morrySnow opened a new pull request, #68068:
URL: https://github.com/apache/doris/pull/68068
### What problem does this PR solve?
Related PR: #67732
Problem Summary:
Backport the nullable projected COUNT safety fix to branch-4.1. Aggregate
arguments are normalized through the Project before comparing them with filter
slots, preventing unsafe COUNT_ON_INDEX pushdown for IS NULL predicates. The
regression test is adapted to the 4.1 IndexType API.
### Release note
None
### Check List (For Author)
- Test
- [x] Unit Test
- Behavior changed:
- [x] Yes. Unsafe storage-layer count pushdown is rejected for nullable
projected count slots.
- Does this need documentation?
- [x] No.
### 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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