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postgresql-hll

HyperLogLog extension for PostgreSQL

Description

This Postgres module introduces a new data type `hll` which is a HyperLogLog data structure. HyperLogLog is a **fixed-size**, set-like structure used for distinct value counting with tunable precision. For example, in 1280 bytes `hll` can estimate the count of tens of billions of distinct values with only a few percent error.

In addition to the algorithm proposed in the original paper, this implementation is augmented to improve its accuracy and memory use without sacrificing much speed.

The full description can be found at https://github.com/aggregateknowledge/postgresql-hll/blob/master/README.markdown

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Homepage

https://github.com/aggregateknowledge/postgresql-hll


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1169 other people were interested in this package here. The newest known version of this software is 2.7-2.1 (Information last updated about 17 hours ago.)