Fix dialect gone.

src/model/nodeUtil.ts

@@ -1,6 +1,7 @@
 import { Node } from "./interface/node";
 import { ConnectionManager } from "../service/connectionManager";
 import { SqlDialect } from "@/service/dialect/sqlDialect";
+import { ServiceManager } from "@/service/serviceManager";
 
 export abstract class NodeUtil {
     public static of(node: any): Node {
@@ -11,7 +12,7 @@ export abstract class NodeUtil {
             node.__proto__ = Node.prototype
         }
         if (node.dialect && !(node.dialect instanceof SqlDialect)) {
-            node.dialect.__proto__ = SqlDialect.prototype
+            node.dialect=ServiceManager.getDialect(node.dbType)
         }
         return node;
     }