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concat(col1, col2, …, colN) – Returns the concatenation of col1, col2, …, colN. Platforms: WhereOS,

combine(a,b) – Returns a combined list of two lists, or a combined map of two

combine_hyperloglog(x) – Combined two HyperLogLog++ binary blobs. Platforms: WhereOS, Spark, Hive Class: brickhouse.udf.hll.CombineHyperLogLogUDF More functions

combine_previous_sketch(grouping, map) – Returns a map of the combined keys of previous calls to this

collect_list(expr) – Collects and returns a list of non-unique elements. Platforms: WhereOS, Spark, Hive Class:

collect_max(x, val, n) – Returns an map of the max N numeric values in the