Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/16981#discussion_r101968164
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
---
@@ -482,6 +482,15 @@ case class JsonTuple(children: Seq[Expression])
/**
* Converts an json input string to a [[StructType]] with the specified
schema.
*/
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+ usage = "_FUNC_(jsonStr, schema[, options]) - Returns a struct value
with the given `jsonStr` and `schema`.",
+ extended = """
+ Examples:
+ > SELECT _FUNC_('{"a":1}', '{"type":"struct", "fields":[{"name":"a",
"type":"integer", "nullable":true}]}');
--- End diff --
@gatorsmile, do you mind if I ask to elaborate what you think wtih
`named_struct`? I am just curious.
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