alter user test set default_transaction_read_only=on; grant all on database crm_db to test; grant select on all tables in schema public to test;     // 起作用的是这句 要进入crm_db 操作,在那个db环境执行就授哪个db的权 删除前撤销 revoke all on database crm_prod_myl from test; revoke select on all tables in schema public from test;