vladanvasi-db commented on code in PR #48585:
URL: https://github.com/apache/spark/pull/48585#discussion_r1810870040
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/AnsiTypeCoercion.scala:
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@@ -148,6 +149,10 @@ object AnsiTypeCoercion extends TypeCoercionBase {
// interval type the string should be promoted as. There are many
possible interval
// types, such as year interval, month interval, day interval, hour
interval, etc.
case (_: StringType, _: AnsiIntervalType) => None
+ // [SPARK-50060] If a binary operation contains at least one collated
string types, we can't
+ // decide which collation the result should have.
+ case (d1: StringType, d2: StringType) if
SchemaUtils.hasNonUTF8BinaryCollation(d1) ||
Review Comment:
`CollationTypeCast` will work for expressions, but it will not work for set
operators such as `union`. However, this can be removed since we do not use it
when we have collated string column in the output
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