planner: add more test cases for plan cache

[qw4990]

What problem does this PR solve?

Issue Number: ref #54057

Problem Summary: planner: add more test cases for plan cache

What changed and how does it work?

planner: add more test cases for plan cache

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 @qw4990. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.3872%. Comparing base (5ab6738) to head (624d6b0).
Report is 3 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #56914         +/-   ##
=================================================
- Coverage   73.3167%   56.3872%   -16.9295%     
=================================================
  Files          1636       1763        +127     
  Lines        453659     633512     +179853     
=================================================
+ Hits         332608     357220      +24612     
- Misses       100674     252144     +151470     
- Partials      20377      24148       +3771     

Flag	Coverage Δ
integration	37.0456% <ø> (?)
unit	72.4857% <ø> (-0.0395%)	⬇️

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

Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.6882% <ø> (+6.6765%)	⬆️

[elsa0520]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files:

• pkg/planner/OWNERS [AilinKid,elsa0520]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-28 09:45:54.7383441 +0000 UTC m=+256667.577499631: ☑️ agreed by AilinKid.
• 2024-10-28 10:01:59.693419799 +0000 UTC m=+257632.532575341: ☑️ agreed by elsa0520.