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