planner: import more expand test.

[AilinKid]

What problem does this PR solve?

Issue Number: close #42631

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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[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:

• 2024-07-26 09:35:18.339800643 +0000 UTC m=+1210540.330742112: ☑️ agreed by hawkingrei.
• 2024-07-26 09:36:02.582507362 +0000 UTC m=+1210584.573448832: ☑️ agreed by qw4990.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.9756%. Comparing base (2ee8c99) to head (8120ca7).
Report is 7 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #54962        +/-   ##
================================================
+ Coverage   72.7724%   73.9756%   +1.2031%     
================================================
  Files          1559       1560         +1     
  Lines        438446     440011      +1565     
================================================
+ Hits         319068     325501      +6433     
+ Misses        99720      94661      -5059     
- Partials      19658      19849       +191     

Flag	Coverage Δ
integration	47.0234% <ø> (?)
unit	71.6309% <ø> (-0.1343%)	⬇️

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

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	46.2617% <ø> (+0.3574%)	⬆️