Ok :) Then I found the solution in this partical case:
CREATE RULE test1_on_insert AS ON INSERT TO test1 DO INSERT INTO
test_log1 (qid) VALUES ( (SELECT lastval()) );
With this rule all inserts are working as expected :)
Thank you for you advise :)
Sarunas
Michael Fuhr wrote:
On Wed, Nov 16, 2005 at 10:31:10AM +0200, Sarunas Krisciukaitis wrote:
I understand that RULES are like macros.
Strangest thing here is that INSERT to test1 will touch only one
sequence: test1_id_seq.
And it increments test1_id_seq twice during insert with RULE.
Yes, that's a well-known effect of rewriting a query that includes
a call to nextval(). NEW.id in the rule doesn't refer to the value
that's inserted, but rather to the expression that's evaluated to
get that value. Since you didn't provide a value for id it gets
the default: nextval('test1_id_seq'). That expression is used in
both inserts, so the sequence gets incremented twice. See the
archives for numerous past discussions of this behavior.
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