存储过程中动态执行SQL并获取返回结果

Posted 2020-08-09

很久没有写存储过程了，因为存储过程违背OOP精神，话说带了参数的存储过程，如果业务需求改变，改存储过程还真的挺麻烦的。所以现在比较倾向于负责的业务逻辑在业务层去处理，业务层专门做业务层的事情。

 

通过一层巧妙地包装，动态执行SQL语句就解决了

ALTER procedure [dbo].[PROC_NextSteps]
(
@Count int,
@IDS NVARCHAR(500),
@Rules NVARCHAR(MAX),
@IDSOut NVARCHAR(500) OUT
)
as
BEGIN
set @Rules=UPPER(@Rules);
set @IDSOut=‘‘
declare @index int
set @index=1;

WHILE(@index<=@Count)
BEGIN
DECLARE @SplitRule NVARCHAR(MAX),@Value int
select @SplitRule=dbo.F_SplitOfIndex(@Rules,‘|‘,@index)

if(CHARINDEX(‘SELECT‘,@SplitRule)=1)
begin
declare @sql nvarchar(1000)
select @sql=N‘select @Value=(‘[email protected]+‘)‘
 exec sp_executesql  @sql, N‘@Value int out‘,@Value out
end
ELSE IF(CHARINDEX(‘PROC_‘,@SplitRule)=1)
BEGIN
exec @Value =  @SplitRule
END
ELSE
BEGIN
set  @Value =  @SplitRule
END
if(@Value>=1)
begin
select @[email protected]+dbo.F_SplitOfIndex(@IDS,‘|‘,@index)+‘|‘
end
set @[email protected]+1
end
if(@IDSOut<>‘‘)
begin
set @IDSOut=LEFT(@IDSOut,LEN(@IDSOut)-1)
end

END

declare @res nvarchar(1000)
EXEC [dbo].[proc_nextsteps] 3,‘id1|id2|id3‘,‘SELECT COUNT(1) FROM dbo.A_CDKey|PROC_B|0‘,@res OUT
print @res