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Posted to dev@calcite.apache.org by Stamatis Zampetakis <za...@gmail.com> on 2019/01/03 16:08:46 UTC

[Review request] (CALCITE-2554) Enrich enumerable join operators with order preserving information

Hello,

Can somebody have a look in the PR.

Enriching join operators with RelCollation information can have a big
impact in performance of some queries since it allows dropping redundant
sort operators which are in general costly to evaluate.

Thanks in advance,
Stamatis

JIRA: https://issues.apache.org/jira/browse/CALCITE-2554
PR: https://github.com/apache/calcite/pull/866

Re: [Review request] (CALCITE-2554) Enrich enumerable join operators with order preserving information

Posted by Michael Mior <mm...@apache.org>.

Stamatis,

I left a comment on the PR. Overall it looks great to me although I wonder
if we want to resolve CALCITE-2582 first to avoid disabling the subquery
tests. Thanks!


--
Michael Mior
mmior@apache.org

Le jeu. 3 janv. 2019 à 11:09, Stamatis Zampetakis <za...@gmail.com> a
écrit :

> Hello,
>
> Can somebody have a look in the PR.
>
> Enriching join operators with RelCollation information can have a big
> impact in performance of some queries since it allows dropping redundant
> sort operators which are in general costly to evaluate.
>
> Thanks in advance,
> Stamatis
>
> JIRA: https://issues.apache.org/jira/browse/CALCITE-2554
> PR: https://github.com/apache/calcite/pull/866
>