[aaronem]

Also of note is that stored procedures are supported in a variety of languages, including Javascript, so it's quite easy to handle cases where the surprisingly broad range of core JSON functions and operators [1] doesn't include what you need.

PostgreSQL has also recently added a key-value store type [2] with semantics reminiscent of Redis. The impression I get is that they're gunning for the NoSQL kids in general, and this pleases me; while I grant it is sometimes possible and necessary to obtain new insight in a field by ignoring all that's gone before, I very much doubt this is one of those times, and I am therefore delighted to see a properly engineered database engine gain more or less the entirety of the features which draw interest to the NoSQL crowd in the first place.

[1] http://www.postgresql.org/docs/9.3/static/functions-json.htm... [2] http://www.postgresql.org/docs/9.3/static/hstore.html

[chris_wot]

That is extremely interesting. So it looks like you can store a JSON type as well as a KV datatype in Postgres! And it looks like it is relatively easy to convert between the two.

This leaves only performance. I think I'm still confused around this area - why do people say that non-relational technologies like MongoDB are faster than relational databases?