importinto: fix TestGlobalSortMultiFiles fail on classic kernel

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #61702

Problem Summary:

What changed and how does it work?

TestGlobalSortMultiFiles is changed in #64402, it works on nextgen, but it always fails on classic kernel, but i am not sure why the CI merges it

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 @D3Hunter. Thanks for your PR.

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[joechenrh]

Suggested change

	// 1 subtask, encoding 10 files using 4 threads.
	// 1 subtask, encoding 10 files.

[D3Hunter]

i will separate them into 2 cases

[D3Hunter]

def3a5a

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: GMHDBJD, joechenrh

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-11-13 07:49:54.186455068 +0000 UTC m=+947643.629484947: ☑️ agreed by GMHDBJD.
• 2025-11-13 07:50:56.514239034 +0000 UTC m=+947705.957268923: ☑️ agreed by joechenrh.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.3862%. Comparing base (3acae2d) to head (841752d).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #64462        +/-   ##
================================================
+ Coverage   72.6901%   73.3862%   +0.6961%     
================================================
  Files          1866       1867         +1     
  Lines        506190     506637       +447     
================================================
+ Hits         367950     371802      +3852     
+ Misses       115861     112611      -3250     
+ Partials      22379      22224       -155     

Flag	Coverage Δ
integration	41.8316% <ø> (?)
unit	72.5218% <ø> (+0.2527%)	⬆️

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

Components	Coverage Δ
dumpling	52.8700% <ø> (ø)
parser	∅ <ø> (∅)
br	46.2413% <ø> (+0.0976%)	⬆️

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[D3Hunter]

/hold

[D3Hunter]

/unhold