Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/23135#discussion_r236097033 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala --- @@ -575,6 +575,19 @@ case class Range( } } +/** + * This is a Group by operator with the aggregate functions and projections. + * + * @param groupingExpressions expressions for grouping keys + * @param aggregateExpressions expressions for a project list, which could contain + * [[org.apache.spark.sql.catalyst.expressions.aggregate.AggregateFunction]]s. + * + * Note: Currently, aggregateExpressions correspond to both [[AggregateExpression]] and the output --- End diff -- Removed it from the description.
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