Excerpts from Heikki Linnakangas's message of jue ene 19 07:25:36 -0300 2012:

> Frankly that's such a rare corner case that I'm not very enthusiastic 
> about fixing it. One idea would be to look up the type's b-tree sort 
> operators, and pick the equality operator from there. But point datatype 
> doesn't have b-tree sort operators, either, so it wouldn't help in this 
> case.

It doesn't have a hash opclass either, which could be used as a fallback
in case there's no btree.  Point cannot obviously have a btree opclass
(no inequalities), but a hash one seems possible.

I think the use case of IS NOT DISTINCT FROM for rowtypes in triggers is
a valid one.

-- 
Álvaro Herrera <alvhe...@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
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