dxf: get task from both mysql.tidb_global_task and mysql.tidb_global_task_history

[fzzf678]

What problem does this PR solve?

Issue Number: close #56942

Problem Summary:
#56942 (comment)

What changed and how does it work?

Get the task from mysql.tidb_global_task and mysql.tidb_global_task_history in updateDistTaskRowCount, and sum up the row count from both tidb_background_subtask and tidb_background_subtask_history table.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

1. Use sysbench create 100 tables with 10000 rows each.
2. After all ddl jobs finished, check the ddl job row count, the row_count should all be 10000:

mysql> admin show ddl jobs 100 where row_count != 10000;
Empty set (0.03 sec)

• 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 @fzzf678. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.2797%. Comparing base (5448f9f) to head (9dcd906).
Report is 14 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #57063         +/-   ##
=================================================
- Coverage   73.2123%   57.2797%   -15.9327%     
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  Files          1652       1807        +155     
  Lines        456050     645111     +189061     
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+ Hits         333885     369518      +35633     
- Misses       101648     250314     +148666     
- Partials      20517      25279       +4762     

Flag	Coverage Δ
integration	39.5491% <100.0000%> (?)
unit	72.6107% <100.0000%> (+0.1189%)	⬆️

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Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	62.8075% <ø> (+16.8259%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files:

• pkg/ddl/OWNERS [tangenta]
• pkg/disttask/OWNERS [tangenta]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-11-04 09:51:32.731986074 +0000 UTC m=+861805.571141619: ☑️ agreed by tangenta.
• 2024-11-05 02:12:13.886186896 +0000 UTC m=+920646.725342442: ☑️ agreed by CbcWestwolf.

[fzzf678]

/retest

[tiprow]

@fzzf678: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #57125.