Postgres数据库配置用户读写权限（read_write）和只读权限(read_only):

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Postgres数据库配置用户读写权限（read_write）和只读权限(read_only):

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（1）读写权限gdxx

CREATE ROLE gdxx WITH LOGIN PASSWORD 'Ka888888';
GRANT CONNECT ON DATABASE postgis_sample TO gdxx;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO gdxx;
GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public TO gdxx;
GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA public TO gdxx;
ALTER DEFAULT PRIVILEGES FOR USER gdxx GRANT ALL PRIVILEGES ON TABLES TO gdx;
ALTER DEFAULT PRIVILEGES FOR USER gdxx GRANT ALL PRIVILEGES ON SEQUENCES TO gdxx;
ALTER DEFAULT PRIVILEGES FOR USER gdxx GRANT ALL PRIVILEGES ON FUNCTIONS TO gdxx;

在上述命令中，readwrite_user （gdxx）是你要创建的读写账号的用户名，password (Ka888888)是账号的密码，db1 (postgis_sample)是目标数据库的名称。请确保将 password 替换为实际的密码，并根据你的实际情况更改数据库名称

完成上述步骤后，读写账号 readwrite_user 将具有对 postgis_sample数据库的读写权限，并可以执行查询、插入、更新和删除操作。

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（2）只读权限read_only_user

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CREATE ROLE read_only_gdx WITH LOGIN PASSWORD 'Ka888888';
GRANT CONNECT ON DATABASE postgis_anhui TO read_only_gdx;
GRANT USAGE ON SCHEMA public TO read_only_gdx;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO read_only_gdx;