planner: correct plan when scan tidb related cluster table with KeepOrder

[Defined2014]

What problem does this PR solve?

Issue Number: close #51723

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 @Defined2014. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 76.19048% with 15 lines in your changes missing coverage. Please review.

Project coverage is 74.1528%. Comparing base (a6cd5e7) to head (3054a6c).
Report is 52 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #51922        +/-   ##
================================================
+ Coverage   73.0959%   74.1528%   +1.0568%     
================================================
  Files          1676       1679         +3     
  Lines        463577     479337     +15760     
================================================
+ Hits         338856     355442     +16586     
+ Misses       103888     102670      -1218     
- Partials      20833      21225       +392     

Flag	Coverage Δ
integration	43.3003% <71.4285%> (?)
unit	72.6294% <58.7301%> (+0.3573%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.4545% <ø> (-0.3101%)	⬇️

[Defined2014]

/test check-dev2

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/test check-dev2

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[Defined2014]

/retest

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[Defined2014]

/retest

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[winoros]

/hold for a while, there might be some memory issue if we call plan.Clone()

[ti-chi-bot]

PR needs rebase.

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-09 07:46:44.324702028 +0000 UTC m=+426147.613533734: ☑️ agreed by AilinKid.
• 2025-01-09 14:06:57.068450016 +0000 UTC m=+448960.357281720: ☑️ agreed by winoros.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #58846.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #58847.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #58848.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #58849.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #58850.