Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/4532#discussion_r132834552
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/StreamTableEnvironment.scala
---
@@ -667,30 +719,62 @@ abstract class StreamTableEnvironment(
// get CRow plan
val plan: DataStream[CRow] = translateToCRow(logicalPlan, queryConfig)
+ val rowtimeFields = logicalType
+ .getFieldList.asScala
+ .filter(f => FlinkTypeFactory.isRowtimeIndicatorType(f.getType))
+
+ // convert the input type for the conversion mapper
+ // the input will be changed in the OutputRowtimeProcessFunction later
+ val convType = if (rowtimeFields.size > 1) {
+ throw new TableException(
+ s"Found more than one rowtime field:
[${rowtimeFields.map(_.getName).mkString(", ")}] in " +
+ s"the table that should be converted to a DataStream.\n" +
+ s"Please select the rowtime field that should be used as
event-time timestamp for the " +
+ s"DataStream by casting all other fields to TIMESTAMP.")
+ } else if (rowtimeFields.size == 1) {
+ val origRowType = plan.getType.asInstanceOf[CRowTypeInfo].rowType
+ val convFieldTypes = origRowType.getFieldTypes.map { t =>
+ if (FlinkTypeFactory.isRowtimeIndicatorType(t)) {
--- End diff --
.....
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