Call row_to_json(row) on any PostgreSQL statement (even statements that don't return a result)

Question

I\'m looking for query to always return the JSON representation from PostgreSQL statement, even if there\'s no returning *. Here\'s an example:

WITH         


        

Answer 1

I think the problem doesn't have anything to do with your usage of row_to_json, but rather trying to embed an INSERT statement into a CTE. The following code ran without problem on my Postgres:

WITH result AS (VALUES ('matt', 33), ('drew', 42))
select row_to_json(row) from result as row;

which output this:

"{"column1":"matt","column2":33}"
"{"column1":"drew","column2":42}"

You should either use CTE without INSERT, or first make the INSERT into your users table and then create the CTE afterwards.

Answer 2

Use returning to get results of insert statement:

with result as (
    insert into users("name", age) 
    values('drew', 42)
    returning *
)
select row_to_json(row) 
from result as row;