Обсуждение: Table 9-40. json and jsonb Operators - Data could be more informative

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/9.4/functions-json.html
Description:

In https://www.postgresql.org/docs/9.4/functions-json.html,

the table 9.40, json and jsonb operators 
lists '->>' and '#>>' operators and the difference written is the second one
go to the specific location.

I am not an expert in postgres!
But from my experience,
'#>>'  can also parse the data when it is a stringified JSON, having escape
charterers in it! 

for ex :
for a scalar value in jsonb : "{\"attr\":\"value\"}", from which we cannot
read keys or values as such,

Query : select (column #>> '{}') from table;
will give parsed json : {"attr" : "value"} from which keys and values can be
extracted.

please mention is there if it is right, as i struggled a lot to figure it
out!

PS: pardon my language, and my concern if it is not right!

Thank you!

On Tue, Oct 15, 2019 at 03:53:07AM +0000, PG Doc comments form wrote:
> the table 9.40, json and jsonb operators
> lists '->>' and '#>>' operators and the difference written is the second one
> go to the specific location.
>
> I am not an expert in postgres!
> But from my experience,
> '#>>'  can also parse the data when it is a stringified JSON, having escape
> 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,
>
> Query : select (column #>> '{}') from table;
> will give parsed json : {"attr" : "value"} from which keys and values can be
> extracted.
>
> please mention is there if it is right, as i struggled a lot to figure it
> out!
>
> 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?
From the source tree you would need to change the table around the
section "Processing and Creating JSON Data" in src/sgml/func.sgml.
--
Michael