This keeps biting me. In a trigger function for INSERT OR UPDATE if you try
IF TG_OP = 'UPDATE' AND OLD.foo = 'bar' THEN
...
it will blow up on inserts because there is no OLD. I always expect
this to short circuit and am always disappointed. Easy fix, of
course...
IF TG_OP = 'UPDATE' THEN
IF OLD.foo = 'bar' THEN
...
In case this was what the OP was asking about in particular, it still
happens to me in 8.2
- Ian
On 5/17/07, Tom Lane <[EMAIL PROTECTED]> wrote:
Richard Broersma Jr <[EMAIL PROTECTED]> writes:
> Does anyone know if logic operations in plpgsql are short circuited in 8.2?
They are often optimized, but if you expect "short circuiting" following
exactly the rules of, say, C, you are likely to be disappointed. See
the manual:
http://www.postgresql.org/docs/8.2/static/sql-expressions.html#SYNTAX-EXPRESS-EVAL
regards, tom lane
---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PROTECTED] so that your
message can get through to the mailing list cleanly
---------------------------(end of broadcast)---------------------------
TIP 3: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faq
