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* INSERT INTO...RETURNING vs SELECT
@ 2010-04-04 22:12 Cliff Wells <cliff@develix.com>
0 siblings, 0 replies; 4+ messages in thread
From: Cliff Wells @ 2010-04-04 22:12 UTC (permalink / raw)
To: pgsql-sql
I was doing some experimenting and was wondering why the following does
not work:
CREATE TABLE accounts (
id SERIAL PRIMARY KEY NOT NULL,
accounts_id INTEGER REFERENCES accounts,
name TEXT
);
INSERT INTO accounts (accounts_id, name) VALUES (
(INSERT INTO accounts (accounts_id, name) VALUES (NULL, 'test 1') RETURNING id), 'test 2');
ERROR: syntax error at or near "INTO"
Of course, the following works fine:
INSERT INTO accounts (accounts_id, name) VALUES (NULL, 'test 1');
INSERT INTO accounts (accounts_id, name) VALUES (
(SELECT id FROM accounts WHERE name='test 1'), 'test 2');
As far as I can see, INSERT INTO...RETURNING is semantically equivalent
to SELECT...FROM with a side-effect, so it seems this construct should
work. Can someone shed some light?
Regards,
Cliff
^ permalink raw reply [nested|flat] 4+ messages in thread
* INSERT INTO...RETURNING vs SELECT
@ 2010-04-05 04:48 Cliff Wells <cliff@develix.com>
2010-04-05 07:10 ` Re: INSERT INTO...RETURNING vs SELECT Andreas Kretschmer <akretschmer@spamfence.net>
0 siblings, 1 reply; 4+ messages in thread
From: Cliff Wells @ 2010-04-05 04:48 UTC (permalink / raw)
To: pgsql-sql
I was doing some experimenting and was wondering why the following does
not work:
CREATE TABLE accounts (
id SERIAL PRIMARY KEY NOT NULL,
accounts_id INTEGER REFERENCES accounts,
name TEXT
);
INSERT INTO accounts (accounts_id, name) VALUES (
(INSERT INTO accounts (accounts_id, name) VALUES (NULL, 'test 1') RETURNING id), 'test 2');
ERROR: syntax error at or near "INTO"
Of course, the following works fine:
INSERT INTO accounts (accounts_id, name) VALUES (NULL, 'test 1');
INSERT INTO accounts (accounts_id, name) VALUES (
(SELECT id FROM accounts WHERE name='test 1'), 'test 2');
As far as I can see, INSERT INTO...RETURNING is semantically equivalent
to SELECT...FROM with a side-effect, so it seems this construct should
work. Can someone shed some light?
Regards,
Cliff
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: INSERT INTO...RETURNING vs SELECT
2010-04-05 04:48 INSERT INTO...RETURNING vs SELECT Cliff Wells <cliff@develix.com>
@ 2010-04-05 07:10 ` Andreas Kretschmer <akretschmer@spamfence.net>
2010-04-05 15:40 ` Re: INSERT INTO...RETURNING vs SELECT Cliff Wells <cliff@develix.com>
0 siblings, 1 reply; 4+ messages in thread
From: Andreas Kretschmer @ 2010-04-05 07:10 UTC (permalink / raw)
To: pgsql-sql
Cliff Wells <cliff@develix.com> wrote:
> As far as I can see, INSERT INTO...RETURNING is semantically equivalent
> to SELECT...FROM with a side-effect, so it seems this construct should
> work. Can someone shed some light?
Well, at the moment you can't reuse the RETURNING-values, you have to
wait for 9.1, writeable CTE.
Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect. (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly." (unknown)
Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: INSERT INTO...RETURNING vs SELECT
2010-04-05 04:48 INSERT INTO...RETURNING vs SELECT Cliff Wells <cliff@develix.com>
2010-04-05 07:10 ` Re: INSERT INTO...RETURNING vs SELECT Andreas Kretschmer <akretschmer@spamfence.net>
@ 2010-04-05 15:40 ` Cliff Wells <cliff@develix.com>
0 siblings, 0 replies; 4+ messages in thread
From: Cliff Wells @ 2010-04-05 15:40 UTC (permalink / raw)
To: pgsql-sql
On Mon, 2010-04-05 at 09:10 +0200, Andreas Kretschmer wrote:
> Cliff Wells <cliff@develix.com> wrote:
>
> > As far as I can see, INSERT INTO...RETURNING is semantically equivalent
> > to SELECT...FROM with a side-effect, so it seems this construct should
> > work. Can someone shed some light?
>
> Well, at the moment you can't reuse the RETURNING-values, you have to
> wait for 9.1, writeable CTE.
Thanks, I just wanted to make sure I wasn't misunderstanding something.
Regards,
Cliff
^ permalink raw reply [nested|flat] 4+ messages in thread
end of thread, other threads:[~2010-04-05 15:40 UTC | newest]
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2010-04-04 22:12 INSERT INTO...RETURNING vs SELECT Cliff Wells <cliff@develix.com>
2010-04-05 04:48 INSERT INTO...RETURNING vs SELECT Cliff Wells <cliff@develix.com>
2010-04-05 07:10 ` Andreas Kretschmer <akretschmer@spamfence.net>
2010-04-05 15:40 ` Cliff Wells <cliff@develix.com>
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