[ANNOUNCE] postgresql-unit 3 released

postgresql-unit 3 released
--------------------------

The PostgreSQL "unit" extension provides a datatype for values using
the SI base types, and Bytes.

Highlight in version 3 of the extension is the ability to define new
prefixes and units at run-time using database tables, and the vast
number of predefined prefixes and units imported from the GNU "unit"
tool. Over 2400 units are available now.


Example for a user-defined unit:

# INSERT INTO unit_units VALUES ('legobrick', '9.6 mm');
# SELECT '1 m'::unit @ 'legobricks' AS one_meter;
          one_meter
-----------------------------
 104.166666666667 legobricks


Changelog:

* Support defining new units at runtime.
* Import unit definitions from GNU units.
* Add sqrt() and cbrt() functions.
* Extension is not relocatable after installation anymore.
* Bump extension version to 3.
* Bump minimum supported PostgreSQL version to 9.5 so we can use
  hash_create(HASH_BLOBS).
* Bump license to GPL-3+ to match GNU units' license.


Homepage: https://github.com/ChristophBerg/postgresql-unit


Christoph
--
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