cardinality: Constructs a cardinality aggregator for the given Druid columns

Description

Constructs a cardinality aggregator for the given Druid columns

Usage

cardinality(name, fieldNames, byRow = F)

Arguments

fieldNames

list of Druid columns

byRow

setting byRow to false (the default) it computes the cardinality of the set composed of the union of all dimension values for all the given dimensions