fix unit test

Author: Jiayu Liu

datafusion/tests/sql.rs

@@ -804,8 +804,8 @@ async fn csv_query_window_with_empty_over() -> Result<()> {
     let sql = "SELECT count(c12) over () FROM aggregate_test_100";
     // FIXME: so far the WindowAggExec is not implemented
     // and the current behavior is to throw not implemented exception
-    let plan = ctx.create_logical_plan(&sql);
-    assert!(plan.is_err());
+    let result = execute(&mut ctx, sql);
+    assert!(result.is_err());
     Ok(())
 }