Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/10133#discussion_r46966053
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
---
@@ -359,10 +359,27 @@ case class LambdaVariable(value: String, isNull:
String, dataType: DataType) ext
case class MapObjects(
function: AttributeReference => Expression,
inputData: Expression,
- elementType: DataType) extends Expression {
+ elementType: DataType)(
+ completeFunctionCopy: Option[Expression] = None) extends Expression {
- private lazy val loopAttribute = AttributeReference("loopVar",
elementType)()
- private lazy val completeFunction = function(loopAttribute)
+ lazy val completeFunction = completeFunctionCopy.getOrElse {
+ function(AttributeReference("loopVar", elementType)())
+ }
+
+ lazy val loopAttribute = completeFunction.collectFirst {
--- End diff --
Wow, that's a really tricky one, thanks a lot!
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