planner: make the logical op's shallow ref generator.

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664

Problem Summary:

What changed and how does it work?

cascades infra will require some operator's clone in XForm action, while sometimes we can only get a shallow copy of an operator according to the ref is a pointer or structure. By XXXshallowRef functionality, we can safely shallow copy a map/slice/or embedded ones before modify them in the new clonedOp.

clonedJoin := *p
clonedJoin._EqualConditionsShallowRef()
// shallow cp it before your use it, otherwise your appending stuff will modify the original slice in other operator.
// since it's shallowed one, once you want to modify them, your should substitute them basic element totally rather
// modify in-place like:
clonedJoin._EqualConditionsShallowRef()[0] = newFunction(xxx)

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]

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[codecov]

Codecov Report

Attention: Patch coverage is 52.75591% with 60 lines in your changes missing coverage. Please review.

Project coverage is 74.4907%. Comparing base (dfc0035) to head (8408799).
Report is 4 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59124        +/-   ##
================================================
+ Coverage   73.0571%   74.4907%   +1.4336%     
================================================
  Files          1684       1689         +5     
  Lines        466439     477725     +11286     
================================================
+ Hits         340767     355861     +15094     
+ Misses       104729     100469      -4260     
- Partials      20943      21395       +452     

Flag	Coverage Δ
integration	44.1552% <0.0000%> (?)
unit	73.3049% <52.7559%> (+1.0590%)	⬆️

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Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.3606% <ø> (+0.0546%)	⬆️

[AilinKid]

/retest-required

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, qw4990

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-23 03:29:18.781738321 +0000 UTC m=+324286.112657722: ☑️ agreed by qw4990.
• 2025-01-23 04:47:22.432989114 +0000 UTC m=+328969.763908517: ☑️ agreed by hawkingrei.

[hawkingrei]

/ok-to-test

[AilinKid]

/test build

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