Question

Does anyone know how to create index on JSON data in PostgreSQL 9.2?

Example data:

[
  {"key" : "k1", "value" : "v1"},
  {"key" : "k2", "value" : "v2"}
]

Say if I want to index on all the keys how to do that?

Thanks.

Answer 1

You are much better off using hstore for indexed fields, at least for now.

CREATE INDEX table_name_gin_data ON table_name USING GIN(data);

You can also create GIST indexes if you are interested in fulltext search. More info here: http://www.postgresql.org/docs/9.0/static/textsearch-indexes.html