SQL Server MCP Service

import { CallToolResult } from '@modelcontextprotocol/sdk/types.js' import type { DatabaseConnection } from '../database' export async function getTableSchema( db: DatabaseConnection, tableName: string, schemaName: string = 'dbo' ): Promise<CallToolResult> { try { const pool = db.getPool() const query = ` SELECT c.COLUMN_NAME, c.DATA_TYPE, c.IS_NULLABLE, c.COLUMN_DEFAULT, c.CHARACTER_MAXIMUM_LENGTH, c.NUMERIC_PRECISION, c.NUMERIC_SCALE, CASE WHEN pk.COLUMN_NAME IS NOT NULL THEN 'YES' ELSE 'NO' END AS IS_PRIMARY_KEY FROM INFORMATION_SCHEMA.COLUMNS c LEFT JOIN ( SELECT ku.TABLE_NAME, ku.COLUMN_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE ku ON tc.CONSTRAINT_NAME = ku.CONSTRAINT_NAME WHERE tc.CONSTRAINT_TYPE = 'PRIMARY KEY' ) pk ON c.TABLE_NAME = pk.TABLE_NAME AND c.COLUMN_NAME = pk.COLUMN_NAME WHERE c.TABLE_NAME = @tableName AND c.TABLE_SCHEMA = @schemaName ORDER BY c.ORDINAL_POSITION ` const request = pool.request() request.input('tableName', tableName) request.input('schemaName', schemaName) const result = await request.query(query) return { content: [ { type: 'text', text: JSON.stringify( { table: `${schemaName}.${tableName}`, columns: result.recordset, }, null, 2 ), }, ], } } catch (error) { return { content: [ { type: 'text', text: `Erro: ${error instanceof Error ? error.message : 'Erro desconhecido'}`, }, ], isError: true, } } }