Somewhat out of date: in 9.2 there is a built-in JSON data type that is complete and committed. It doesn't have very many operators, though, intended to be use

Somewhat out of date: in 9.2 there is a built-in JSON data type that is complete and committed. It doesn't have very many operators, though, intended to be used with some integrated procedural language like plv8 or plperl or whathaveyou.