planner: remove unnecessary methods in global binding handler

[qw4990]

What problem does this PR solve?

Issue Number: ref #51347

Problem Summary: planner: remove unnecessary methods in global binding handler

What changed and how does it work?

just refactor, no logical change

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]

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files:

• OWNERS [AilinKid,hawkingrei]
• pkg/bindinfo/OWNERS [AilinKid,hawkingrei]
• pkg/planner/OWNERS [AilinKid,hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-17 08:54:18.194603958 +0000 UTC m=+947048.283406499: ☑️ agreed by AilinKid.
• 2024-12-17 08:54:27.151651265 +0000 UTC m=+947057.240453803: ☑️ agreed by hawkingrei.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.8848%. Comparing base (8a80a41) to head (63b93f3).
Report is 24 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #58343        +/-   ##
================================================
+ Coverage   73.2172%   73.8848%   +0.6675%     
================================================
  Files          1679       1679                
  Lines        462451     464033      +1582     
================================================
+ Hits         338594     342850      +4256     
+ Misses       103079     100483      -2596     
+ Partials      20778      20700        -78     

Flag	Coverage Δ
integration	43.5148% <33.3333%> (?)
unit	72.6032% <75.0000%> (+0.2476%)	⬆️

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	46.0380% <ø> (+0.0270%)	⬆️

[qw4990]

/test unit-test

[tiprow]

@qw4990: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/test unit-test

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[ti-chi-bot]

@qw4990: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/unit-test	925b8e8	link	true	/test unit-test

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