c21 commented on a change in pull request #30347:
URL: https://github.com/apache/spark/pull/30347#discussion_r523980835



##########
File path: 
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/UnsupportedOperationsSuite.scala
##########
@@ -414,209 +412,135 @@ class UnsupportedOperationsSuite extends SparkFunSuite {
     batchStreamSupported = false,
     streamBatchSupported = false)
 
-  // Left outer joins: *-stream not allowed
+  // Left outer, left semi, left anti join: *-stream not allowed
+  Seq((LeftOuter, "LeftOuter join"), (LeftSemi, "LeftSemi join"), (LeftAnti, 
"Left anti join"))

Review comment:
       @xuanyuanking - wondering what's the naming style we are trying to 
following here? TBH I would be surprised that someone fails to understand 
comment of `left outer`, if I omit `join` here. Similar comments happened 
several times in other files e.g. in 
[StreamingSymmetricHashJoinExec](https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamingSymmetricHashJoinExec.scala#L325)
 . But anyway I feel it's too nit, if you think it's worth the change, I can do 
it as well.




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