[spark-sql] a better exception message than "scala.MatchError" for unsupported...

[spark-sql] a better exception message than "scala.MatchError" for unsupported types in Schema creation

Currently if trying to register an RDD (or DataFrame in 1.3) as a table that has types that have no supported Schema representation (e.g. type "Any") - it would throw a match error. e.g. scala.MatchError: Any (of class scala.reflect.internal.Types$ClassNoArgsTypeRef)

This fix is just to have a nicer error message than a MatchError

Author: Eran Medan <ehrann.mehdan@gmail.com>

Closes #5235 from eranation/patch-2 and squashes the following commits:

af4b1a2 [Eran Medan] Line should be under 100 chars
0c69e9d [Eran Medan] Change from sys.error UnsupportedOperationException
524be86 [Eran Medan] better exception than scala.MatchError: Any

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala

@@ -179,6 +179,8 @@ trait ScalaReflection {
       case t if t <:< definitions.ShortTpe => Schema(ShortType, nullable = false)
       case t if t <:< definitions.ByteTpe => Schema(ByteType, nullable = false)
       case t if t <:< definitions.BooleanTpe => Schema(BooleanType, nullable = false)
+      case other =>
+        throw new UnsupportedOperationException(s"Schema for type $other is not supported")
     }
   }