diff --git a/public/app/plugins/datasource/mssql/datasource.ts b/public/app/plugins/datasource/mssql/datasource.ts
index be16c126c02..59f5bfde496 100644
--- a/public/app/plugins/datasource/mssql/datasource.ts
+++ b/public/app/plugins/datasource/mssql/datasource.ts
@@ -72,6 +72,9 @@ export class MssqlDatasource extends SqlDatasource {
   }
 
   getDB(): DB {
+    if (this.db !== undefined) {
+      return this.db;
+    }
     return {
       init: () => Promise.resolve(true),
       datasets: () => this.fetchDatasets(),