使用场景

一个计算价格的函数，多个存储过程调用，因业务需求经常要新增参数，避免修改函数时程序执行存储过程报错，将多个参数拼接为一个字符串传递

   -- 调用函数CalcuPrice(UnitPrice,CONCAT('MFQZC=',MFQZC,'&ItemNum=',ItemNum,'&AssmCode=',AssmCode))-- 定义函数function [CalcuPrice](@UnitPrice decimal(38, 3),		-- 单价@ARGS varchar(900))returns decimal(38, 3)as begin/*****************************************	解析参数列****************************************/-- 1、定义接受参数列表的变量declare @MFQZC varchar(100),@ItemNum varchar(100)/*物料编码*/,@AssmCode varchar(100)/*加工件编码*/declare @Str0 varchar(100),@Str1 varchar(100),@Str2 varchar(100)-- 2、循环读取键值对declare S_subject CURSOR FAST_FORWARD FORselect data from dbo.SplitStr(@ARGS,'&');open S_subject;fetch next from S_subject into @Str0;while @@FETCH_STATUS=0beginset @Str1= (select data from (select ROW_NUMBER() over (ORDER BY (select 1)) RowNum,data from dbo.SplitStr(@Str0, '=')) a where RowNum=1)set @Str2= (select data from (select ROW_NUMBER() over (ORDER BY (select 1)) RowNum,data from dbo.SplitStr(@Str0, '=')) a where RowNum=2)if(@Str1='MFQZC')beginset @MFQZC=@Str2endelse if(@Str1='ItemNum')beginset @ItemNum=@Str2endelse if(@Str1='AssmCode')beginset @AssmCode=@Str2endfetch next from S_subject into @Str0;endclose S_subject;deallocate S_subject;end;-- 接下来就可以用从字符串中解析出来的参数进行后续逻辑处理