Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/20797#discussion_r177487244
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
---
@@ -266,8 +266,31 @@ case class Invoke(
override def nullable: Boolean = targetObject.nullable || needNullCheck
|| returnNullable
override def children: Seq[Expression] = targetObject +: arguments
- override def eval(input: InternalRow): Any =
- throw new UnsupportedOperationException("Only code-generated
evaluation is supported.")
+ override def eval(input: InternalRow): Any = {
--- End diff --
Since `obj` should be evaluated at each call of `eval`, it is hard to reuse
method resolution logic in `StaticInvoke`. On the other hand, we can reuse
logic for casting a return value.
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