fixed no data bug in filtering

csst_dag/dag/_base_dag.py

@@ -88,21 +88,14 @@ class BaseDAG:
             join_type="inner",
         )
         if len(filtered_data_basis) == 0:
-            print(">>> Input plan basis:")
-            plan_basis.pprint()
-            print(">>> Input data basis:")
-            data_basis.pprint()
-            raise ValueError("No data found for the given pattern.")
+            return plan_basis[:0], filtered_data_basis
         u_data_basis = table.unique(filtered_data_basis["dataset", "obs_id"])
-        if len(u_data_basis) == 0:
-            filtered_plan_basis = plan_basis[:0]
-        else:
-            filtered_plan_basis = table.join(
-                u_data_basis,
-                plan_basis,
-                keys=["dataset", "obs_id"],
-                join_type="inner",
-            )
+        filtered_plan_basis = table.join(
+            u_data_basis,
+            plan_basis,
+            keys=["dataset", "obs_id"],
+            join_type="inner",
+        )
         return filtered_plan_basis, filtered_data_basis
 
     def schedule(