Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20023#discussion_r162064252
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/DecimalType.scala ---
@@ -136,10 +137,52 @@ object DecimalType extends AbstractDataType {
case DoubleType => DoubleDecimal
}
+ private[sql] def forLiteral(literal: Literal): DecimalType =
literal.value match {
--- End diff --
but we also have `fromDecimal`...
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