Procedure

Question

I am working on a intranet Project where I have a Procedure which gives the leave count of employee on a date.I want to add a field Employee_id in that Procedure which exist in two tables in Employee_mst and Leave_app_mst .
I want that if a person login by hsi/her employee_id than it will gave the leave record of that person how can i add the Employee_Id Field.the Procedure code is given Below.
ALTER PROCEDURE [dbo].[proc_getCalenderValue]     
@Val varchar(20),     
@Comp_id varchar(20)
  
AS     
BEGIN     
 select @Val date, isnull(sum(isnull(leave,0)),0) count from     
 (     
  select      
  case      
  when      
   convert(datetime ,@Val,103)     
  between     
   convert(datetime ,from_date,103)       
   and      
   convert(datetime ,to_date,103)      
  then 1     
  else     
  0 end leave     
  from Leave_App_Mst     
  where close_date is not null and Leave_Status = 'GRANT'     
  --AND Comp_Id = @Comp_id   
--  and datepart(month,from_date) = datepart(month,convert(datetime ,@Val,103))     
--  and datepart(year,from_date) = datepart(year,convert(datetime ,@Val,103))     
--  and datepart(month,to_date) = datepart(month,convert(datetime ,@Val,103))     
--  and datepart(year,to_date) = datepart(year,convert(datetime ,@Val,103))     
     
 ) x     
      
 /*select events,holiday_date,'1' is_holiday from holiday_details     
 where holiday_id in      
 (     
 select  holiday_id from holiday_mst     
 where holiday_year = datepart(year,convert(datetime ,@Val,103))      
 and Comp_id = @Comp_id     
 )     
 and holiday_date = convert(datetime ,@Val,103);    */ 
  
select events,holiday_date,'1' is_holiday from holiday_details a,holiday_mst b 
where a.holiday_id = b.holiday_id and   
holiday_date = convert(datetime ,@Val,103) and Comp_id = @Comp_id
      
END;