| From: | Greg Stark <stark(at)mit(dot)edu> |
|---|---|
| To: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Erik Rijkers <er(at)xs4all(dot)nl>, Emanuel Calvo <3manuek(at)esdebian(dot)org>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Nicolas Barbier <nicolas(dot)barbier(at)gmail(dot)com>, Claudio Freire <klaussfreire(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: BRIN indexes - TRAP: BadArgument |
| Date: | 2014-11-10 00:09:16 |
| Message-ID: | CAM-w4HNc6XeCFOxz_6fnDUt-hbEPOeN0sZrYnAunHeozUhV2uw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Nov 9, 2014 at 5:57 PM, Greg Stark <stark(at)mit(dot)edu> wrote:
> 2) The mention about additional opclass operators and to number them
> from 11 up is fine -- but there's no explanation of how to decide what
> operators need to be explicitly added like that. Specifically I gather
> from reading minmax that = is handled internally by Brin and you only
> need to add any other operators aside from = ? Is that right?
I see I totally misunderstood the use of the opclass procedure
functions. I think I understand now but just to be sure -- If I can
only handle BTEqualStrategyNumber keys then is it adequate to just
define the opclass containing only the equality operator?
Somehow I got confused between the amprocs that minmax uses to
implement the consistency function and the amops that the brin index
supports.
--
greg
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