Distinct
Javadoc
Produces a collection containing distinct elements of the input collection.
On some data sets, it might be more efficient to compute an approximate
answer using ApproximateUnique, which also allows for determining distinct
values for each key.
Examples
See BEAM-7703 for updates.
Related transforms
- Count counts the number of elements within each aggregation.
- ApproximateUnique estimates the number of distinct elements in a collection.