Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22037#discussion_r209127634
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala ---
@@ -455,6 +455,8 @@ object Decimal {
def apply(unscaled: Long, precision: Int, scale: Int): Decimal =
new Decimal().set(unscaled, precision, scale)
+ def apply(value: Array[Byte]): Decimal =
Decimal(value.map(_.toChar).mkString)
--- End diff --
why do we need it?
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