table: fix the issue that the default value for BIT column is wrong | tidb-test=pr/2426 (#57303)

[ti-chi-bot]

This is an automated cherry-pick of #57303

What problem does this PR solve?

Issue Number: close #57301, close #57312

Problem Summary:

1. The CREATE TABLE statement didn't assert whether the default value for BIT is valid.
2. The default value for BIT column is casted multiple times and may cause unexpected behavior.

What changed and how does it work?

1. Revert part of types: convert string to MySQL BIT correctly #21310
2. Validate the length of BIT default value.

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

Attention: Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.5@fc8b225). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.5     #57358   +/-   ##
================================================
  Coverage               ?   58.9246%           
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  Files                  ?       1784           
  Lines                  ?     661372           
  Branches               ?          0           
================================================
  Hits                   ?     389711           
  Misses                 ?     248071           
  Partials               ?      23590           

Flag	Coverage Δ
integration	39.9967% <57.1428%> (?)
unit	75.2240% <35.7142%> (?)

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

Components	Coverage Δ
dumpling	56.2477% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.2892% <0.0000%> (?)

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wjhuang2016, YangKeao

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• OWNERS [YangKeao,wjhuang2016]
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-06 07:42:11.74414842 +0000 UTC m=+1399919.363802935: ☑️ agreed by wjhuang2016.
• 2025-01-06 08:13:57.210588654 +0000 UTC m=+168580.499420359: ☑️ agreed by YangKeao.