Count Distinct

Aggregator counting distinct values

Processing

Distinct subjects are counted.

If no subjects are processed, the aggregation result is 0

Name Type Description

Name	Type	Description
Nil Handling	string	Defines how to handle `nil` values: ignore: skips `nil` values process: counts `nil` values
NaN Handling	string	Defines how to handle `NaN` values: ignore: skips `NaN` values process: counts `NaN` values

string

Defines how to handle nil values:

string

Defines how to handle NaN values:

This expression evaluates to a dict of the form:

{
  :init any,
  :acc function,
  :out function
}

The supplied values are consistent with aggregation semantics of the Group By step.