Hi, 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 <ros...@gmail.com> > 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@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general >
