On 23 September 2010 00:26, Marko Tiikkaja <marko.tiikk...@cs.helsinki.fi> wrote: > On 2010-09-23 1:16 AM, Bernd Helmle wrote: >> >> INSERT INTO vfoo VALUES('helmle', 2) RETURNING *; >> text | id >> --------+---- >> helmle | 2 >> (1 row) >> >> SELECT * FROM vfoo; >> text | id >> -------+---- >> bernd | 2 >> (1 row) >> >> This is solvable by a properly designed trigger function, but maybe we >> need >> to do something about this? > > I really don't think we should limit what people are allowed to do in the > trigger function. > > Besides, even if the RETURNING clause returned 'bernd' in the above case, I > think it would be even *more* surprising. The trigger function explicitly > returns NEW which has 'helmle' as the first field. >
Yes, I agree. To me this is the least surprising behaviour. I think a more common case would be where the trigger computed a value (such as the 'last updated' example). The executor doesn't have any kind of a handle on the row inserted by the trigger, so it has to rely on the function return value to support RETURNING. I can confirm the latest Oracle (11g R2 Enterprise Edition) does not support RETURNING INTO with INSTEAD OF triggers (although it does work with its auto-updatable views), presumably because it's triggers don't return values, but I think it would be a shame for us to not support it. Regards, Dean -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers