Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1981#discussion_r63253874
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/nodes/dataset/DataSetJoin.scala
---
@@ -159,9 +158,20 @@ class DataSetJoin(
val leftDataSet =
left.asInstanceOf[DataSetRel].translateToPlan(tableEnv)
val rightDataSet =
right.asInstanceOf[DataSetRel].translateToPlan(tableEnv)
+ val (joinOperator, nullCheck) = joinType match {
+ case JoinRelType.INNER => (leftDataSet.join(rightDataSet), false)
+ case JoinRelType.LEFT => (leftDataSet.leftOuterJoin(rightDataSet),
true)
+ case JoinRelType.RIGHT => (leftDataSet.rightOuterJoin(rightDataSet),
true)
+ case JoinRelType.FULL => (leftDataSet.fullOuterJoin(rightDataSet),
true)
+ }
+
+ if (nullCheck && !config.getNullCheck) {
+ throw new TableException("Null check in TableEnvironment must be
enabled for outer joins.")
--- End diff --
TableEnvironment should be TableConfig
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