On 2014-06-17 19:22:07 -0400, Tom Lane wrote: > Andrew Dunstan <and...@dunslane.net> writes: > > I went to have a look at documenting the jsonb comparison operators, and > > found that the docs on comparison operators contain this: > > > Comparison operators are available for all relevant data types. > > > They neglect to specify further, however. This doesn't seem very > > satisfactory. How is a user to know which are relevant? I know they are > > not available for xml and json, but are for jsonb. Just talking about > > "all relevant types" seems rather hand-wavy. > > Well, there are 38 default btree opclasses in the standard system ATM. > Are we worried enough about this to list them all explicitly? Given the > lack of complaints to date, I'm not. > > However, if we try to fudge it by saying something like "available for > all data types for which there is a natural linear order", I'm not > sure that that's 100% true; and it's certainly not complete, since > for instance jsonb's ordering is rather artificial, and the area-based > orderings of the built-in geometric types are even more so.
It's not true for e.g. xid (which is rather annoying btw). Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers