如何在存储过程中创建mysql嵌套循环
我得到了要创建的异常。有人能帮我吗?如何以正确的方式在Mysql的存储过程中编写嵌套循环?我的错误是什么如何在存储过程中创建mysql嵌套循环,mysql,stored-procedures,Mysql,Stored Procedures,我得到了要创建的异常。有人能帮我吗?如何以正确的方式在Mysql的存储过程中编写嵌套循环?我的错误是什么 DELIMITER $$ `INVESTMENT_MATCH_POINT_CREATOR`(_percentage INT, _vat_tex INT) BEGIN DECLARE _user_id INT; DECLARE _package_id INT; DECLARE _left_investment INT; DECLARE _right_in
DELIMITER $$
`INVESTMENT_MATCH_POINT_CREATOR`(_percentage INT, _vat_tex INT)
BEGIN
DECLARE _user_id INT;
DECLARE _package_id INT;
DECLARE _left_investment INT;
DECLARE _right_investment INT;
DECLARE _left_point INT;
DECLARE _right_point INT;
DECLARE _left_carry_point INT;
DECLARE _right_carry_point INT;
DECLARE _get_point INT;
DECLARE done BOOLEAN DEFAULT FALSE;
DECLARE _user_investment_table CURSOR FOR SELECT user_id,package_id,left_invesetment,right_investment DATA FROM user_investment_match;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN _user_investment_table;
read_loop:LOOP
FETCH _user_investment_table INTO _user_id,_package_id,_left_investment,_right_investment;
IF done THEN
LEAVE read_loop;
END IF;
BEGIN
DECLARE _match_point INT;
DECLARE done2 BOOLEAN DEFAULT FALSE;
DECLARE _package_match_point_table CURSOR FOR SELECT match_point DATA FROM package_match_points WHERE package_id=_package_id ORDER BY match_point DESC;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done2 = TRUE;
OPEN _package_match_point_table;
read_loop2:LOOP
FETCH _package_match_point_table INTO _match_point;
IF done2 THEN
LEAVE read_loop2;
END IF;
/*if(_match_point=<_left_investment) and (_match_point=<_right_investment) then
set _left_point=abs(_left_investment-_match_point);
set _right_point=abs(_right_investment-_match_point);
set _get_point=((_match_point*_percentage)/100);
end if;*/
END LOOP;
CLOSE _package_match_point_table;
END$$
END LOOP;
CLOSE _user_investment_table;
END$$
DELIMITER ;
您应该只在过程的末尾使用指定的分隔符,但是在代码中,您是在内部块的末尾使用$$分隔符,换句话说,您正在使用$$分隔符,它在过程实际结束之前表示过程结束您应该只在过程结束时使用指定的分隔符,但是在代码中,您在内部块的结尾使用$$分隔符,换句话说,您正在使用$$分隔符,它在过程实际结束之前表示过程结束我敢打赌,99%的情况下,如果您嵌套了游标,那么您是做错了什么。你的示例代码太长了。我敢打赌,99%的情况下,如果你嵌套了游标,你就做错了。您的示例代码太长。