23.11.2017 04:45, support-tiger пишет:
> is there a way to update a single field in jsonb without replacing the
> entire json document - couldn't find an example
>
> for example
>
> create table test (id primary key, data jsonb);
>
> insert into test ({"name":"bill", "age":29});
>
> ?? update test set data->age = 30
>
>
When a record in PostgeSQL is UPDATEd, its new version is created. So
such partial JSON update would be not more than some syntax sugar. That
is why it is not yet implemented, though plans for that exist.
Now you have to do something like:
UPDATE test SET data = jsonb_set(data, ARRAY['age'], to_jsonb(30)) WHERE ..