Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/15513#discussion_r85625439 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala --- @@ -28,7 +28,15 @@ import org.apache.spark.unsafe.types.UTF8String * Returns an Array containing the evaluation of all children expressions. */ @ExpressionDescription( - usage = "_FUNC_(n0, ...) - Returns an array with the given elements.") + usage = "_FUNC_(expr, ...) - Returns an array with the given elements.", + extended = """ + Arguments: + expr - an expression of any type. --- End diff -- ```sql spark-sql> SELECT array(array(1)), array(struct(1)), array(map(1, 1)); [[1]] [{"col1":1}] [{1:1}] ```
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