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Re: [PATCH] Negative Transition Aggregate Functions (WIP) - Mailing list pgsql-hackers

From Tom Lane
Subject Re: [PATCH] Negative Transition Aggregate Functions (WIP)
Date
Msg-id 9871.1387064393@sss.pgh.pa.us
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In response to [PATCH] Negative Transition Aggregate Functions (WIP)  (David Rowley <dgrowleyml@gmail.com>)
Responses Re: [PATCH] Negative Transition Aggregate Functions (WIP)
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David Rowley <dgrowleyml@gmail.com> writes:
> The attached patch is not quite finished yet, I've not yet fully covered
> SUM and AVG for all types.

I think you *can't* cover them for the float types; roundoff error
would mean you don't get the same answers as before.
        regards, tom lane

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