Dameng DM8 MCP Server

Dameng DM8 MCP Server

达梦数据库 DM8 的 MCP 服务器,为 AI 助手提供只读 SQL 查询、表结构自动发现和样本数据查看功能。

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MCP Server for Dameng DM8

达梦数据库 DM8 的 MCP (Model Context Protocol) 服务器实现,为 AI 助手提供数据库查询和结构发现能力。

功能特性

类型 名称 功能
Tool dm_query 执行只读 SQL 查询(支持行数限制)
Tool dm_list_tables 列出所有表(支持包含视图)
Tool dm_describe_table 查看表完整结构(列/主键/索引/外键)
Tool dm_sample_data 查看表前 N 行数据样本
Resource schema://tables 自动发现所有表和视图
Resource table://{name} 自动发现单个表结构

配置

.mcp.json 文件

在项目根目录创建 .mcp.json 文件:

{
	"mcpServers":{
		"dameng":{
			"command":"npx",
			"args":[
				"-y",
				"mcp-server-dm8"
			],
			"env":{
				"DM_HOST":"192.168.1.19",
				"DM_PORT":"5237",
				"DM_USER":"DATA_SMP_USER",
				"DM_PASSWORD":"your_password",
				"DM_SCHEMA":"DATA_SMP_USER"
			}
		}
	}
}

环境变量

变量 说明 默认值 必填
DM_HOST 达梦数据库地址 localhost 否
DM_PORT 达梦数据库端口 5237 否
DM_USER 数据库用户名 SYSDBA 否
DM_PASSWORD 数据库密码 - 是
DM_SCHEMA 数据库模式 DM_USER 否

工具说明

dm_query

执行只读 SQL 查询。

参数:

  • sql - SQL 语句(仅支持 SELECT/SHOW/DESC/DESCRIBE/EXPLAIN/WITH)
  • max_rows - 最大返回行数(默认 1000,超出自动截断)

返回: rowCount、totalRowCount、isTruncated、fields、rows

dm_list_tables

列出所有表。

参数:

  • include_views - 是否包含视图(默认 false)

返回: totalCount、tables [{name, type, comments}]

dm_describe_table

查看表完整结构。

参数: table_name - 表名(字母/数字/下划线/横线)

返回: tableName、tableComments、columns、primaryKeys、indexes、foreignKeys

dm_sample_data

查看表数据样本。

参数:

  • table_name - 表名
  • limit - 行数(1-1000,默认 10)

返回: tableName、rowCount、fields、rows

Resource(自动发现)

AI 可以自动读取以下资源,无需显式调用工具:

  • schema://tables — 获取所有表和视图的完整列表
  • table://表名 — 获取单个表的完整结构(含外键关系)

安全特性

  • SQL 注入防护 - 表名正则验证 + 危险关键字拦截
  • 只读限制 - 仅允许 SELECT/SHOW/DESC/EXPLAIN/WITH
  • 多语句防护 - 禁止包含分号(;)
  • 行数限制 - dm_query 和 dm_sample_data 最大 1000 行
  • 密码校验 - 启动时强制检查 DM_PASSWORD
  • 连接池管理 - 自动释放连接

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