kiszk commented on a change in pull request #25728: [SPARK-29020][SQL] Improving array_sort behaviour URL: https://github.com/apache/spark/pull/25728#discussion_r347151914
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala ########## @@ -285,6 +286,113 @@ case class ArrayTransform( override def prettyName: String = "transform" } +/** + * Sorts elements in an array using a comparator function. + */ +// scalastyle:off line.size.limit +@ExpressionDescription( + usage = """_FUNC_(expr, func) - Sorts the input array in ascending order. The elements of the + input array must be orderable. Null elements will be placed at the end of the returned + array. Since 3.0.0 also sorts and returns the array based on the given + comparator function. The comparator will take two arguments + representing two elements of the array. + It returns -1, 0, or 1 as the first element is less than, equal to, or greater + than the second element. If the comparator function returns other + values (including NULL), the query will fail and raise an error. Review comment: nit: `query` -> `function`? ---------------------------------------------------------------- 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]
