planner: add group/memo/groupExpression.

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664

Problem Summary:

What changed and how does it work?

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

[tiprow]

Hi @AilinKid. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 25.64103% with 116 lines in your changes missing coverage. Please review.

Project coverage is 56.3018%. Comparing base (1dc3851) to head (2f4f8e9).
Report is 6 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #55825         +/-   ##
=================================================
- Coverage   72.9018%   56.3018%   -16.6001%     
=================================================
  Files          1604       1733        +129     
  Lines        446805     625060     +178255     
=================================================
+ Hits         325729     351920      +26191     
- Misses       101024     249472     +148448     
- Partials      20052      23668       +3616     

Flag	Coverage Δ
integration	37.5259% <0.0000%> (?)
unit	72.1794% <25.6410%> (+0.1723%)	⬆️

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

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	53.2167% <ø> (+7.5129%)	⬆️

[elsa0520]

Should we unit test the equal function of group and group expr rather than only test the equal of sum64 ?

[AilinKid]

i think we do?

require.False(t, a.Equals(b))
require.False(t, a.Equals(&b))

[AilinKid]

/test unit-test

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In response to this:

/test unit-test

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[elsa0520]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: elsa0520, winoros

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-13 05:07:58.69969031 +0000 UTC m=+592148.440114249: ☑️ agreed by elsa0520.
• 2024-09-13 09:21:30.689880159 +0000 UTC m=+607360.430304098: ☑️ agreed by winoros.