postgresql-hll - HyperLogLog extension for PostgreSQL

Distribution: Ubuntu 16.04 LTS (Xenial Xerus)
Repository: Ubuntu Universe amd64
Package name: postgresql-hll
Package version: 2.7
Package release: 2.1
Package architecture: amd64
Package type: deb
Installed size: 121 B
Download size: 28.04 KB
Official Mirror:
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




    Source package: postgresql-hll

    Install Howto

    1. Update the package index:
      # sudo apt-get update
    2. Install postgresql-hll deb package:
      # sudo apt-get install postgresql-hll


    • /usr/lib/postgresql/9.4/lib/
    • /usr/share/doc/postgresql-hll/README.markdown.gz
    • /usr/share/doc/postgresql-hll/changelog.Debian.gz
    • /usr/share/doc/postgresql-hll/copyright
    • /usr/share/postgresql/9.4/extension/hll--1.0.sql
    • /usr/share/postgresql/9.4/extension/hll.control


    2014-10-30 - YunQiang Su <> postgresql-hll (2.7-2.1) unstable; urgency=low * Non-maintainer upload. * Don't include postgresql-common makefile (Closes: 738376) * Add inline with _forceinline. * Use source format 3.

    2013-04-13 - Cyril Bouthors <> postgresql-hll (2.7-2) unstable; urgency=low * Removed useless sentence in the package description (Closes: #705300). Thanks to Jonas Smedegaard for pointing this out.

    2013-02-21 - Cyril Bouthors <> postgresql-hll (2.7-1) unstable; urgency=low * Initial release (Closes: #701101).