DELIMITER $$

CREATE
    /*[DEFINER = { user | CURRENT_USER }]*/
    PROCEDURE `member_score`(IN courseid INT)
    /*LANGUAGE SQL
    | [NOT] DETERMINISTIC
    | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }
    | SQL SECURITY { DEFINER | INVOKER }
    | COMMENT 'string'*/
    BEGIN
    
	CREATE TEMPORARY TABLE IF NOT EXISTS course_teachers (  
           id INT 
          
         );  
         TRUNCATE TABLE course_teachers; 
         
	 CREATE TEMPORARY TABLE IF NOT EXISTS mems (  
           id INT ,  
           user_id INT,  
           course_id INT,  
					 created_on DATETIME,
           course_group_id INT,
					 score FLOAT DEFAULT 0
         );  
         TRUNCATE TABLE mems; 

	 CREATE TEMPORARY TABLE IF NOT EXISTS mem_home (  
           id INT,  
           user_id INT,  
           course_id INT,  
					 created_on DATETIME,
           course_group_id INT,
					 home_id INT, 
					 score FLOAT DEFAULT 0
         );  
         TRUNCATE TABLE mem_home;  

   CREATE TEMPORARY TABLE IF NOT EXISTS t_scores (  
           
           home_id INT,  
           score FLOAT
         );  
         TRUNCATE TABLE t_scores; 

   CREATE TEMPORARY TABLE IF NOT EXISTS s_scores (  
           
           home_id INT,  
           score FLOAT
         );  
         TRUNCATE TABLE s_scores; 

 CREATE TEMPORARY TABLE IF NOT EXISTS scores (  
           
           user_id INT,  
           score FLOAT
         );  
         TRUNCATE TABLE scores; 
         
         INSERT INTO course_teachers (SELECT members.user_id FROM members WHERE members.user_id NOT IN (SELECT student_id FROM students_for_courses WHERE course_id = courseid));

				#查出所有的学生
	   
 INSERT INTO mems (id, user_id, course_id, created_on, course_group_id)  
						(SELECT members.id, members.user_id, members.course_id, members.created_on, members.course_group_id
							FROM members WHERE course_id = courseid AND members.user_id NOT IN (SELECT id FROM course_teachers));
       
				# 查出所有的学生列表及其作业
         INSERT INTO mem_home (id, user_id, course_id, created_on, course_group_id,home_id)  
						(SELECT members.id, members.user_id, members.course_id, members.created_on, members.course_group_id, homework_attaches.id
							FROM members, homework_attaches WHERE course_id = courseid 
						AND members.user_id = homework_attaches.user_id AND members.user_id NOT IN (SELECT id FROM course_teachers)
					 AND homework_attaches.bid_id IN (SELECT bid_id FROM homework_for_courses WHERE course_id = courseid ));
			
			INSERT INTO t_scores (home_id, score)	(SELECT rateable_id,AVG(seems_rateable_rates.stars) 
		FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id IN (SELECT mem_home.home_id FROM mem_home)
		AND rater_id  IN (SELECT id FROM course_teachers)
			 GROUP BY rateable_id);
			 
			INSERT INTO s_scores (home_id, score)	(SELECT rateable_id,AVG(seems_rateable_rates.stars) 
		FROM seems_rateable_rates WHERE rateable_type = 'HomeworkAttach' AND rateable_id IN (SELECT mem_home.home_id FROM mem_home)
			AND rater_id NOT IN (SELECT id FROM course_teachers)
			 GROUP BY rateable_id) ;  
	
		UPDATE mem_home, t_scores SET mem_home.score = t_scores.score WHERE mem_home.home_id = t_scores.home_id ;
		 
		UPDATE mem_home, s_scores SET mem_home.score = s_scores.score WHERE mem_home.home_id = s_scores.home_id AND mem_home.score = 0;
   
		INSERT INTO scores (user_id, score) (SELECT user_id, SUM(score) FROM mem_home GROUP BY user_id);
		UPDATE mems, scores SET mems.score = scores.score WHERE mems.user_id = scores.user_id;
	
		SELECT * FROM mems ORDER BY score DESC;
    END$$

DELIMITER ;