fix: raise error in sqllab when using reserved column name (#9859)

superset-frontend/spec/javascripts/sqllab/ExploreResultsButton_spec.jsx

@@ -101,6 +101,7 @@ describe('ExploreResultsButton', () => {
       '1',
       '123',
       'CASE WHEN 1=1 THEN 1 ELSE 0 END',
+      '__TIMESTAMP',
     ]);
 
     const msgWrapper = shallow(wrapper.instance().renderInvalidColumnMessage());

superset-frontend/spec/javascripts/sqllab/fixtures.js

@@ -315,6 +315,16 @@ export const queryWithBadColumns = {
         name: 'CASE WHEN 1=1 THEN 1 ELSE 0 END',
         type: 'STRING',
       },
+      {
+        is_date: true,
+        name: '_TIMESTAMP',
+        type: 'TIMESTAMP',
+      },
+      {
+        is_date: true,
+        name: '__TIMESTAMP',
+        type: 'TIMESTAMP',
+      },
     ],
   },
 };