Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7605#discussion_r35389709
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
---
@@ -36,14 +36,13 @@ case class Average(child: Expression) extends
AlgebraicAggregate {
override def inputTypes: Seq[AbstractDataType] =
Seq(TypeCollection(NumericType, NullType))
private val resultType = child.dataType match {
- case DecimalType.Fixed(precision, scale) =>
- DecimalType(precision + 4, scale + 4)
- case DecimalType.Unlimited => DecimalType.Unlimited
+ case DecimalType.Fixed(p, s) =>
--- End diff --
actually i realized you couldn't do that because of the unapply.
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