Github user maropu commented on a diff in the pull request: https://github.com/apache/spark/pull/16981#discussion_r101971506 --- 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 -- I checked related code though, if we use `named_struc` here, we need to add substantial code to convert `named_struct` to `StructType`...
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