Yukang-Lian opened a new pull request, #67587:
URL: https://github.com/apache/doris/pull/67587
### What problem does this PR solve?
Issue Number: None
Related PR: #66337
Problem Summary: Backport #66337 to `branch-4.0`.
While a schema change target tablet is `TABLET_NOTREADY`, cumulative
compaction should merge only older rowsets and leave the newest 10 versions
unmerged. The filter used the inverse comparison, so a compaction output could
cross the base tablet's maximum version and prevent incremental schema-change
conversion with `VERSION_ALREADY_MERGED`.
This change reverses the comparison in both local and Cloud size-based
cumulative compaction policies. It also adds focused unit-test coverage adapted
to the branch-4.0 test layout.
### Release note
Fix schema changes that could fail when cumulative compaction merged the
latest versions on the new tablet.
### Check List (For Author)
- Test
- [ ] Regression test
- [x] Unit Test
- Focused local and Cloud unit tests are included; hosted CI is
requested with `run buildall`.
- `build-support/check-format.sh`: passed
- `git diff --check`: passed
- [ ] Manual test
- [ ] No need to test or manual test
- Behavior changed: Yes. `TABLET_NOTREADY` cumulative compaction now leaves
the latest 10 versions unmerged.
- Does this need documentation? No
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