iRakson commented on a change in pull request #27836: [SPARK-31009][SQL] Support json_object_keys function URL: https://github.com/apache/spark/pull/27836#discussion_r403866854
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala ########## @@ -796,3 +797,74 @@ case class SchemaOfJson( override def prettyName: String = "schema_of_json" } + +/** + * A function which returns all the keys of the outmost JSON object. + */ +@ExpressionDescription( + usage = "_FUNC_(json_object) - returns all the keys of the outmost JSON object as an array.", + arguments = """ + Arguments: + * json_object - A JSON object. If a valid JSON object is given, all the keys of the outmost + object will be returned as an array. If it is an invalid JSON string, the function + returns null. If it is a JSON array or empty string, an illegal argument exception + will be thrown. Review comment: For invalid JSON we are returning `NULL` in all the other json functions. So for that i kept it like that. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
