We’re happy to announce the first open-source release of AK’s PostgreSQL extension for building and manipulating HyperLogLog data structures in SQL, postgresql-hll. We are releasing this code under the Apache License, Version 2.0 which we feel is an excellent balance between permissive usage and liability limitation. What is it and what can I do with it? The extension introduces a new data type, h
![Open Source Release: postgresql-hll –](https://cdn-ak-scissors.b.st-hatena.com/image/square/5af5dd2ada501b220b9ee21a4a03a0d56200721d/height=288;version=1;width=512/https%3A%2F%2Fagkn.files.wordpress.com%2F2013%2F01%2Funiquesovertime.png)