Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/16608#discussion_r96324395 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala --- @@ -508,4 +511,12 @@ object FunctionRegistry { new ExpressionInfo(clazz.getCanonicalName, name) } } + private def expressionGeneratorOuter[T <: Generator : ClassTag] + (name: String): (String, (ExpressionInfo, FunctionBuilder)) = { + val regularGen = expression[T](name) + val outerBuilder = (args: Seq[Expression]) => { + GeneratorOuter(regularGen._2._2(args).asInstanceOf[Generator]) + } + (name, (expressionInfo[GeneratorOuter](name), outerBuilder)) --- End diff -- Let's use the generators info instead of the outer generator info.
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