statistics: try to keep the drop stats behavior unchanged

[winoros]

What problem does this PR solve?

Issue Number: ref #57901, #58181

Problem Summary:

The first phase of the DROP STATS is the same with the case that the DDL event handler failed to handle the create table event:

• Both cases only have one record in mysql.stats_meta, no record in mysql.stats_histograms.

To keep the second case(DDL failed to handle the create table event, but the table should have stats) behavior correct and to make the DROP STATS not affected by the changes, this pull request changes the code to ease the problem.

What changed and how does it work?

This pull request tries to make a few changes to make sure that auto-analyze will not be triggered after the DROP STATS happen.

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

[hawkingrei]

Please add issue link.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 73.8622%. Comparing base (d92dce0) to head (845a9e9).
Report is 57 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #58307        +/-   ##
================================================
+ Coverage   73.2226%   73.8622%   +0.6396%     
================================================
  Files          1679       1709        +30     
  Lines        462548     471292      +8744     
================================================
+ Hits         338690     348107      +9417     
+ Misses       103086     101687      -1399     
- Partials      20772      21498       +726     

Flag	Coverage Δ
integration	45.8446% <50.0000%> (?)
unit	72.3581% <50.0000%> (-0.0118%)	⬇️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	46.0110% <ø> (-0.0121%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei

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• pkg/statistics/OWNERS [hawkingrei]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-17 14:48:25.154178223 +0000 UTC m=+968295.242980760: ☑️ agreed by hawkingrei.