I just created sections in the SGML manual chapters about GIST, GIN, and SP-GIST to hold documentation about the standard opclasses provided for them:
http://www.postgresql.org/docs/devel/static/gist-builtin-opclasses.html http://www.postgresql.org/docs/devel/static/gin-builtin-opclasses.html http://www.postgresql.org/docs/devel/static/spgist-builtin-opclasses.html We never had any well-defined place to discuss such opclasses before, but I think it's past time we did. I envision these sections as places to document, for example, the difference between the two jsonb gin opclasses. I put this text in about that: Of the two operator classes for type jsonb, jsonb_ops is the default. jsonb_hash_ops supports fewer operators but will work with larger indexed values than jsonb_ops can support. Is that accurate? Do we need to say more? For the moment what's there is mostly just tables of the core opclasses and the operators they support. If anyone can think of specific additions that should be there, please send in patches. (BTW, I didn't worry about btree and hash because they don't have such a wide variety of opclass behaviors.) regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
