zhli1142015 commented on code in PR #5754:
URL: https://github.com/apache/incubator-gluten/pull/5754#discussion_r1618082997
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backends-velox/src/main/scala/org/apache/gluten/execution/HashAggregateExecTransformer.scala:
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@@ -241,21 +226,21 @@ abstract class HashAggregateExecTransformer(
}
aggregateFunction match {
- case hllAdapter: HLLAdapter =>
+ case _ if aggregateFunction.aggBufferAttributes.size > 1 =>
+ generateMergeCompanionNode()
+ case _ =>
aggregateMode match {
- case Partial =>
- // For Partial mode output type is binary.
+ case Partial | PartialMerge =>
val partialNode = ExpressionBuilder.makeAggregateFunction(
VeloxAggregateFunctionsBuilder.create(args, aggregateFunction,
aggregateMode),
childrenNodeList,
modeKeyWord,
ConverterUtils.getTypeNode(
- hllAdapter.inputAggBufferAttributes.head.dataType,
- hllAdapter.inputAggBufferAttributes.head.nullable)
+ aggregateFunction.inputAggBufferAttributes.head.dataType,
Review Comment:
Spark HLL `inputAggBufferAttributes` is `Seq[Long]`. We rewrite HLL in
Gluten to adapt Velox's function signature, which immediate type is
`varbinary`.
https://github.com/facebookincubator/velox/blob/main/velox/functions/prestosql/aggregates/ApproxDistinctAggregate.cpp#L476C33-L476C49.
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