Re: strip nulls functions for json and jsonb - Mailing list pgsql-hackers

On 10/26/2014 04:14 PM, Thom Brown wrote:
> On 26 October 2014 20:07, Andrew Dunstan <andrew@dunslane.net 
> <mailto:andrew@dunslane.net>> wrote:
>
>
>     On 10/26/2014 03:50 PM, Pavel Stehule wrote:
>
>         Hi
>
>         I have a question,
>
>         what is expected result of null strip of
>
>         {"a": {"b": null, "c", null"} }
>
>         ?
>
>
>
>     Please remember not to top-post.
>
>     The above is not legal json, so the answer would be an error.
>
>
> I believe Pavel means:
>
> {"a": {"b": null, "c": null} }

This is the expected result:
   andrew=# select json_strip_nulls('{"a": {"b": null, "c": null} }');     json_strip_nulls   ------------------
{"a":{}}  (1 row)
 


It is NOT expected that we replace an empty object with NULL (and then 
strip it if it's a field value of an outer level object).

cheers

andrew