Обсуждение: Remove unnecessary relabel stripping

On Wed, Apr 29, 2020 at 03:51:40PM +0800, Richard Guo wrote:
>Hi hackers,
>
>Per discussion in [1], we don't need to strip relabel for the expr
>explicitly before calling pull_varnos() to retrieve all mentioned
>relids. pull_varnos() would recurse into T_RelabelType nodes.
>
>Add a patch to remove that and simplify the code a bit.
>
>[1]

>https://www.postgresql.org/message-id/flat/CAMbWs48HF9f%3Dg%2BjSmmYBnWub9%2BWyg5Xh-FoqAnvqAspue5ypAw%40mail.gmail.com#b6e77e4c1ae67e2c5d97dce830b58037
>
>Thanks
>Richard

Thanks, I'll get this pushed (or something similar to this patch) soon.

FWIW it'd be better to send the patch to the original thread instead of
starting a new one.

regards



-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

On Thu, Apr 30, 2020 at 09:37:41AM +0800, Richard Guo wrote:
> On Thu, Apr 30, 2020 at 8:11 AM Tomas Vondra <tomas.vondra@2ndquadrant.com>
> wrote:>
>> FWIW it'd be better to send the patch to the original thread instead of
>> starting a new one.
>
> Ah yes, you're right. Sorry for not doing so.

FWIW, I don't find the move from Richard completely incorrect either
as the original thread discusses about a crash in incremental sorts
with sqlsmith, and here we have a patch to remove a useless operation.
Different threads pointing to different issues help to attract
sometimes a more correct audience.
--
Michael

On Thu, Apr 30, 2020 at 01:40:11PM +0900, Michael Paquier wrote:
>On Thu, Apr 30, 2020 at 09:37:41AM +0800, Richard Guo wrote:
>> On Thu, Apr 30, 2020 at 8:11 AM Tomas Vondra <tomas.vondra@2ndquadrant.com>
>> wrote:>
>>> FWIW it'd be better to send the patch to the original thread instead of
>>> starting a new one.
>>
>> Ah yes, you're right. Sorry for not doing so.
>
>FWIW, I don't find the move from Richard completely incorrect either
>as the original thread discusses about a crash in incremental sorts
>with sqlsmith, and here we have a patch to remove a useless operation.
>Different threads pointing to different issues help to attract
>sometimes a more correct audience.

Possibly. I agree it's not an entirely clear case.

Anyway, I've pushed the fix.


regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services