*: modify the printing of column default expression in SHOW CREATE TABLE and Restore

[CbcWestwolf]

What problem does this PR solve?

Issue Number: close #52939

Problem Summary:

See the description of the issue.

What changed and how does it work?

If the column default expression is ast.FuncCallExpr except ast.CurrentTimestamp, wrap an outer parentheses in SHOW CREATE TABLE and Restore()

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.

Wrap some column default expressions within parentheses in SHOW CREATE TABLE and Restore

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[tiprow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[CbcWestwolf]

/test all

[codecov]

Codecov Report

Attention: Patch coverage is 65.00000% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 55.4486%. Comparing base (58bfd1c) to head (e94c799).
Report is 8 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #52940         +/-   ##
=================================================
- Coverage   72.3753%   55.4486%   -16.9268%     
=================================================
  Files          1481       1594        +113     
  Lines        428397     601663     +173266     
=================================================
+ Hits         310054     333614      +23560     
- Misses        99049     244825     +145776     
- Partials      19294      23224       +3930     

Flag	Coverage Δ
integration	22.5728% <0.0000%> (?)
unit	71.2227% <65.0000%> (-0.0342%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	49.8593% <ø> (+8.6684%)	⬆️

[zimulala]

/retest

[zimulala]

LGTM

[CbcWestwolf]

/retest

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-28 03:55:34.453973041 +0000 UTC m=+156688.211108617: ☑️ agreed by zimulala.
• 2024-04-28 05:10:10.531796493 +0000 UTC m=+161164.288932067: ☑️ agreed by tangenta.

[CbcWestwolf]

/retest

[easonn7]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: easonn7, tangenta, zimulala

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [tangenta,zimulala]
• pkg/ddl/OWNERS [tangenta,zimulala]
• pkg/parser/OWNERS [easonn7,tangenta]

Approvers can indicate their approval by writing /approve in a comment
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[CbcWestwolf]

/retest

[CbcWestwolf]

/retest-required

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.1: #52948.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #52949.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #52950.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #52951.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #52952.