Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3733#discussion_r113046948
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/datastream/DataStreamRel.scala
---
@@ -22,17 +22,16 @@ import org.apache.calcite.rel.RelNode
import org.apache.flink.streaming.api.datastream.DataStream
import org.apache.flink.table.api.StreamTableEnvironment
import org.apache.flink.table.plan.nodes.FlinkRel
-import org.apache.flink.types.Row
-trait DataStreamRel extends RelNode with FlinkRel {
+trait DataStreamRel[T] extends RelNode with FlinkRel {
--- End diff --
I don't think we need to parameterize `DataStreamRel`. All `DataStreamRel`
nodes should return `CRow` in my opinion.
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