On Tue, Apr 8, 2014 at 2:46 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Well, let me see if I understand the situation correctly: > > * jsonb_ops supports more operators > > * jsonb_hash_ops produces smaller, better-performing indexes > > * jsonb_ops falls over on inputs with wide field values, but > jsonb_hash_ops does not
There might be some compelling cases for indexing existence rather than containment, since the recheck flag isn't set there, but in general this summary seems sound. I would say that broadly, existence is a less useful operator than containment, and so jsonb_hash_ops is broadly more compelling. I didn't propose changing the default due to concerns about the POLA, but I'm happy to be told that those concerns were out of proportion to the practical benefits of a different default. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
