planner: move more methods from StatsHandle to its sub-packages

[qw4990]

What problem does this PR solve?

Issue Number: ref #46905

Problem Summary: planner: move more methods from StatsHandle to its sub-packages

What is changed and how it works?

planner: move more methods from StatsHandle to its sub-packages

No logical change, just refactor.

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.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[codecov]

Codecov Report

Merging #47739 (454beb1) into master (1c18555) will increase coverage by 1.0430%.
Report is 3 commits behind head on master.
The diff coverage is 56.5517%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #47739        +/-   ##
================================================
+ Coverage   71.8968%   72.9399%   +1.0430%     
================================================
  Files          1397       1421        +24     
  Lines        405118     412460      +7342     
================================================
+ Hits         291267     300848      +9581     
+ Misses        94231      92811      -1420     
+ Partials      19620      18801       -819     

Flag	Coverage Δ
integration	41.5041% <16.5517%> (?)
unit	72.0496% <56.5517%> (+0.1528%)	⬆️

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

Components	Coverage Δ
dumpling	53.9913% <ø> (ø)
parser	∅ <ø> (∅)
br	48.7365% <ø> (-4.2421%)	⬇️

[hawkingrei]

/ok-to-test

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [AilinKid,hawkingrei]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-10-18 07:37:52.525980429 +0000 UTC m=+1815470.113090574: ☑️ agreed by hawkingrei.
• 2023-10-18 07:41:47.624173054 +0000 UTC m=+1815705.211283200: ☑️ agreed by AilinKid.

[qw4990]

/test unit-test

[tiprow]

@qw4990: The specified target(s) for /test were not found.
The following commands are available to trigger required jobs:

• /test tiprow_fast_test

Use /test all to run all jobs.

In response to this:

/test unit-test

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #47751.