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Re: using extended statistics to improve join estimates - Mailing list pgsql-hackers

From Andres Freund
Subject Re: using extended statistics to improve join estimates
Date
Msg-id 20220104235550.dgr4rz6zkjx2rykz@alap3.anarazel.de
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In response to Re: using extended statistics to improve join estimates  (Tomas Vondra <tomas.vondra@enterprisedb.com>)
Responses Re: using extended statistics to improve join estimates
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On 2022-01-01 18:21:06 +0100, Tomas Vondra wrote:
> Here's an updated patch, rebased and fixing a couple typos reported by
> Justin Pryzby directly.

FWIW, cfbot reports a few compiler warnings:

https://cirrus-ci.com/task/6067262669979648?logs=gcc_warning#L505
[18:52:15.132] time make -s -j${BUILD_JOBS} world-bin
[18:52:22.697] mcv.c: In function ‘mcv_combine_simple’:
[18:52:22.697] mcv.c:2787:7: error: ‘reverse’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
[18:52:22.697]  2787 |    if (reverse)
[18:52:22.697]       |       ^
[18:52:22.697] mcv.c:2766:27: error: ‘index’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
[18:52:22.697]  2766 |   if (mcv->items[i].isnull[index])
[18:52:22.697]       |                           ^

Greetings,

Andres Freund

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