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