Am Donnerstag, 13. Juli 2006 16:40 schrieb Chris Hoover: > On this table, I have created a unique index on payer_trn03, payer_trn04, > and expire_timestamp. However, since the expire_timestamp is normally > null, the unique index does not appear to be working. I have been able to > enter two identical rows into this table. This behavior is correct according to the SQL standard, as two null values are not considered equal. -- Peter Eisentraut http://developer.postgresql.org/~petere/
