我不明白为什么我在下面的 sp 代码上出现语法错误。谁能帮我解决这个问题?
SQL 错误 (1064):
您的 SQL 语法有错误;检查与您的 MySQL 服务器版本相对应的手册,以在第 8 行的“DECLARE CUR1 CURSOR FOR SELECT pc.prospectus_courses_id FROM prereq_cou”附近使用正确的语法
DELIMITER $$
DROP PROCEDURE IF EXISTS get_prereqs3$$
CREATE PROCEDURE get_prereqs3(IN prosp_courses_id SMALLINT(5))
BEGIN
DECLARE done int DEFAULT FALSE;
DECLARE required SMALLINT(5) default 0;
DECLARE to_search SMALLINT(5) default 0;
DROP TABLE IF EXISTS tmp_list;
CREATE TABLE tmp_list(courses_id SMALLINT(5), courses_id_req SMALLINT(5)) ENGINE = MEMORY;
DECLARE CUR1 CURSOR FOR SELECT pc.prospectus_courses_id
FROM prereq_courses pc
JOIN prerequisites pr on (pr.id = pc.prerequisites_id)
JOIN prospectus_courses ps on (ps.id = pr.prospectus_courses_id)
WHERE ps.id = to_search
MAIN_LOOP: LOOP
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN cur1;
FETCH cur1 INTO required;
IF done THEN
CLOSE cur1;
LEAVE main_loop;
ELSE
insert into tmp_list values (to_search, required);
set to_search = required;
iterate main_loop;
END IF;
END LOOP;
select c.course_code
from tmp_list t
join prospectus_courses pc on pc.id = t.courses_id_req
join courses c on c.id = pc.courses_id ;
drop table tmp_list;
END$$
DELIMITER ;