ulysses-you opened a new pull request #35473:
URL: https://github.com/apache/spark/pull/35473
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### What changes were proposed in this pull request?
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- Add a new rule `OptimizeOneMaxRowPlan` in normal Optimizer and AQE
Optimizer.
- Move the similar optimization of `EliminateSorts` into
`OptimizeOneMaxRowPlan`, also update its comment and test
### Why are the changes needed?
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Optimize the plan if its max row is equal to or less than 1 in these cases:
- if the child of sort max rows less than or equal to 1, remove the sort
- if the child of local sort max rows per partition less than or equal to 1,
remove the local sort
- if the child of aggregate max rows less than or equal to 1 and it's
grouping only (include the rewritten distinct plan), remove the aggregate
- if the child of aggregate max rows less than or equal to 1, set distinct
to false in all aggregate expression
### Does this PR introduce _any_ user-facing change?
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no, only change the plan
### How was this patch tested?
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- Add a new test `OptimizeOneMaxRowPlanSuite` for normal optimizer
- Add test in `AdaptiveQueryExecSuite` for AQE optimizer
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