新建角色python：可以登陆，继承权限
CREATE role python WITH LOGIN ENCRYPTED PASSWORD '111111';
新建模式temp,给python用户存放临时表
CREATE SCHEMA temp;
grant all on schema temp to python;
grant create on schema temp to python;
grant usage on schema temp to python;
将gpadmin创建的表，授权给python
grant select on glfmwdkz to python;
python用户登陆后使用表(public模式下只读，temp可以读写):
create table temp.g1(like glfmwdkz);
insert into temp.g1 select * from glfmwdkz;