postgresql extension to convert between different units

why

• learning/experimenting with writing psql extensions

installation

• git clone https://github.com/freevryheid/units.git
• cd units
• sudo make install
• psql
• create extension units;
• select unitsconvert(1,'mile',meter');

uninstall

• psql
• drop extension units;
• \q
• sudo rm /usr/share/postgresql/extension/units*

license

• none