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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