> >  OO in PostgreSQL means that you can create own operators, datetypes, 
> functions...
> 
> Last I checked, all of these things were part of the SQL spec.   I believe our 
> only "OO" functionality is inheritance ... which I have yet to find a use 
> for.

Can you tell me what the SQL99 spec says regarding creation of
operators? I couldn't find them.
--
Tatsuo Ishii



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