[Doc] Document for STRUCT_CAST_BY_NAME SQL mode

[EsoragotoSpirit]

Why I'm doing:

What I'm doing:

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
  • This pr needs auto generate documentation
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 4.1
  • 4.0
  • 3.5
  • 3.4

[github-actions]

🌎 Translation Required?

✅ All translation files are up to date.
Great job! No translation actions are required for this PR.

🕒 Last updated: Wed, 29 Apr 2026 06:54:56 GMT

[github-actions]

[Java-Extensions Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

@Mergifyio backport branch-4.1

[mergify]

backport branch-4.1

✅ Backports have been created

Details

• #72341 [Doc] Document for STRUCT_CAST_BY_NAME SQL mode (backport #72325) has been created for branch branch-4.1 but encountered conflicts

Cherry-pick of a02a396 has failed:

On branch mergify/bp/branch-4.1/pr-72325
Your branch is up to date with 'origin/branch-4.1'.

You are currently cherry-picking commit a02a39693b.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   docs/en/sql-reference/System_variable.md
	both modified:   docs/ja/sql-reference/System_variable.md
	both modified:   docs/zh/sql-reference/System_variable.md

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally