englefly opened a new pull request, #64849:
URL: https://github.com/apache/doris/pull/64849
### What problem does this PR solve?
When a group-by key is functionally dependent on another key (e.g. s_suppkey
-> s_name via PK) but required in output, remove it from GROUP BY and wrap with
ANY_VALUE().
Previously EliminateGroupByKey kept such keys in GROUP BY to preserve SQL
semantics. Now they are replaced with ANY_VALUE wrappers in the output,
allowing the group-by set to be minimized while keeping the column in SELECT.
Public findCanBeRemovedExpressions() API preserved for backward
compatibility. Internal logic split into FindResult with separate
removeExpression and wrapWithAnyValue sets.
Test: testEliminateByPkWithOutputNeeded verifies ANY_VALUE wrapping when
SELECT contains an FD-redundant group-by key.
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] 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 <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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