postgresql 设置主键自增

dlnu_workload=# CREATE SEQUENCE event_id_seq  
START WITH 1  
INCREMENT BY 1  
NO MINVALUE  
NO MAXVALUE  
CACHE 1;  

alter table depart_state alter column depart_id set default nextval('event_id_seq');  

需要更改的是 depart_state 和 depart_id