vault backup: 2026-11-07 16:33:44

1 使用/数据库/OpenGauss/基本操作.md

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+操作用户
+```
+su - openGauss
+```
+
+
+登录
+```
+gsql -d postgres -p 15000
+```
+
+
+
+- 用户和数据库状态一键查询脚本
+```
+SELECT 
+    u.usename as "用户名",
+    d.datname as "数据库名",
+    CASE WHEN d.datdba = u.usesysid THEN '所有者' ELSE '使用者' END as "关系类型",
+    CASE WHEN u.usesysid = (SELECT datdba FROM pg_database WHERE datname = d.datname) 
+         THEN '是' ELSE '否' END as "是否为所有者",
+    has_database_privilege(u.usename, d.datname, 'CONNECT') as "连接权限",
+    has_database_privilege(u.usename, d.datname, 'CREATE') as "创建表权限"
+FROM pg_user u
+CROSS JOIN pg_database d
+WHERE d.datname NOT LIKE 'template%'
+ORDER BY u.usename, d.datname;
+```
+
+
+查看当前用户权限
+```
+SELECT 
+    rolname,
+    rolcreatedb,
+    rolsuper 
+FROM pg_roles 
+WHERE rolname = current_user;
+```
+
+- 创建用户
+```
+CREATE USER future WITH PASSWORD 'FutureV587?'
+  SYSADMIN    -- 授予系统管理员权限
+  CREATEDB    -- 授予创建数据库的权限
+  CONNECTION LIMIT 100; -- 限制最大连接数为100
+```
+
+
+
+
+  
+- 创建数据库
+```
+CREATE DATABASE futrue
+  WITH 
+  OWNER = future    -- 指定所有者为 omm
+  ENCODING = 'UTF8'  -- 设置编码
+  LC_COLLATE = 'en_US.UTF-8' -- 排序规则
+  LC_CTYPE = 'en_US.UTF-8'   -- 字符分类
+  CONNECTION LIMIT = -1;     -- 连接数限制（-1表示无限制）
+```
+
+
+退出
+```
+\q
+```