mihailom-db commented on code in PR #45383:
URL: https://github.com/apache/spark/pull/45383#discussion_r1519766425
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/AnsiTypeCoercion.scala:
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@@ -173,6 +185,8 @@ object AnsiTypeCoercion extends TypeCoercionBase {
inType: DataType,
expectedType: AbstractDataType): Option[DataType] = {
(inType, expectedType) match {
+ case (_: StringType, st: StringType) =>
+ Some(st)
Review Comment:
I am not sure I get this. We need to add the rule for casting any StringType
class as acceptsType below would just lend us into keeping original
collationId, and we would not be able to cast different collations into one.
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