Cannot SELECT from UPDATE RETURNING clause in postgres

Question

I isolatet the problem from a much more complex query. Here the test scenario

DROP TABLE test; 
CREATE TABLE test (
  id integer,
  description varchar(100)
         


        

Answer 1

You update two rows in your UPDATE query, add a WHERE clause to restrict the rows affected.

UPDATE test SET description = 'test' WHERE id = 1 RETURNING id

to return a single row.