Re: inet type/merge joins

Alex Pilosov <alex(at)pilosoft(dot)com> writes:
>> At some point it'd be nice to use type-specific hash functions for
>> hashjoin --- we support 'em for hash indexes, and I don't see why the
>> join mechanism should not use the same functions. With that, it'd be
>> possible to overcome this problem by making a hash function that has
>> the same blind spots as the comparison function ...

> I guess the idea is to add a hash function to a catalog of a type
> definition is a good idea?

Either that, or replace the oprcanhash boolean field of pg_operator
by an OID field that links to the appropriate hash function. Not sure
offhand which is better.

regards, tom lane