maropu commented on a change in pull request #27803:
URL: https://github.com/apache/spark/pull/27803#discussion_r416360187
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
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@@ -425,38 +425,35 @@ class AnalysisErrorSuite extends AnalysisTest {
TimeWindow(Literal("2016-01-01 01:01:01"), "1 second", "0 second", "0
second").as("window")),
"The slide duration" :: " must be greater than 0." :: Nil
)
-
+"Nested generators are supported only when inner generators " +
+ "are unary and adjacent with single output, but got: "
Review comment:
Oh...
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