DECLARE
    val_slime_ship      decimal(8,2); 
	val_tank_acum      	decimal(8,2);
BEGIN
   -----------
   SELECT 
    avg(NULLIF("F_ConvertedValue", '')::decimal(8,2))
    INTO val_slime_ship
    FROM 
         "SC_Tag"."T_TagData"
         where "F_TagName_ID" = 49 and "F_Date" > now() - interval '2 minutes'
    	 group by "F_Date"
     	 order by "F_Date" desc limit 1;

   SELECT 
    avg(NULLIF("F_ConvertedValue", '')::decimal(8,2))
    INTO val_tank_acum
    FROM 
         "SC_Tag"."T_TagData"
         where "F_TagName_ID" = 28 and "F_Date" > now() - interval '2 minutes'
    	 group by "F_Date"
     	 order by "F_Date" desc limit 1;
          	
   -- IF ((val_slime_ship + val_tank_acum) != 0 ) 
   -- THEN
    ---------
                                      return ( val_slime_ship);
   -----------
EXCEPTION
          WHEN others THEN
            RAISE NOTICE 'SQLSTATE: %', SQLSTATE;
            RAISE;
END;

DECLARE
    val_slime_ship      text; 
    val_tank_acum       DECIMAL (8,2);
BEGIN
   -----------
 
                                      RETURN ( 3424 );
 
   -----------
EXCEPTION
          WHEN others THEN
            RAISE NOTICE 'SQLSTATE: %', SQLSTATE;
            RAISE;
END;