cloud-fan commented on a change in pull request #32769:
URL: https://github.com/apache/spark/pull/32769#discussion_r647251795
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/ExpandExec.scala
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@@ -42,9 +42,33 @@ case class ExpandExec(
override lazy val metrics = Map(
"numOutputRows" -> SQLMetrics.createMetric(sparkContext, "number of output
rows"))
- // The GroupExpressions can output data with arbitrary partitioning, so set
it
- // as UNKNOWN partitioning
Review comment:
Shall we leverage `AliasAwareOutputPartitioning` and define the
`outputExpressions` as the shared prefix of `projections`?
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