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planner: fix wrong behavior for = all() (#52801) #53255

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@ti-chi-bot ti-chi-bot commented May 14, 2024

This is an automated cherry-pick of #52801

What problem does this PR solve?

Issue Number: close #52755

Problem Summary:

What changed and how does it work?

Use max function instead of first_row function.

if the query is t.id = all (select s.id from s), it will be rewrote to
t.id = (select s.id from s having count(distinct s.id) <= 1 and [all checker]) .

If there is NULL in the s.id column, s.id should be the value that isn't null in condition t.id == s.id. So use function max to filter NULL.

Check List

Tests

  • Unit test
  • Integration test
  • Manual test (add detailed scripts or steps below)
  • No need to test
    • I checked and no code files have been changed.

Side effects

  • Performance regression: Consumes more CPU
  • Performance regression: Consumes more Memory
  • Breaking backward compatibility

Documentation

  • Affects user behaviors
  • Contains syntax changes
  • Contains variable changes
  • Contains experimental features
  • Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

planner: fix wrong behavior for = all()
修复错误的 = all() 行为

@ti-chi-bot ti-chi-bot added release-note-none sig/planner SIG: Planner size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/cherry-pick-for-release-6.5 labels May 14, 2024
@ti-chi-bot ti-chi-bot bot added size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels May 14, 2024
@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label May 14, 2024
@ti-chi-bot ti-chi-bot bot added size/S Denotes a PR that changes 10-29 lines, ignoring generated files. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. release-note and removed size/XL Denotes a PR that changes 500-999 lines, ignoring generated files. size/S Denotes a PR that changes 10-29 lines, ignoring generated files. release-note-none labels Jun 3, 2024
@ti-chi-bot ti-chi-bot bot added the lgtm label Jun 3, 2024
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ti-chi-bot bot commented Jun 3, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AilinKid, hawkingrei

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:
  • OWNERS [AilinKid,hawkingrei]

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ti-chi-bot bot commented Jun 3, 2024

[LGTM Timeline notifier]

Timeline:

  • 2024-06-03 04:02:38.669787104 +0000 UTC m=+3267512.426922677: ☑️ agreed by hawkingrei.
  • 2024-06-03 05:38:15.828167488 +0000 UTC m=+3273249.585303064: ☑️ agreed by AilinKid.

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
*
Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
*
Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
*
Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
*
Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
*
Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
@hawkingrei hawkingrei force-pushed the cherry-pick-52801-to-release-6.5 branch from aef9a68 to cb99288 Compare June 3, 2024 05:53
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codecov bot commented Jun 3, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-6.5@947bb04). Learn more about missing BASE report.

Additional details and impacted files
@@               Coverage Diff                @@
##             release-6.5     #53255   +/-   ##
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  Coverage               ?   73.6371%           
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  Files                  ?       1096           
  Lines                  ?     351680           
  Branches               ?          0           
================================================
  Hits                   ?     258967           
  Misses                 ?      76074           
  Partials               ?      16639           

@ti-chi-bot ti-chi-bot bot merged commit 66c457f into pingcap:release-6.5 Jun 3, 2024
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3 participants