mysql - StoredProcedure not workng correctly -

what doing here updating records when record_id=0 , activity_id=0 condition fails..but result getting is updating records regardless of condition where activity_id = activity_id (in update tms_activity line)

this procedure wrote in mysql

 create procedure `emptimesheet_savetasks`(in user_id int(11),     in date date,     in record_id int(11),     in task_id int(10),     in hours double,     in description longtext,     in updated_by_id int(11),     in project_id int(11),     in project_name varchar(50),     in task_name varchar(50),     in activity_id int(11),     in deleted_id varchar(100)     )     begin      if record_id = 0       insert ignore tms_timesheet(user_id, date, is_freezed)  values (user_id,date,0);      set @id = (select record_id tms_timesheet user_id= user_id  , date=date);      insert tms_activity (timesheet_id, task_id, hours, description, updated_on, updated_by_id,project_id,project_name,task_name )  values (@id ,task_id,hours ,description, current_timestamp( ) ,user_id,project_id,project_name ,task_name );       else if activity_id = 0      insert tms_activity ( timesheet_id, task_id, hours, description, updated_on, updated_by_id,project_id,project_name,task_name )  values (record_id ,task_id,hours ,description, current_timestamp( ) ,user_id, project_id ,project_name,task_name);      else           update tms_activity  set  task_id=task_id, hours=hours, description=description, updated_on=current_timestamp( ),    updated_by_id=user_id,project_id=project_id,task_name=task_name,project_name=project_name *****where activity_id = activity_id;*****      end if;       end if;      if deleted_id!=''       delete tms_activity activity_id in (deleted_id);      end if;      end 

i solved myself solution quiet weird me because when changed parameter name activity_id activityid,it worked..i dont know reason how happened , why..but solved error