planner: Flaky test TestTiFlashLateMaterialization

[terry1purcell]

What problem does this PR solve?

Issue Number: close #61989

Problem Summary:

What changed and how does it work?

Explicit dump stats to KV to ensure that the stats meta is accurate and the test is not impacted by the timing of the update.

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 @terry1purcell. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.3343%. Comparing base (b3fbdc6) to head (f43024e).
Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #62067        +/-   ##
================================================
+ Coverage   72.9399%   73.3343%   +0.3943%     
================================================
  Files          1737       1737                
  Lines        482549     482568        +19     
================================================
+ Hits         351971     353888      +1917     
+ Misses       109022     107107      -1915     
- Partials      21556      21573        +17     

Flag	Coverage Δ
integration	42.3071% <ø> (?)

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

Components	Coverage Δ
dumpling	52.7804% <ø> (ø)
parser	∅ <ø> (∅)
br	46.5815% <ø> (-0.0181%)	⬇️

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[0xPoe]

Thanks!

[ti-chi-bot]

@terry1purcell: 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
idc-jenkins-ci-tidb/unit-test	f43024e	link	true	/test unit-test

Full PR test history. Your PR dashboard.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qw4990

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Needs approval from an approver in each of these files:

• pkg/planner/OWNERS [qw4990]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-06-30 03:51:10.782245817 +0000 UTC m=+1280523.505424798: ☑️ agreed by qw4990.

[terry1purcell]

Further investigation required.