agora inbox for pgsql-sql@postgresql.org
help / color / mirror / Atom feedFrom: Hector Menchaca <hm34306@hotmail.com>
To: David G Johnston <david.g.johnston@gmail.com>
To: pgsql-sql@postgresql.org <pgsql-sql@postgresql.org>
Subject: Re: postgres json: How to query map keys to get children
Date: Sat, 23 Aug 2014 18:38:39 -0500
Message-ID: <BAY178-W418B5250FE53F5D2D6514DF8D10@phx.gbl> (raw)
In-Reply-To: <1408825132229-5816009.post@n5.nabble.com>
References: <BAY178-W513E01F52C8A4324953A74F8D10@phx.gbl>
<1408825132229-5816009.post@n5.nabble.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-sql>
Perfect your snippet gave me some clues...
It looks as follows:
SELECT json_array_elements(skill_type.Skill->'value')->>'Name' as NameFROM ( SELECT to_json(json_each(ResourceDocument->'Skill')) as Skill FROM testdepot.Resource) skill_type
to_json returns a key value map which you then use to get to the json array
Thanks for the lead :)
> Date: Sat, 23 Aug 2014 13:18:52 -0700
> From: david.g.johnston@gmail.com
> To: pgsql-sql@postgresql.org
> Subject: Re: [SQL] postgres json: How to query map keys to get children
>
> Hector Menchaca wrote
> > json_array_elements(ResourceDocument->'Skill'->*)
>
> NOT TESTED (or complete)
>
> SELECT skill_type.value->'Name'
> FROM (
> SELECT * FROM json_each(rd->'Skill')
> ) skill_type
>
> Because you want columns for Name, etc, you must list those explicitly
> instead of using json_each over those.
>
> David J.
>
>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/postgres-json-How-to-query-map-keys-to-get-children-tp581600...
> Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
>
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql
=
view thread (3+ messages)
Message-ID: <BAY178-W418B5250FE53F5D2D6514DF8D10@phx.gbl>
Permalink: ../BAY178-W418B5250FE53F5D2D6514DF8D10@phx.gbl/
Also on: postgresql.org/message-id/BAY178-W418B5250FE53F5D2D6514DF8D10@phx.gbl
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: hm34306@hotmail.com, david.g.johnston@gmail.com
Subject: Re: postgres json: How to query map keys to get children
In-Reply-To: <BAY178-W418B5250FE53F5D2D6514DF8D10@phx.gbl>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox