select current_user \gset
create user columnar_user;
NOTICE:  not propagating CREATE ROLE/USER commands to worker nodes
HINT:  Connect to worker nodes directly to manually create all necessary users and roles.
\c - columnar_user
create table columnar_permissions(i int) using columnar;
insert into columnar_permissions values(1);
alter table columnar_permissions add column j int;
insert into columnar_permissions values(2,20);
vacuum columnar_permissions;
truncate columnar_permissions;
drop table columnar_permissions;
\c - :current_user