Package org.elasticsearch.search.aggregations.metrics.cardinality

Interface Summary

Interface	Description
Cardinality	An aggregation that computes approximate numbers of unique terms.

Class Summary

Class	Description
CardinalityAggregationBuilder
CardinalityAggregator	An aggregator that computes approximate counts of unique values.
CardinalityAggregatorFactory
HyperLogLogPlusPlus	Hyperloglog++ counter, implemented based on pseudo code from http://static.googleusercontent.com/media/research.google.com/fr//pubs/archive/40671.pdf and its appendix https://docs.google.com/document/d/1gyjfMHy43U9OWBXxfaeG-3MjGzejW1dlpyMwEYAAWEI/view?fullscreen This implementation is different from the original implementation in that it uses a hash table instead of a sorted list for linear counting.
InternalCardinality
ParsedCardinality