Yes I am using that option for one of my POstgres 9.1 database and it works well. But its still an issue with Foreign keys, which you need to drop and recreate . Also I use Slony for replication and it uses the primary key to check repl. So I don't want that to be interrupted by dropping PK and recreating PK. Thanks RV -- View this message in context: http://postgresql.1045698.n5.nabble.com/Primary-key-vs-unique-index-tp3883778p5715729.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general