similar topic is in NOVICE mailing list: http://archives.postgresql.org/pgsql-novice/2012-02/msg00034.php
e.g. You can use BEGIN... EXCEPTION.... END, good example of such approach is there: http://www.postgresql.org/docs/9.1/static/plpgsql-control-structures.html#PLPGSQL-UPSERT-EXAMPLE;
Regards,
Bartek
2012/2/15 Chris Angelico <rosuav@xxxxxxxxx>
Periodically I find myself wanting to insert into some table,
specifying the primary key column(s), but to simply ignore the request
if it's already there. Currently I have two options:
1) Do the insert as normal, but suppress errors.
SAVEPOINT foo;
INSERT INTO table (col1,col2,col3) VALUES (val1,val2,val3);
(if error) ROLLBACK TO SAVEPOINT foo;
2) Use INSERT... SELECT:
INSERT INTO table (col1,col2,col3) SELECT val1,val2,val3 WHERE NOT
EXISTS (SELECT * FROM table WHERE col1=val1 AND col2=val2)
The former makes unnecessary log entries, the latter feels clunky. Is
there some better way?
All tips appreciated!
Chris Angelico
--
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general
