- Postgresql Mcp Ddz
Postgresql Mcp Ddz
PostgreSQL MCP Server
一个基于模型上下文协议(MCP)的 PostgreSQL 数据库操作服务器,让 AI 助手能够通过标准化接口与 PostgreSQL 数据库交互。
Content
PostgreSQL MCP Server
一个基于模型上下文协议(MCP)的 PostgreSQL 数据库操作服务器,让 AI 助手能够通过标准化接口与 PostgreSQL 数据库交互。
功能特性
- 查询执行:执行带参数化的 SELECT 查询
- 数据修改:执行 INSERT、UPDATE、DELETE 操作
- 结构查询:列出数据库表、查看表结构
- 性能分析:使用 EXPLAIN 分析查询性能
- 连接管理:支持环境变量自动连接,安全可靠
安装
npm install postgresql-mcp-ddz
或直接使用 npx:
npx postgresql-mcp-ddz
配置
方式一:环境变量自动连接(推荐)
在 MCP 客户端配置中添加环境变量,服务器启动时会自动连接数据库:
{
"mcpServers": {
"postgresql-mcp-ddz": {
"command": "npx",
"args": ["postgresql-mcp-ddz"],
"env": {
"POSTGRES_HOST": "127.0.0.1",
"POSTGRES_PORT": "5432",
"POSTGRES_USER": "postgres",
"POSTGRES_PASSWORD": "your_password",
"POSTGRES_DB": "your_database"
}
}
}
}
支持的环境变量:
| 变量名 | 说明 | 必填 |
|---|---|---|
POSTGRES_HOST | 数据库主机地址 | 是 |
POSTGRES_PORT | 数据库端口(默认 5432) | 否 |
POSTGRES_USER | 数据库用户名 | 是 |
POSTGRES_PASSWORD | 数据库密码 | 是 |
POSTGRES_DB | 数据库名称 | 是 |
方式二:手动连接
不在配置中添加环境变量时,需要通过 connect_db 工具手动连接:
{
"mcpServers": {
"postgresql": {
"command": "npx",
"args": ["postgresql-mcp-ddz"]
}
}
}
可用工具
connect_db
连接到 PostgreSQL 数据库(环境变量配置后可省略此步骤)。
参数:
host(字符串,必填):数据库主机地址port(数字,可选):数据库端口,默认 5432user(字符串,必填):数据库用户名password(字符串,必填):数据库密码database(字符串,必填):数据库名称
示例:
{
"host": "localhost",
"port": 5432,
"user": "postgres",
"password": "password",
"database": "mydb"
}
query
执行 SELECT 查询并返回结果。
参数:
sql(字符串,必填):SQL SELECT 查询语句params(数组,可选):查询参数
示例:
{
"sql": "SELECT * FROM users WHERE age > $1",
"params": [18]
}
execute
执行 INSERT、UPDATE 或 DELETE 查询。
参数:
sql(字符串,必填):SQL 语句params(数组,可选):查询参数
示例:
{
"sql": "INSERT INTO users (name, email) VALUES ($1, $2)",
"params": ["张三", "zhangsan@example.com"]
}
list_tables
列出当前数据库中的所有表。
describe_table
获取指定表的结构信息,包括列、主键和外键。
参数:
table(字符串,必填):表名
示例:
{
"table": "users"
}
explain
使用 EXPLAIN 分析 SQL 查询性能。
参数:
sql(字符串,必填):要分析的 SQL 查询
示例:
{
"sql": "SELECT * FROM users WHERE email = 'test@example.com'"
}
show_statement
执行 SHOW 语句。
参数:
sql(字符串,必填):SHOW SQL 语句
示例:
{
"sql": "SHOW ALL"
}
安全说明
query工具仅允许 SELECT、SHOW、EXPLAIN 和 WITH 查- 数据修改操作请使用
execute工具 - 所有查询支持参数化输入,防止 SQL 注入
- 数据库凭据仅在运行时传递,不会被持久化存储
Server Config
{
"mcpServers": {
"postgresql-mcp-ddz": {
"command": "npx",
"args": [
"postgresql-mcp-ddz"
],
"env": {
"POSTGRES_HOST": "127.0.0.1",
"POSTGRES_PORT": "5432",
"POSTGRES_USER": "postgres",
"POSTGRES_PASSWORD": "your_password",
"POSTGRES_DB": "your_database"
}
}
}
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