Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/20753#discussion_r173064355 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala --- @@ -133,8 +134,21 @@ case class StaticInvoke( override def nullable: Boolean = needNullCheck || returnNullable override def children: Seq[Expression] = arguments - override def eval(input: InternalRow): Any = - throw new UnsupportedOperationException("Only code-generated evaluation is supported.") + override def eval(input: InternalRow): Any = { + if (staticObject == null) { + throw new RuntimeException("The static class cannot be null.") + } + + val parmTypes = arguments.map(e => + CallMethodViaReflection.typeMapping.getOrElse(e.dataType, + Seq(e.dataType.asInstanceOf[ObjectType].cls))(0)) + val parms = arguments.map(e => e.eval(input).asInstanceOf[Object]) + val method = staticObject.getDeclaredMethod(functionName, parmTypes : _*) --- End diff -- Looks like we can also move `getDeclaredMethod` outside `eval`?
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