[BugFix] fix partition min prune with shadow partition

[kaijianding]

Why I'm doing:

mysql>  select min(pt) from test_table;
+---------+
| min(pt) |
+---------+
| NULL    |
+---------+
1 row in set (0.02 sec)

min(pt) should not be NULL

What I'm doing:

ignore shadow partition

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.

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

[CelerData-Reviewer]

@codex review

[github-actions]

🌎 Translation Required?

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

🕒 Last updated: Sat, 28 Feb 2026 11:08:33 GMT

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 👍

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[github-actions]

[Java-Extensions Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 3 / 3 (100.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/catalog/OlapTable.java	3	3	100.00%	[]

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[sonarqubecloud]

Quality Gate failed

Failed conditions
D Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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