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Re: JSON for PG 9.2

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
Cc: 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>, Merlin Moncure <mmoncure(at)gmail(dot)com>, 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: 2012-01-15 16:08:05
Message-ID: 4F12F9E5.3090801@dunslane.net (view raw or flat)
Thread:
Lists: pgsql-hackers

On 01/14/2012 03:06 PM, Andrew Dunstan wrote:
>
>
>
> OK, here's a patch that does both query_to_json and array_to_json, 
> along with docs and regression tests. It include Robert's original 
> patch, although I can produce a differential patch if required. It can 
> also be pulled from <https://bitbucket.org/adunstan/pgdevel>
>
>


Here's an update that adds row_to_json, plus a bit more cleanup. Example:


    andrew=# SELECT row_to_json(q)
    FROM (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) q;
                                 row_to_json
    --------------------------------------------------------------------
      {"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]}]}
    (4 rows)


(This might be more to Robert's taste than query_to_json() :-) )

cheers

andrew



Attachment: adjson3.patch
Description: text/x-patch (53.5 KB)

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