> Do you think it would be better to do > 1) a hash lookup by function oid to a linked list of different compiled > versions (for each set of argument/return types) > -or- > 2) create hash key using a new structure that includes function oid, > return type, and argument types, and use that for direct lookup.
The latter. By the time you pay the price of a hash lookup, a slightly longer key is nearly free. (Maybe entirely free, since it might produce better-distributed hash values.) dynahash only supports fixed-length keys, so don't forget to zero out unused positions in the argument type vector. BTW, I can't see any need to include the return type in the hash key --- wouldn't it be predetermined given the argument types? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])