This extension is actually a fork of shatypes[1] which adds some other data types as crc32 and provides some fixes to original implementations. This project is a continuation of the project formerly at https://github.com/infofarmer/hashtypes. Many thanks to Andrey Ropp, Infofarmer, and others for their work and support on the transition.[2] [1]: http://pgfoundry.org/projects/shatypes [2]: pandrewhk#7