vladanvasi-db commented on code in PR #48585:
URL: https://github.com/apache/spark/pull/48585#discussion_r1810881746
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CollationTypeCasts.scala:
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@@ -200,4 +199,15 @@ object CollationTypeCasts extends TypeCoercionRule {
}
}
}
+
+ /**
+ * Returns whether the expression has explicit collated output type.
+ */
+ def hasExplicitCollation(expr: Expression): Boolean = {
+ expr match {
+ case _: Collate => true
+ case alias: Alias => hasExplicitCollation(alias.child)
Review Comment:
I will add a test case for this with an expression that gets the subquery as
its input in these set operators
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