ddl,tables: only write the index when it meets partial index condition (#62762)

[YangKeao]

This is a cherry-pick for partial index and some related bug fixes:

• ddl,tables: only write the index when it meets partial index condition #62762
• ddl: enhance checkpoint management with chunk tracking #64607 is needed to avoid the issue caused by 0 scan count.
• ddl: maintain the affect columns for partial index affect columns #64476 is also needed to fix partial index wrong schema after some DDLs.
• dml: fix the data/index inconsistency when updating partial index or using on dup key update #65808 is needed to fix several partial index issues.

What problem does this PR solve?

Issue Number: close #62761

Problem Summary:

What changed and how does it work?

1. Modify the tables.index to parse/store the expression of partialConditionExpression.
2. Add a MeetPartialCondition to check whether it'll meet the condition.
3. Add some tests about the DML during the DDL on the same table.
4. Modify the row count of admin show ddl job from the added count to the scanned count.
5. Support admin check table for partial index.

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

[codecov]

Codecov Report

❌ Patch coverage is 72.33294% with 236 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (release-8.5-20260116-v8.5.5@1fa258b). Learn more about missing BASE report.

Additional details and impacted files

@@                       Coverage Diff                        @@
##             release-8.5-20260116-v8.5.5     #65700   +/-   ##
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  Lines                                  ?     470233           
  Branches                               ?          0           
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  Hits                                   ?     344101           
  Misses                                 ?     103227           
  Partials                               ?      22905           

Flag	Coverage Δ
integration	50.9613% <63.6576%> (?)
unit	64.8615% <47.1277%> (?)

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

Components	Coverage Δ
dumpling	52.9278% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	63.9821% <0.0000%> (?)

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-01-22 14:54:45.629372454 +0000 UTC m=+678513.243329320: ☑️ agreed by winoros.
• 2026-01-27 08:06:08.67291877 +0000 UTC m=+1085996.286875616: ☑️ agreed by wjhuang2016.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Leavrth, tangenta, winoros, wjhuang2016, yudongusa

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Details

Needs approval from an approver in each of these files:

• OWNERS [Leavrth,tangenta,winoros,wjhuang2016]
• br/OWNERS [Leavrth]
• pkg/ddl/OWNERS [tangenta,wjhuang2016]
• pkg/infoschema/OWNERS [tangenta,wjhuang2016]
• pkg/meta/OWNERS [tangenta,wjhuang2016]
• pkg/parser/OWNERS [tangenta,yudongusa]
• pkg/planner/OWNERS [winoros]
• pkg/table/OWNERS [tangenta,wjhuang2016]

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