I was expecting the json support, but SP-GiST is a very welcome surprise. http://www.postgresql.org/docs/9.2/static/spgist-intro.html http://www.postgresql.org/

I was expecting the json support, but SP-GiST is a very welcome surprise. http://www.postgresql.org/docs/9.2/static/spgist-intro.html http://www.postgresql.org/docs/9.2/static/spgist-intro.html User-extensible spacial index types. This makes Postgres perfect for online machine learning.