dongjoon-hyun commented on a change in pull request #25331: [SPARK-27768][SQL]
Infinity, -Infinity, NaN should be recognized in a case insensitive manner.
URL: https://github.com/apache/spark/pull/25331#discussion_r309914113
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
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@@ -563,7 +573,17 @@ case class Cast(child: Expression, dataType: DataType,
timeZoneId: Option[String
private[this] def castToFloat(from: DataType): Any => Any = from match {
case StringType =>
buildCast[UTF8String](_, s => try s.toString.toFloat catch {
- case _: NumberFormatException => null
+ case _: NumberFormatException =>
+ val str = s.trim.toString
+ if (str.equalsIgnoreCase("infinity")) {
+ Float.PositiveInfinity
+ } else if (str.equalsIgnoreCase("-infinity")) {
+ Float.NegativeInfinity
+ } else if (str.equalsIgnoreCase("nan")) {
+ Float.NaN
+ } else {
+ null
+ }
Review comment:
We don't need an assignment if you handle everything inside the function.
The function will return the right-side value of the assignment.
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