popcnt


popcnt(a [, b]) – Returns a popcount value

select
popcnt(3),
popcnt(“3”), — 3=0x11
popcnt(array(1,3));

2 2 3

Platforms: WhereOS, Spark, Hive
Class: hivemall.knn.distance.PopcountUDF

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.

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