planner: move table sample logic to planner util

[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 45.45455% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 74.5752%. Comparing base (788d505) to head (4927c5e).
Report is 3 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #53100        +/-   ##
================================================
+ Coverage   74.4098%   74.5752%   +0.1653%     
================================================
  Files          1490       1492         +2     
  Lines        356051     429589     +73538     
================================================
+ Hits         264937     320367     +55430     
- Misses        71835      89367     +17532     
- Partials      19279      19855       +576     

Flag	Coverage Δ
integration	49.1762% <45.4545%> (?)
unit	71.2433% <45.4545%> (-1.9291%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (-2.3014%)	⬇️
parser	∅ <ø> (∅)
br	50.3781% <ø> (+7.4896%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• pkg/planner/OWNERS [hawkingrei,qw4990]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-05-08 06:09:16.82421951 +0000 UTC m=+1028710.581355083: ☑️ agreed by qw4990.
• 2024-05-08 06:56:03.167988883 +0000 UTC m=+1031516.925124454: ☑️ agreed by hawkingrei.

[AilinKid]

/test unit-test

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[AilinKid]

/ok-to-test

[AilinKid]

/test check-dev2

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