Skip column name from json output

[zagzag999]

Will it be possible that the output be only a json array of the values?
I'm doing:
select col from table;

I don't want to get json array [{"col": "val1"}, {"col": "val2"} ...]
Instead I want to skip col an get ["val1", "val2"]

In similar scenario the col is already a json string in the mySql DB.
The output for:
select json from table;

returns values like
["json": "{"id":1, "name": "test"}"]
and preferably it would have been:
[{"id":1,"name","test"}]

Is there a different nginx module to achieve such ?