Re: strip nulls functions for json and jsonb

On 10/26/2014 04:14 PM, Thom Brown wrote:
> On 26 October 2014 20:07, Andrew Dunstan <andrew(at)dunslane(dot)net
> <mailto:andrew(at)dunslane(dot)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