From: | Cliff Wells <cliff(at)develix(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | INSERT INTO...RETURNING vs SELECT |
Date: | 2010-04-04 22:12:53 |
Message-ID: | 1270419173.4749.139.camel@portable-evil |
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Lists: | 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
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