planner: classify logical expand logic into a separate file for later pkg move.

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664, ref #52714

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 84.21053% with 6 lines in your changes missing coverage. Please review.

Project coverage is 56.2796%. Comparing base (1acb8f7) to head (232340e).
Report is 2 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #54869         +/-   ##
=================================================
- Coverage   72.8511%   56.2796%   -16.5715%     
=================================================
  Files          1558       1675        +117     
  Lines        438406     606224     +167818     
=================================================
+ Hits         319384     341181      +21797     
- Misses        99322     241709     +142387     
- Partials      19700      23334       +3634     

Flag	Coverage Δ
integration	36.9327% <84.2105%> (?)

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

Components	Coverage Δ
dumpling	52.9656% <ø> (ø)
parser	∅ <ø> (∅)
br	52.5738% <ø> (+6.6995%)	⬆️

[AilinKid]

/test pull-integration-ddl-test

[tiprow]

@AilinKid: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/test pull-integration-ddl-test

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[AilinKid]

/ok-to-test

[zimulala]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-07-24 09:47:04.817116557 +0000 UTC m=+1038446.808058027: ☑️ agreed by hawkingrei.
• 2024-07-24 10:08:35.405919731 +0000 UTC m=+1039737.396861201: ☑️ agreed by zimulala.