Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/5350#discussion_r28018991
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
---
@@ -323,7 +323,9 @@ case class Cast(child: Expression, dataType: DataType)
extends UnaryExpression w
private[this] def castToDecimal(from: DataType, target: DecimalType):
Any => Any = from match {
case StringType =>
- buildCast[String](_, s => try changePrecision(Decimal(s.toDouble),
target) catch {
+ buildCast[UTF8String](_, s => try {
+ changePrecision(Decimal(s.toString.toDouble), target)
--- End diff --
I guess Double is the wide format and range for numbers, or we need to have
a special parser for it.
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