iRakson commented on a change in pull request #27759: [SPARK-31008][SQL]Support json_array_length function URL: https://github.com/apache/spark/pull/27759#discussion_r390368102
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala ########## @@ -781,3 +782,68 @@ case class SchemaOfJson( override def prettyName: String = "schema_of_json" } + +/** + * A function that returns the number of elements in outer JSON Array. + */ +@ExpressionDescription( + usage = "_FUNC_(jsonArray) - Returns the number of elements in outer JSON Array.", + arguments = """ + Arguments: + * jsonArray - A JSON array is required as argument. An Exception is thrown if any + other valid JSON strings are passed. `NULL` is returned in case of invalid JSON. Review comment: Won't it be good if we inform users that this function accepts JSON Array only? ---------------------------------------------------------------- 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: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
