cloud-fan commented on a change in pull request #35352:
URL: https://github.com/apache/spark/pull/35352#discussion_r829720960
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
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@@ -2095,10 +2095,12 @@ case class ArrayPosition(left: Expression, right:
Expression)
case class ElementAt(
left: Expression,
right: Expression,
+ // The value to return if index is out of bound
+ defaultValueOutOfBound: Expression = null,
Review comment:
The type can be `Literal` to be more type-safe
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