From: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
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To: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
Cc: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Joey Adams <joeyadams3(dot)14159(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, Claes Jakobsson <claes(at)surfar(dot)nu>, Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr>, Magnus Hagander <magnus(at)hagander(dot)net>, Jan Urbański <wulczer(at)wulczer(dot)org>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org>, Jan Wieck <janwieck(at)yahoo(dot)com> |
Subject: | Re: JSON for PG 9.2 |
Date: | 2012-01-12 16:28:10 |
Message-ID: | 4F0F0A1A.5090509@dunslane.net |
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On 01/12/2012 11:21 AM, Merlin Moncure wrote:
> On Thu, Jan 12, 2012 at 9:51 AM, Andrew Dunstan<andrew(at)dunslane(dot)net> wrote:
>> On 01/12/2012 10:44 AM, Pavel Stehule wrote:
>>> this should be little bit more enhanced to support a row arrays - it
>>> can be merged with some routines from pst tool
>>> http://okbob.blogspot.com/2010/11/new-version-of-pst-collection-is.html
>> I will be covering composites.
> curious, will your function work on unregistered composites? What
> would this do?
>
> select array_to_json(array[row('a', 1), row('b', 2)]);
>
Expected behaviour is something like this:
andrew=# select q2json('
select $$a$$ || x as b,
y as c,
array[row(x.*,array[1,2,3]),
row(y.*,array[4,5,6])] as z
from generate_series(1,2) x,
generate_series(4,5) y');
[{"b":"a1","c":4,"z":[{"f1":1,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]},
{"b":"a1","c":5,"z":[{"f1":1,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]},
{"b":"a2","c":4,"z":[{"f1":2,"f2":[1,2,3]},{"f1":4,"f2":[4,5,6]}]},
{"b":"a2","c":5,"z":[{"f1":2,"f2":[1,2,3]},{"f1":5,"f2":[4,5,6]}]}]
cheers
andrew
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