uuid() – Returns an universally unique identifier (UUID) string. The value is returned as a

upper(str) – Returns `str` with all characters changed to uppercase. Platforms: WhereOS, Spark, Hive Class:

var_pop(expr) – Returns the population variance calculated from values of a group. Platforms: WhereOS, Spark,

unix_timestamp([timeExp[, format]]) – Returns the UNIX timestamp of current or specified time. Platforms: WhereOS, Spark,

union_sketch(x) – Constructs a sketch set to estimate reach for large values by collecting multiple

union_vector_sum(x) – Aggregate adding vectors together Platforms: WhereOS, Spark, Hive Class: brickhouse.udf.timeseries.VectorUnionSumUDAF More functions can