Date: Thu, 17 Oct 2019 10:42:16 +0900
From: Michael Paquier <michael@paquier.xyz>
To: ameenahsanma@gmail.com, pgsql-docs@lists.postgresql.org
Subject: Re: Table 9-40. json and jsonb Operators - Data could be more
 informative
Message-ID: <20191017014216.GE5605@paquier.xyz>
References: <157111158709.25314.5025115144658634556@wrigleys.postgresql.org>
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On Tue, Oct 15, 2019 at 03:53:07AM +0000, PG Doc comments form wrote:
> the table 9.40, json and jsonb operators=20
> lists '->>' and '#>>' operators and the difference written is the second =
one
> go to the specific location.
>=20
> I am not an expert in postgres!
> But from my experience,
> '#>>'  can also parse the data when it is a stringified JSON, having esca=
pe
> charterers in it!

Input is always welcome, thanks!

> for ex :
> for a scalar value in jsonb : "{\"attr\":\"value\"}", from which we cannot
> read keys or values as such,
>=20
> Query : select (column #>> '{}') from table;
> will give parsed json : {"attr" : "value"} from which keys and values can=
 be
> extracted.
>=20
> please mention is there if it is right, as i struggled a lot to figure it
> out!
>=20
> PS: pardon my language, and my concern if it is not right!

Perhaps this could be improved.  How would you shape that as a patch?
=46rom the source tree you would need to change the table around the
section "Processing and Creating JSON Data" in src/sgml/func.sgml.
--
Michael

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