KurtYoung commented on a change in pull request #8109:
[FLINK-12017][table-planner-blink] Support translation from Rank/Deduplicate to
StreamTransformation
URL: https://github.com/apache/flink/pull/8109#discussion_r272879137
##########
File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/plan/nodes/physical/stream/StreamExecDeduplicate.scala
##########
@@ -73,4 +92,92 @@ class StreamExecDeduplicate(
.item("order", orderString)
}
+ //~ ExecNode methods
-----------------------------------------------------------
+
+ override protected def translateToPlanInternal(
+ tableEnv: StreamTableEnvironment): StreamTransformation[BaseRow] = {
+
+ // TODO checkInput is not acc retract after FLINK- is done
+ val inputIsAccRetract = false
+
+ if (inputIsAccRetract) {
+ throw new TableException(
+ "Deduplicate: Retraction on Deduplicate is not supported yet.\n" +
+ "please re-check sql grammar. \n" +
+ "Note: Deduplicate should not follow a non-windowed GroupBy
aggregation.")
+ }
+
+ val inputTransform = getInputNodes.get(0).translateToPlan(tableEnv)
+ .asInstanceOf[StreamTransformation[BaseRow]]
+
+ val rowTypeInfo =
inputTransform.getOutputType.asInstanceOf[BaseRowTypeInfo]
+
+ val generateRetraction = true
Review comment:
I think keep first row will not generate retraction?
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