On 03/08/2012 02:16 PM, Tom Lane wrote:
"David E. Wheeler"<da...@justatheory.com> writes:
CREATE OPERATOR CLASS json_ops
DEFAULT FOR TYPE JSON USING btree AS
OPERATOR 3 = (json, json),
FUNCTION 1 json_cmp(json, json);
This seems to work.
Urk. You really ought to provide the whole opclass (all 5 operators).
I'm not sure what will blow up if you leave it like that, but it won't
be pretty.
Yeah. Note too that this is at best dubious:
CREATE OR REPLACE FUNCTION json_cmp(
json,
json
) RETURNS INTEGER LANGUAGE SQL STRICT IMMUTABLE AS $$
SELECT bttextcmp($1::text, $2::text);
$$;
Two pieces of JSON might well be textually different but semantically
identical (e.g. by one having additional non-semantic whitespace).
cheers
andrew
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
