Mryange opened a new pull request, #54443:
URL: https://github.com/apache/doris/pull/54443
### What problem does this PR solve?
Previously, max/(min)_by(exprV, exprK) would expand both the types of exprV
and exprK, instantiating n * n templates.
Here, we only instantiate exprK, and the operations related to exprV are
wrapped using virtual functions. In this way, only n templates are instantiated.
Previous binary size:
```
361.99 MB
./vec/CMakeFiles/Vec.dir/aggregate_functions/aggregate_function_max_by.cpp.o
361.98 MB
./vec/CMakeFiles/Vec.dir/aggregate_functions/aggregate_function_min_by.cpp.o
```
Now:
```
22.33 MB
./vec/CMakeFiles/Vec.dir/aggregate_functions/aggregate_function_max_by.cpp.o
22.33 MB
./vec/CMakeFiles/Vec.dir/aggregate_functions/aggregate_function_min_by.cpp.o
```
### 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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