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

From Greg Stark
Subject Re: [PATCH] Negative Transition Aggregate Functions (WIP)
Date
Msg-id CAM-w4HN6_r+e8NPTQQ_UAzY4hiEyUDNNb3kUGy8Bz8wVz0WP4g@mail.gmail.com
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In response to [PATCH] Negative Transition Aggregate Functions (WIP)  (David Rowley <dgrowleyml@gmail.com>)
List pgsql-hackers
On Wed, Mar 5, 2014 at 10:49 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> [ shrug... ]  They can see whether the Window plan node is where the time
> is going.  It's not apparent to me that the extra numbers you propose to
> report will edify anybody.

Perhaps just saying "Incremental Window Function" versus "Iterated
Window Function" or something like that be sufficient? At least that
way query tuning quidelines have a keyword they can say to watch out
for. And someone trying to figure out *why* the time is being spent in
this node has something they might notice a correlation with.


-- 
greg



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