Hello, looks like PostgreSQL (8.0/8.1) has no support for using other-than-btree indexes for primary keys. Is there a (perhaps un(der)documented) way to specify the index type? Rationale: I'm trying to have PKs on a type that defines only the = and <> operators, and would work with a hash-based PK. I know I could work around it with a UNIQUE INDEX, but would like to avoid that for exactly the reason described in the manual: : Technically, PRIMARY KEY is merely a combination of UNIQUE and NOT : NULL, but identifying a set of columns as primary key also provides : metadata about the design of the schema, as a primary key implies : that other tables may rely on this set of columns as a unique : identifier for rows. Please cc me on replies, I have problems with the postgresql.org majordomo. -- How many Vietnam vets does it take to screw in a light bulb? You don't know, man. You don't KNOW. Cause you weren't THERE. http://bash.org/?255991