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planner: fix wrong behavior for = all() (#52801) #53257

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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.

None

@ti-chi-bot ti-chi-bot added release-note-none Denotes a PR that doesn't merit a release note. sig/planner SIG: Planner size/M Denotes a PR that changes 30-99 lines, ignoring generated files. type/cherry-pick-for-release-7.5 This PR is cherry-picked to release-7.5 from a source PR. 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
Signed-off-by: Weizhen Wang <[email protected]>
@ti-chi-bot ti-chi-bot bot added approved needs-1-more-lgtm Indicates a PR needs 1 more LGTM. labels May 14, 2024
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ti-chi-bot bot commented May 14, 2024

[APPROVALNOTIFIER] This PR is APPROVED

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

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@ti-chi-bot ti-chi-bot bot added lgtm and removed needs-1-more-lgtm Indicates a PR needs 1 more LGTM. labels May 14, 2024
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ti-chi-bot bot commented May 14, 2024

[LGTM Timeline notifier]

Timeline:

  • 2024-05-14 08:49:17.949038783 +0000 UTC m=+1556711.706174357: ☑️ agreed by hawkingrei.
  • 2024-05-14 08:52:11.783589611 +0000 UTC m=+1556885.540725177: ☑️ agreed by winoros.

@ti-chi-bot ti-chi-bot bot merged commit 1f29133 into pingcap:release-7.5 May 14, 2024
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codecov bot commented May 14, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (release-7.5@317892c). Click here to learn what that means.

Additional details and impacted files
@@               Coverage Diff                @@
##             release-7.5     #53257   +/-   ##
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  Branches               ?          0           
================================================
  Hits                   ?     295027           
  Misses                 ?      94906           
  Partials               ?      19867           
Flag Coverage Δ
unit 71.9929% <100.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components Coverage Δ
dumpling 53.9913% <0.0000%> (?)
parser ∅ <0.0000%> (?)
br 53.4754% <0.0000%> (?)

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3 participants