each_top_k(int K, Object group, double cmpKey, *) – Returns top-K values (or tail-K values when k is less than 0)
Platforms: WhereOS, Spark, Hive
More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.
View the complete guide of WhereOS functions.