planner: move some common code on stats to stats_util

[qw4990]

What problem does this PR solve?

Issue Number: ref #46905

Problem Summary: planner: move some common code on stats to stats_util

What is changed and how it works?

planner: move some common code on stats to stats_util

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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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-09-27 03:49:03.439638793 +0000 UTC m=+419533.157981010: ☑️ agreed by hawkingrei.
• 2023-09-27 03:54:08.761626084 +0000 UTC m=+419838.479968302: ☑️ agreed by time-and-fate.

[tiprow]

@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
tiprow_fast_test	e328fc6	link	true	/test tiprow_fast_test

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[codecov]

Codecov Report

Merging #47312 (2fe1315) into master (99d9d41) will increase coverage by 0.1215%.
Report is 1 commits behind head on master.
The diff coverage is 83.5164%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #47312        +/-   ##
================================================
+ Coverage   72.5647%   72.6862%   +0.1215%     
================================================
  Files          1348       1370        +22     
  Lines        401100     407392      +6292     
================================================
+ Hits         291057     296118      +5061     
- Misses        90941      92447      +1506     
+ Partials      19102      18827       -275     

Flag	Coverage Δ
integration	36.7033% <43.9560%> (?)
unit	72.4768% <79.1208%> (-0.0879%)	⬇️

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

Components	Coverage Δ
dumpling	53.9913% <ø> (ø)
parser	84.8622% <ø> (-0.0108%)	⬇️
br	48.7367% <ø> (-4.2968%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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