output.txt

CREATE TABLE
INSERT 0 2
 x 
---
 4
 5
(2 rows)

 x 
---
 4
 5
(2 rows)

silly.sql

create table foo (x int not null);
insert into foo (x) values (3),(4);

with recursive updater as (
  update foo
  set x=x+1
  where x<10
  returning *
) select * from updater;

select * from foo;