Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/9840#discussion_r46226966
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/DecimalType.scala ---
@@ -85,12 +85,24 @@ case class DecimalType(precision: Int, scale: Int)
extends FractionalType {
private[sql] def isWiderThan(other: DataType): Boolean = other match {
case dt: DecimalType =>
(precision - scale) >= (dt.precision - dt.scale) && scale >= dt.scale
- case dt: IntegralType =>
--- End diff --
That is correct. They could always truncate so we should return this and
fix the function below.
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