-- 设置会话时区
SET TIME ZONE 'Asia/Shanghai';

-- msg_time 是 timestamptz类型
select msg_time from msg where id = 1;
select msg_time AT TIME ZONE 'Asia/Shanghai' from msg where id = 1;
select msg_time AT TIME ZONE 'UTC+8' from msg where id = 1;

SELECT to_timestamp(1761850339);
SELECT to_timestamp(1761850339) AT TIME ZONE 'Asia/Shanghai';