Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/21025#discussion_r180422191
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
---
@@ -287,3 +287,70 @@ case class ArrayContains(left: Expression, right:
Expression)
override def prettyName: String = "array_contains"
}
+
+
+/**
+ * Returns the minimum value in the array.
+ */
+@ExpressionDescription(
+usage = "_FUNC_(array) - Returns the minimum value in the array.",
+examples = """
+ Examples:
+ > SELECT _FUNC_(array(1, 20, null, 3));
+ 1
+ """, since = "2.4.0")
--- End diff --
indentation ..
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