wankunde commented on PR #37594:
URL: https://github.com/apache/spark/pull/37594#issuecomment-1225429044
Bad case :
```
explain cost select cast(id as smallint) from ( select distinct id from
range(10)) t;
+----------------------------------------------------+
| plan |
+----------------------------------------------------+
| == Optimized Logical Plan ==
Aggregate [id#760L], [cast(id#760L as smallint) AS id#761],
Statistics(sizeInBytes=50.0 B)
+- Range (0, 10, step=1, splits=None), Statistics(sizeInBytes=80.0 B)
== Physical Plan ==
AdaptiveSparkPlan isFinalPlan=false
+- HashAggregate(keys=[id#760L], functions=[], output=[id#761]),
OptimizeTags: [created by RemoveRedundantPartialAggregates]
+- Range (0, 10, step=1, splits=300)
```
Close this
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