On 02/26/2014 07:02 AM, Merlin Moncure wrote:
> On Tue, Feb 25, 2014 at 3:57 PM, Hannu Krosing <ha...@2ndquadrant.com> wrote:
>> It is not in any specs, but nevertheless all major imlementations do it and
>> some code depends on it.
>> IIRC, this behaviour is currently also met only by json and not by jsonb.
> Yes: This was the agreement that was struck and is the main reason why
> there are two json types, not one.  JSON does not guarantee field
> ordering as I read the spec and for the binary form ordering is not
> maintained as a concession to using the hstore implementation.

Actually, that's not true; neither Mongo/BSON nor CouchDB preserve field
ordering.  So users who are familiar with JSONish data *storage* should
be aware that field ordering is not preserved.

Josh Berkus
PostgreSQL Experts Inc.

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