Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3574#discussion_r108685193
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/AggregateUtil.scala
---
@@ -730,6 +736,41 @@ object AggregateUtil {
(aggFunction, accumulatorRowType, aggResultRowType)
}
+ /**
+ * Function for building the processing logic for aggregating data in
row bounded windows
+ *
+ * @param namedAggregates List of calls to aggregate functions and
their output field names
+ * @param inputType Input row type
+ * @param rowType Type info of row
+ * @param precedingOffset The window lower boundary expressed in
number of rows
+ * @return [[org.apache.flink.streaming.api.functions.ProcessFunction]]
+ */
+ private[flink] def createBoundedProcessingOverProcessFunction(
+ namedAggregates: Seq[CalcitePair[AggregateCall, String]],
+ inputType: RelDataType,
+ rowType: RowTypeInfo,
+ precedingOffset: Int): ProcessFunction[Row, Row] = {
+
+ val (aggFields, aggregates) =
+ transformToAggregateFunctions(
+ namedAggregates.map(_.getKey),
+ inputType,
+ needRetraction = true)
+
+ val aggregationStateType: RowTypeInfo =
+ createDataSetAggregateBufferDataType(Array(), aggregates, inputType)
--- End diff --
can be replaced by `createAccumulatorRowType(aggregates)`
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