Re: [PATCH] Negative Transition Aggregate Functions (WIP)

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От Florian Pflug
Тема Re: [PATCH] Negative Transition Aggregate Functions (WIP)
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Msg-id 382F1426-1934-488C-B765-9E6C74239521@phlo.org
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Ответ на Re: [PATCH] Negative Transition Aggregate Functions (WIP)  (Dean Rasheed <dean.a.rasheed@gmail.com>)
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>> ), which seem reasonable. But
> then I started testing performance, and I found cases where the
> improvement is not nearly what I expected.
> 
> The example cited at the start of this thread is indeed orders of
> magnitude faster than HEAD:
> 
> SELECT SUM(n::int) OVER (ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING)
> F
> 
> 
> 
> 
> 
> 
> I'm not sure how much additional work is required to sort this out,
> but to me it looks more realistic to target 9.5 than 9.4, so at this
> point I tend to think that the patch ought to be marked as returned
> with feedback.
> 
> Thoughts?
> 
> Regards,
> Dean



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