HyukjinKwon commented on a change in pull request #28572:
URL: https://github.com/apache/spark/pull/28572#discussion_r427121973
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/DeserializerBuildHelper.scala
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@@ -161,6 +161,10 @@ object DeserializerBuildHelper {
case _: StructType => expr
case _: ArrayType => expr
case _: MapType => expr
+ case _: DecimalType =>
+ // For Scala/Java `BigDecimal`, we accept decimal types of any valid
precision/scale.
+ // Here we use the `DecimalType` object to indicate it.
+ UpCast(expr, DecimalType, walkedTypePath.getPaths)
Review comment:
Can we just directly pass `expected` to `UpCast`, and don't change the
definition of `UpCast`? I think that will fix it less invasively.
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