Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r85625648
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -234,7 +259,16 @@ case class CreateStruct(children: Seq[Expression])
extends Expression {
*/
// scalastyle:off line.size.limit
@ExpressionDescription(
- usage = "_FUNC_(name1, val1, name2, val2, ...) - Creates a struct with
the given field names and values.")
+ usage = "_FUNC_(name1, val1, name2, val2, ...) - Creates a struct with
the given field names and values.",
+ extended = """
+ Arguments:
+ name - a string expression literal that represents the field name.
+ val - an expression of any type.
--- End diff --
```sql
spark-sql> SELECT named_struct('1', array(1)), named_struct('1',
struct(1)), named_struct('1', map(1, 1));
{"1":[1]} {"1":{"col1":1}} {"1":{1:1}}
```
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