*: refactor limit hint

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #48875

Problem Summary:

What changed and how does it work?

ONLY 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

[codecov]

Codecov Report

Merging #50730 (0df1b73) into master (f94e331) will increase coverage by 4.1685%.
Report is 2 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #50730        +/-   ##
================================================
+ Coverage   70.3658%   74.5343%   +4.1685%     
================================================
  Files          1456       1458         +2     
  Lines        420835     421003       +168     
================================================
+ Hits         296124     313792     +17668     
+ Misses       104365      87451     -16914     
+ Partials      20346      19760       -586     

Flag	Coverage Δ
integration	49.0610% <100.0000%> (?)
unit	70.2711% <100.0000%> (-0.0770%)	⬇️

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

Components	Coverage Δ
dumpling	54.0269% <ø> (ø)
parser	∅ <ø> (∅)
br	56.5356% <ø> (+5.9552%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [AilinKid,winoros]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-01-25 11:28:46.285439362 +0000 UTC m=+1046567.849737063: ☑️ agreed by AilinKid.
• 2024-01-25 11:32:47.902297089 +0000 UTC m=+1046809.466594794: ☑️ agreed by winoros.