Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/21037#discussion_r182297896
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
---
@@ -353,3 +353,61 @@ case class ArrayMax(child: Expression) extends
UnaryExpression with ImplicitCast
override def prettyName: String = "array_max"
}
+
+
+/**
+ * Returns the position of the first occurrence of element in the given
array as long.
+ * Returns 0 if substr could not be found in str. Returns null if either
of the arguments are null
--- End diff --
`Returns 0 if substr could not be found in str` -> `Returns 0 if the value
could not be found in the array` or something?
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