adaptive_estimator
1.3.3
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



bitmap_estimator
1.3.5
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



count_distinct
1.3.2

Aggregate for computing number of distinct values using a hash table. 



financial
1.0.1

Financial aggregate functions 



hyperloglog_estimator
1.2.6
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



json_enhancements
1.0.2

Backport of pg 9.3 JSON enhancements to PostgreSQL 9.2 



loglog_estimator
1.2.4
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



pcsa_estimator
1.3.3
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



probabilistic_estimator
1.3.3
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



quantile
1.1.5

Aggregate for computing various quantiles (median, quartiles etc.) efficiently. 



superloglog_estimator
1.2.3
(testing)

Estimates number of distinct elements in a data set (aggregate and a data type). 



trimmed_aggregates
1.3.2

Aggregate for computing trimmed avg/stddev/var (with outliers removed). 


