create table test_online(a int, b int, c serial) tablespace hdfs_ts;
insert into test_online select v ,v*10, v*100 from generate_series(1, 20) as v; 
alter table test_online drop column b;
select * from test_online order by 1;


create table test_online_like(like test_online INCLUDING STORAGE INCLUDING DISTRIBUTION) tablespace hdfs_ts;
\d+ test_online
\d+ test_online_like
select attname, atttypid, attnum from pg_attribute where attrelid='test_online'::regclass order by 1,2,3;
select attname, atttypid, attnum from pg_attribute where attrelid='test_online_like'::regclass order by 1,2,3;

select gs_switch_relfilenode(E'test_online','test_online_like');

select * from test_online_like order by 1;

drop table test_online cascade;
drop table test_online_like cascade;