table: use writable columns to avoid columns not match when add column DDL exec parallel with update DML (#60048)

[xhebox]

close #60047

What problem does this PR solve?

Issue Number: close #xxx

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]

Hi @xhebox. Thanks for your PR.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Defined2014, tangenta

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-08-05 09:40:17.519916804 +0000 UTC m=+347527.662677980: ☑️ agreed by tangenta.
• 2025-08-05 09:40:28.778731076 +0000 UTC m=+347538.921492252: ☑️ agreed by Defined2014.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (release-6.5-20250805-v6.5.12@db45d0f). Learn more about missing BASE report.

Additional details and impacted files

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