java - 将SQL语句转换为mySQL存储过程

Question

我有一段 SQL 可以计算出高尔夫球手在排行榜上的排名。我是 Spring 的新手，我认为我无法使用 Spring JDBC 执行此操作，因此我认为我需要将其转换为 mySQL 存储过程。

谁能给我一些关于我需要转换什么的指示？简单地放置 CREATE PROCEDURE 和围绕它的参数列表是行不通的。

SET @rank = 1, @prev_val = NULL, @prev_rank = NULL;
SELECT rank FROM
(
 SELECT @rank := IF(@prev_val!=winnings,@prev_rank+1,@rank) AS rank
     , @prev_val := winnings AS winnings
     , @prev_rank := @rank AS prevRank
     , t.golferID
  FROM 
     (
        select g.golferID, sum(winnings) as winnings 
        from results r
        join resultDetails rd on r.resultID = rd.resultID
        join golfers g on rd.golferID = g.golferID
        where r.status = 'C' and r.compID = 1 
        group by golferID order by winnings desc
     ) AS t
) AS showRank WHERE golferID = 16

Answer 1

这会让你开始:

drop procedure if exists get_golfer_rank;

delimiter #

create procedure get_golfer_rank
(
p_golferID int unsigned
)
proc_main:begin

set @rank = 0;

select 
...
where golferID = p_golferID;

end proc_main #

delimiter ;


call get_golfer_rank(18);