Add icon in datasource table page to show the default datasource

Signed-off-by: Yuanqi(Ella) Zhu <zhyuanqi@amazon.com>

CHANGELOG.md

@@ -60,6 +60,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Multiple Datasource] Add default functionality for customer to choose default datasource ([#6058](https://github.com/opensearch-project/OpenSearch-Dashboards/issues/6058))
 - [Multiple Datasource] Add import support for Vega when specifying a datasource ([#6123](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6123))
 - [Workspace] Validate if workspace exists when setup inside a workspace ([#6154](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6154))
+- [Multiple Datasource] Add icon in datasource table page to show the default datasource ([#6231](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6231))
+
 
 ### 🐛 Bug Fixes
 

src/plugins/data_source_management/public/components/data_source_table/data_source_table.tsx

@@ -4,6 +4,7 @@
  */
 
 import {
+  EuiBadge,
   EuiButton,
   EuiButtonEmpty,
   EuiConfirmModal,
@@ -50,6 +51,7 @@ export const DataSourceTable = ({ history }: RouteComponentProps) => {
     setBreadcrumbs,
     savedObjects,
     notifications: { toasts },
+    uiSettings,
   } = useOpenSearchDashboards<DataSourceManagementContext>().services;
 
   /* Component state variables */
@@ -75,6 +77,8 @@ export const DataSourceTable = ({ history }: RouteComponentProps) => {
     fetchDataSources();
   });
 
+  const defaultDataSourceID = uiSettings.get('defaultDataSource', null);
+
   const fetchDataSources = () => {
     setIsLoading(true);
     getDataSources(savedObjects.client)
@@ -147,6 +151,11 @@ export const DataSourceTable = ({ history }: RouteComponentProps) => {
           <EuiButtonEmpty size="xs" {...reactRouterNavigate(history, `${index.id}`)}>
             {name}
           </EuiButtonEmpty>
+          {index.id === defaultDataSourceID ? (
+            <EuiBadge iconType="starFilled" iconSide="left">
+              Default
+            </EuiBadge>
+          ) : null}
         </>
       ),
       dataType: 'string' as const,