PostgreSQL 如何修改时区

例如要将默认的PRC修改为UTC
可以从几个方面来修改
1. 全局参数
postgresql.conf
timezone='UTC'

2. 数据库级配置
alter database dbname set timezone='UTC';

pipeline=# select * from pg_db_role_setting ;
 setdatabase | setrole |              setconfig               
-------------+---------+--------------------------------------
       14930 |       0 | {TimeZone=UTC}

3. 用户级配置
alter role rolname set timezone='UTC';
或者
alter role all set timezone='UTC';

pipeline=# select * from pg_db_role_setting ;
 setdatabase | setrole |              setconfig               
-------------+---------+--------------------------------------
       14930 |       0 | {TimeZone=UTC}
           0 |       0 | {TimeZone=UTC}