ddl: fix job's row count for global sort

[tangenta]

What problem does this PR solve?

Issue Number: close #59897

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

[tiprow]

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[codecov]

Codecov Report

Attention: Patch coverage is 68.08511% with 15 lines in your changes missing coverage. Please review.

Project coverage is 74.8226%. Comparing base (b500d9e) to head (4b068d9).
Report is 3 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59898        +/-   ##
================================================
+ Coverage   72.9585%   74.8226%   +1.8641%     
================================================
  Files          1700       1746        +46     
  Lines        469738     478263      +8525     
================================================
+ Hits         342714     357849     +15135     
+ Misses       105904      97797      -8107     
- Partials      21120      22617      +1497     

Flag	Coverage Δ
integration	48.8881% <0.0000%> (?)
unit	72.1314% <68.0851%> (-0.0456%)	⬇️

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	61.5695% <ø> (+16.6860%)	⬆️

[D3Hunter]

rest lgtm

[CbcWestwolf]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CbcWestwolf, D3Hunter

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-03-04 12:19:40.749550025 +0000 UTC m=+357693.878469769: ☑️ agreed by CbcWestwolf.
• 2025-03-04 12:43:29.011007387 +0000 UTC m=+359122.139927131: ☑️ agreed by D3Hunter.