[SPARK-4425][SQL] Handle NaN or Infinity cast to Timestamp correctly.

`Cast` from `NaN` or `Infinity` of `Double` or `Float` to `TimestampType` throws `NumberFormatException`.

Author: Takuya UESHIN <ueshin@happy-camper.st>

Closes #3283 from ueshin/issues/SPARK-4425 and squashes the following commits:

14def0c [Takuya UESHIN] Fix Cast to be able to handle NaN or Infinity to TimestampType.

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala

@@ -32,6 +32,8 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
   override def nullable = (child.dataType, dataType) match {
     case (StringType, _: NumericType) => true
     case (StringType, TimestampType)  => true
+    case (DoubleType, TimestampType)  => true
+    case (FloatType, TimestampType)   => true
     case (StringType, DateType)       => true
     case (_: NumericType, DateType)   => true
     case (BooleanType, DateType)      => true
@@ -117,10 +119,18 @@ case class Cast(child: Expression, dataType: DataType) extends UnaryExpression w
       buildCast[Decimal](_, d => decimalToTimestamp(d))
     // TimestampWritable.doubleToTimestamp
     case DoubleType =>
-      buildCast[Double](_, d => decimalToTimestamp(Decimal(d)))
+      buildCast[Double](_, d => try {
+        decimalToTimestamp(Decimal(d))
+      } catch {
+        case _: NumberFormatException => null
+      })
     // TimestampWritable.floatToTimestamp
     case FloatType =>
-      buildCast[Float](_, f => decimalToTimestamp(Decimal(f)))
+      buildCast[Float](_, f => try {
+        decimalToTimestamp(Decimal(f))
+      } catch {
+        case _: NumberFormatException => null
+      })
   }
 
   private[this]  def decimalToTimestamp(d: Decimal) = {

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvaluationSuite.scala

@@ -450,6 +450,11 @@ class ExpressionEvaluationSuite extends FunSuite {
 
     // A test for higher precision than millis
     checkEvaluation(Cast(Cast(0.00000001, TimestampType), DoubleType), 0.00000001)
+
+    checkEvaluation(Cast(Literal(Double.NaN), TimestampType), null)
+    checkEvaluation(Cast(Literal(1.0 / 0.0), TimestampType), null)
+    checkEvaluation(Cast(Literal(Float.NaN), TimestampType), null)
+    checkEvaluation(Cast(Literal(1.0f / 0.0f), TimestampType), null)
   }
 
   test("null checking") {