statistics: fix puting wrong stats into cache (#52421) (#52422)

[hawkingrei]

What problem does this PR solve?

Issue Number: close #52419

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: crazycs520, winoros

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-09 03:52:27.859271399 +0000 UTC m=+934409.386811940: ☑️ agreed by winoros.
• 2024-04-09 03:56:23.888785041 +0000 UTC m=+934645.416325587: ☑️ agreed by crazycs520.