Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17222#discussion_r116144809
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala ---
@@ -491,20 +491,42 @@ class UDFRegistration private[sql] (functionRegistry:
FunctionRegistry) extends
case 21 => register(name, udf.asInstanceOf[UDF20[_, _, _, _,
_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
case 22 => register(name, udf.asInstanceOf[UDF21[_, _, _, _,
_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
case 23 => register(name, udf.asInstanceOf[UDF22[_, _, _, _,
_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
- case n => logError(s"UDF class with ${n} type arguments is not
supported ")
+ case n =>
+ throw new IOException(s"UDF class with ${n} type arguments
is not supported.")
--- End diff --
why IOException?
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