maropu commented on a change in pull request #28869:
URL: https://github.com/apache/spark/pull/28869#discussion_r442756818
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/BaseAggregateExec.scala
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@@ -53,15 +53,24 @@ trait BaseAggregateExec extends UnaryExecNode {
// can't bind the `mergeExpressions` with the output of the partial
aggregate, as they use
// the `inputAggBufferAttributes` of the original `DeclarativeAggregate`
before copy. Instead,
// we shall use `inputAggBufferAttributes` after copy to match the new
`mergeExpressions`.
- val aggAttrs = aggregateExpressions
- // there're exactly four cases needs `inputAggBufferAttributes` from
child according to the
- // agg planning in `AggUtils`: Partial -> Final, PartialMerge -> Final,
- // Partial -> PartialMerge, PartialMerge -> PartialMerge.
- .filter(a => a.mode == Final || a.mode ==
PartialMerge).map(_.aggregateFunction)
- .flatMap(_.inputAggBufferAttributes)
+ val aggAttrs = inputAggBufferAttributes
child.output.dropRight(aggAttrs.length) ++ aggAttrs
} else {
child.output
}
}
+
+ protected def inputAggBufferAttributes: Seq[Attribute] = {
+ aggregateExpressions
+ // there're exactly four cases needs `inputAggBufferAttributes` from
child according to the
+ // agg planning in `AggUtils`: Partial -> Final, PartialMerge -> Final,
+ // Partial -> PartialMerge, PartialMerge -> PartialMerge.
+ .filter(a => a.mode == Final || a.mode == PartialMerge)
+ .flatMap(_.aggregateFunction.inputAggBufferAttributes)
+ }
+
+ override def producedAttributes: AttributeSet =
+ // it's not empty when the inputAggBufferAttributes is from the child
Aggregate, which contains
+ // subquery in AggregateFunction. See SPARK-31620 for more details.
Review comment:
nit: need indents here?
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