statistics: fix wrong behavior for primary key' non-lite init stats

[hawkingrei]

What problem does this PR solve?

Issue Number: ref #53710

Problem Summary:

What changed and how does it work?

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-07-01 06:43:25.293479408 +0000 UTC m=+1220331.778968238: ☑️ agreed by AilinKid.
• 2024-07-01 06:44:04.822752017 +0000 UTC m=+1220371.308240843: ☑️ agreed by winoros.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-6.5-20231229-v6.5.6@ceff3eb). Learn more about missing BASE report.

Additional details and impacted files

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[hawkingrei]

/retest

[hawkingrei]

/retest