Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/19327#discussion_r141986634
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/UnsupportedOperationsSuite.scala
---
@@ -413,36 +414,103 @@ class UnsupportedOperationsSuite extends
SparkFunSuite {
batchStreamSupported = false,
streamBatchSupported = false)
- // Left outer joins: *-stream not allowed
+ // Left outer joins: *-stream not allowed with default condition
testBinaryOperationInStreamingPlan(
"left outer join",
_.join(_, joinType = LeftOuter),
- streamStreamSupported = false,
batchStreamSupported = false,
- expectedMsg = "left outer/semi/anti joins")
+ streamStreamSupported = false,
+ expectedMsg = "outer join")
+
+ // Left outer joins: stream-stream allowed with join on watermark
attribute
+ assertSupportedInStreamingPlan(
+ s"left outer join with stream-stream relations and join on watermark
attribute key",
+ streamRelation.join(streamRelation, joinType = LeftOuter,
+ condition = Some(attributeWithWatermark === attributeWithWatermark)),
--- End diff --
check that this should not require watermark to be present on both sides.
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