On 2010-11-14 8:01 PM +0200, I wrote:
> In my opinion, all of these should have the same effect: DELETE all rows
> from "foo".
Since the example wasn't entirely clear on this one: in my opinion the
DML should also only be executed once. So:
WITH t AS (INSERT INTO foo VALUES (0) RETURNING *)
SELECT 1 FROM t t1, t t2;
would only insert one row in any case.
Regards,
Marko Tiikkaja