PostgreSQL更新表时时间戳不会自动更新的解决方法_PostgreSQL_

 create table ab ( id int, changetimestamp timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP );

 create or replace function upd_timestamp() returns trigger as $$ begin new.modified = current_timestamp; return new; end $$ language plpgsql; drop table if exists ts; create table ts ( id bigserial primary key, tradeid integer , email varchar(50), num integer, modified timestamp default current_timestamp ); create trigger t_name before update on ts for each row execute procedure upd_timestamp(); 

 insert into ts (tradeid,email,num) values (1223,'mike_zhang@live.com',1); update ts set email='Mike_Zhang@live' where tradeid = 1223 ; create unique index ts_tradeid_idx on ts(tradeid); insert into ts(tradeid,email,num) values (1223,'Mike_Zhang@live.com',2) on conflict(tradeid) do update set email = excluded.email,num=excluded.num; select * from ts; -- delete from ts;