On Thu, 2009-07-30 at 21:45 -0400, Andrew Dunstan wrote: > > For instance, what would it mean if y > > SELECT foo(a) FROM mytable; > > > > Where foo() mutated it's IN argument? Would that really be an UPDATE? > > > No, surely the mutated value will only be visible within the scope of > the function, i.e. it will be a purely local copy that gets altered.
Oh, I misunderstood the example here: http://archives.postgresql.org/pgsql-hackers/2009-07/msg01931.php I thought he was saying that the PERFORM in test1() _should_ have mutated "a", when in fact, he was trying to demonstrate that it does not (with his patch or without). Regards, Jeff Davis -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
