planner: simplify the session binding handler code

[qw4990]

What problem does this PR solve?

Issue Number: ref #51347

Problem Summary: planner: simplify the session binding handler code

What changed and how does it work?

planner: simplify the session binding handler code

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

Merging #51442 (eb4d49d) into master (1d24b1c) will increase coverage by 2.0357%.
Report is 4 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #51442        +/-   ##
================================================
+ Coverage   70.6992%   72.7350%   +2.0357%     
================================================
  Files          1462       1462                
  Lines        435224     435566       +342     
================================================
+ Hits         307700     316809      +9109     
+ Misses       108234      98808      -9426     
- Partials      19290      19949       +659     

Flag	Coverage Δ
integration	49.0673% <100.0000%> (?)
unit	70.4335% <100.0000%> (-0.0663%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	51.4241% <ø> (+5.5699%)	⬆️

[Rustin170506]

Looks good to me. Thanks! 👍

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-01 04:06:34.017856696 +0000 UTC m=+1194082.765479803: ☑️ agreed by hawkingrei.
• 2024-03-01 05:28:08.411413266 +0000 UTC m=+1198977.159036375: ☑️ agreed by hi-rustin.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[hawkingrei]

/test all