寫一個儲存過程，結果老報錯，提示說是死迴圈錯誤，

call core_getparentjob(10,1,@a)    Error Code: 1456.

Recursive limit 0 (as set by the max_sp_recursion_depth variable) was exceeded for routine core_getparentjob

怎麼檢查也不知道哪裡出了問題。

不過執行這條語句，SET @@SESSION.max_sp_recursion_depth=25; 設定迴圈深度，至少不報錯。

儲存過程

DELIMITER $$

CREATE DEFINER=`root`@`localhost` PROCEDURE `core_getparentjob`(in jobId int, in xtype int, out tempJobId int)
BEGIN
    DECLARE parentJobId int;
    DECLARE tt int;
    DECLARE tc int;
    set parentJobId = 0;
    -- Get the parent job id
    select parentId into parentJobId from core_job ta where ta.ID_ = jobId;
    -- Get the manager
    if xtype = 1 then
        set tc = 0;
        select count(*) into tc from core_job ta where ta.ID_ = parentJobId and ta.isManager = 1;
        
        if tc = 0 and parentJobId > 0 then
             call core_getparentjob(parentJobId,1, tt);
             set parentJobId = tt;
        end if;
        
    end if;
    set tempJobId = parentJobId;
    select parentJobId;
END
 

MySQL官方文件指出 函式無法用遞迴呼叫

儲存過程可以用遞迴呼叫。但是，預設情況下，是禁用的。

還有其他一些引數需要調整。