Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4625#discussion_r142682283
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/datastream/DataStreamWindowJoin.scala
---
@@ -152,19 +176,40 @@ class DataStreamWindowJoin(
}
}
- def createProcTimeInnerJoinFunction(
+ def createEmptyInnerJoin(
+ leftDataStream: DataStream[CRow],
+ rightDataStream: DataStream[CRow],
+ returnTypeInfo: TypeInformation[CRow]) = {
+ leftDataStream.connect(rightDataStream).process(
+ new CoProcessFunction[CRow, CRow, CRow] {
+ override def processElement1(
+ value: CRow,
+ ctx: CoProcessFunction[CRow, CRow, CRow]#Context,
+ out: Collector[CRow]) = {
+ //Do nothing.
+ }
+ override def processElement2(
+ value: CRow,
+ ctx: CoProcessFunction[CRow, CRow, CRow]#Context,
+ out: Collector[CRow]) = {
+ //Do nothing.
+ }
+ })
--- End diff --
add a `returns(returnTypeInfo)` call to ensure we use the right type.
---
