underneath another Merge Join?  If so, this is a known bug.  It's
fixed in 7.0.3.

            regards, tom lane