Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3673#discussion_r113657360
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/rules/dataSet/DataSetSingleRowJoinRule.scala
---
@@ -69,16 +69,19 @@ class DataSetSingleRowJoinRule
val dataSetLeftNode = RelOptRule.convert(join.getLeft,
FlinkConventions.DATASET)
val dataSetRightNode = RelOptRule.convert(join.getRight,
FlinkConventions.DATASET)
val leftIsSingle = isSingleRow(join.getLeft)
+ val rightIsSingle = isSingleRow(join.getRight)
new DataSetSingleRowJoin(
rel.getCluster,
traitSet,
dataSetLeftNode,
dataSetRightNode,
leftIsSingle,
+ rightIsSingle,
--- End diff --
`rightIsSingle` is `!leftIsSingle`, so we can omit this parameter, IMO
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