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https://issues.apache.org/jira/browse/CALCITE-2384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16527797#comment-16527797
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Zoltan Haindrich commented on CALCITE-2384:
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thank you [~michaelmior] for bisecting this; I was not able to reproduce on my
system - but when I've validated it using different machines it eventually
showed up :)
I see what "new weight" causes the perf degradation; and I will probably
provide a small fix which will restore the old behaviour for
{{RelMdPredicates}} - so that the perf regression can be gone..
I've spent spent some time understanding this combinatorical shuffler - I'm
wondering if this could be done by using predicates of RexSimplify...it seems so
> Performance issue in getPulledUpPredicates
> ------------------------------------------
>
> Key: CALCITE-2384
> URL: https://issues.apache.org/jira/browse/CALCITE-2384
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Zoltan Haindrich
> Priority: Major
>
> Performance issue in getPulledUpPredicates. It seems to have been introduced
> in the fix for CALCITE-2247, and causes Performance issue in
> getPulledUpPredicates to exceed its 20 second timeout. (See the [email
> thread|https://lists.apache.org/thread.html/afaa14a864c7027b9f1c66dddd3e5d6320799aeeec937c17d7b24531@%3Cdev.calcite.apache.org%3E]:
> [~risdenk] noticed this problem, and [~michaelmior] isolated the commit that
> caused the problem.)
> This issue has lots of history: that test was introduced to check
> CALCITE-1960 and CALCITE-2205.
> [~kgyrtkirk], Can you please take a look at this?
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