Question

我已经花了2个多小时来尝试用Google搜索答案。

我对SQL和MySQL完全陌生，我尝试编写以下函数：

CREATE FUNCTION fp_spinofffactor (id char(8), startdate date)
RETURNS float
BEGIN
DECLARE spinoffFactor float;               (ERROR- EXPECTED A ";")
select spinoffFactor = ISNULL(EXP(SUM(LOG(spinoffFactor))),1)
from( 
select case when (prev_price- divs) <= 0 THEN 1 
else (prev_price- divs)/prev_price end as spinoffFactor
    from (select
    divs,
    fp_v2.fp_prevUnadjPrice(id, ex_date) as prev_price
from (
select sum(fbd.p_divs_pd) as divs,fbd.p_divs_exdate as ex_date
from fp_v2.fp_basic_dividends fbd
where fbd.fsym_id = id
and fbd.p_divs_s_pd=1
and fbd.p_divs_exdate > startdate
group by fbd.p_divs_exdate ) a ) b ) c; 
return spinofffactor;              ERROR (Return is not valid at this position)
END                                ERROR (END IS NOT VALID AT THIS position)

但是我遇到多个语法错误。我把错误写在了哪里。

我很难找到有关MySQL和工作台的语法规则的信息。

任何人都可以帮忙吗？

Answer 1

您需要在MySql工作台中提供定界符，以告诉您代码的开始和结束位置。假设您的语法正确，则可以编写如下内容。

DELIMITER $$
CREATE FUNCTION fp_spinofffactor (id char(8), startdate date)
RETURNS float
BEGIN
DECLARE spinoffFactor float;       
    select spinoffFactor = ISNULL(EXP(SUM(LOG(spinoffFactor))),1)
    from( 
    select case when (prev_price- divs) <= 0 THEN 1 
    else (prev_price- divs)/prev_price end as spinoffFactor
        from (select
        divs,
        fp_v2.fp_prevUnadjPrice(id, ex_date) as prev_price
    from (
    select sum(fbd.p_divs_pd) as divs,fbd.p_divs_exdate as ex_date
    from fp_v2.fp_basic_dividends fbd
    where fbd.fsym_id = id
    and fbd.p_divs_s_pd=1
    and fbd.p_divs_exdate > startdate
    group by fbd.p_divs_exdate ) a ) b ) c; 
return spinofffactor;              
END$$
DELIMITER ;

您还可以从MySQL命令提示符运行此命令，它应该可以工作。

创建函数时遇到语法错误

1 个答案: