Re: Re: Reusing abbreviated keys during second pass of ordered [set] aggregates

From: Peter Geoghegan <pg(at)heroku(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: Reusing abbreviated keys during second pass of ordered [set] aggregates
Date: 2015-12-16 20:04:06
Message-ID: CAM3SWZR-S00-26fJ+qS7sMCgm6DJTHQ9ecYYzRHEgB5vhQjjAA@mail.gmail.com
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On Wed, Dec 16, 2015 at 9:36 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> That isn't what is intended. "void" is the state that macros like
>> index_getattr() leave NULL leading attributes (that go in the
>> SortTuple.datum1 field) in.
>
> What kind of state is that? Can't we define this in terms of what it
> is rather than how it gets that way?

It's zeroed.

I guess we can update everything, including existing comments, to reflect that.

--
Peter Geoghegan

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