| From: | David Rowley <dgrowleyml(at)gmail(dot)com> |
|---|---|
| To: | Josh Berkus <josh(at)agliodbs(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Greg Stark <stark(at)mit(dot)edu>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [PATCH] Negative Transition Aggregate Functions (WIP) |
| Date: | 2014-01-02 12:05:34 |
| Message-ID: | CAApHDvrabeMqgEa1u-dx0yv04SftH_fQBB+N6qvhDLm2KiJA0Q@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Dec 27, 2013 at 1:36 AM, David Rowley <dgrowleyml(at)gmail(dot)com> wrote:
> From what I can tell adding an inverse transition function to support AVG
> for numeric does not affect the number of trailing zeros in the results, so
> I've attached a patch which now has inverse transition functions to support
> numeric types in AVG and all of the STDDEV* aggregates.
>
here's a slightly updated patch in which I've fixed up an comment that had
become out-dated because of the patch. I also changed the wording in quite
a few of my comments and made some changes to the docs. The only other
change was an extra error check just in case window_gettupleslot was to
fail to get a tuple that should always be in the tuple store.
I'm now classing the patch is not WIP anymore. I think it's ready for the
commitfest.
Regards
David Rowley
| Attachment | Content-Type | Size |
|---|---|---|
| inverse_transition_functions_v1.8.patch.gz | application/x-gzip | 19.3 KB |
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