Thanks for the reply. I can do this at the higher level; but this antijoin
thing is a small part of a bigger project. So I want to do it internally in
one of the joins. Does anyone have experience in storing tupleslpts and
comparing them ??
Gregory Stark wrote:
>
> "Suresh_" <[EMAIL PROTECTED
"Suresh_" <[EMAIL PROTECTED]> writes:
> I want to add an antijoin operator to PostgreSql.
I think you can already do what you want like this:
SELECT *
FROM A FULL OUTER JOIN B ON (x=y)
WHERE x IS NULL
OR y IS NULL
So for example:
postgres=# select * from a;
i
---
1
2
(2 rows)
pos
Suresh_ wrote:
> I want to add an antijoin operator to PostgreSql. Basically I want to store
> the result (tupletableslot) of one join and then compare it with
> another..How do I store these results and how do I compare them ?
I would suggest implementing it at a higher level, rewriting a query
