Gabriel39 opened a new pull request, #66627:
URL: https://github.com/apache/doris/pull/66627
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: Dropping an Iceberg column can leave historical partition
specs referencing a field ID that no longer exists in the current schema, which
makes historical metadata unreadable. The same failure occurs when dropping a
struct ancestor of a referenced nested field. Resolve top-level and nested drop
targets before committing the schema update, then reject the drop when any
historical partition spec references the target field or a field in its subtree.
### Release note
Iceberg column drops now fail explicitly when the column, or a nested field
beneath it, is referenced by a historical partition spec.
### Check List (For Author)
- Test
- [ ] Regression test
- [x] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason
- Behavior changed:
- [ ] No.
- [x] Yes. Invalid Iceberg column drops are rejected before corrupting
historical partition metadata.
- Does this need documentation?
- [x] No.
- [ ] Yes.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
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