Add DuckDB connector with execute_sql and search_objects support

dbhub.toml

@@ -0,0 +1,12 @@
+# dbhub.toml
+[[sources]]
+id = "postgres_logic"
+description = "Production PostgreSQL database"
+dsn = "postgresql://postgres:DigiBull@192.168.1.18:5432/logic_db_2?sslmode=disable"
+
+[[sources]]
+id = "duckdb_local"
+description = "Local DuckDB analytical database"
+# Use an absolute path or a path relative to where you run DBHub.
+# For an in-memory database, use: dsn = "duckdb://:memory:"
+dsn = "duckdb:///C:/SRIM-DB-SETUP/Databases/Bom_storage.duckdb"

package.json

@@ -45,6 +45,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
+    "@duckdb/node-api": "1.5.6-r.1",
     "@iarna/toml": "^2.2.5",
     "@modelcontextprotocol/node": "^2.0.0",
     "@modelcontextprotocol/server": "^2.0.0",

src/api/openapi.d.ts

@@ -64,7 +64,7 @@ export interface components {
              * @example postgres
              * @enum {string}
              */
-            type: "postgres" | "mysql" | "mariadb" | "sqlserver" | "sqlite" | "oracle";
+            type: "postgres" | "mysql" | "mariadb" | "sqlserver" | "sqlite" | "oracle" | "duckdb";
             /**
              * @description Database host (not present for SQLite)
              * @example localhost

src/api/openapi.yaml

@@ -102,7 +102,7 @@ components:
           example: Production read replica for analytics queries
         type:
           type: string
-          enum: [postgres, mysql, mariadb, sqlserver, sqlite, oracle]
+          enum: [postgres, mysql, mariadb, sqlserver, sqlite, oracle,duckdb]
           description: Database type
           example: postgres
         host: