Re: Initial Review: JSON contrib modul was: Re: Another swing at JSON

On 23/07/11 01:12, Robert Haas wrote:
> On Fri, Jul 22, 2011 at 6:04 PM, Joey Adams <joeyadams3.14159@gmail.com> wrote:
>> On another matter, should the JSON type guard against duplicate member
>> keys?  The JSON RFC says "The names within an object SHOULD be
>> unique," meaning JSON with duplicate members can be considered valid.
>> JavaScript interpreters (the ones I tried), PHP, and Python all have
>> the same behavior: discard the first member in favor of the second.
>> That is, {"key":1,"key":2} becomes {"key":2}.  The XML type throws an
>> error if a duplicate attribute is present (e.g. '<a href="b"
>> href="c"/>'::xml).
> 
> Hmm.  That's tricky.  I lean mildly toward throwing an error as being
> more consistent with the general PG philosophy.

OTOH:

regression=# select 'key=>1,key=>2'::hstore;  hstore
------------"key"=>"1"
(1 row)

Cheers,
Jan