insert exec 不能嵌套,该怎么解决

insert exec 不能嵌套
前些天在论坛上看到过一个帖子，
好像完美兄说用下面的方法能巧妙解决insert exec 不能嵌套的问题。
http://topic.csdn.net/u/20091112/20/74132CBF-1570-4673-B12C-2443EA196B06.html


但是我照着做似乎还是不行，再请教一下大家。

SQL code

if object_id('p1','p') is not nulldrop proc p1gocreate proc p1 ascreate table #t(id int)insert #t select 100select * from #tgoif object_id('p2','p') is not nulldrop proc p2gocreate proc p2 asif object_id('tempdb..#t') is not null    insert #t exec p1elsebegin    create table #t(id int)    insert #t exec p1endselect * from #tgoif object_id('p3','p') is not nulldrop proc p3gocreate proc p3 ascreate table #t(id int)insert #t exec p2select * from #tgoexec p1exec p2exec p3 --INSERT EXEC 语句不能嵌套。

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AD
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探讨

很急，大家帮忙看看

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试了下
消息 8164，级别 16，状态 1，过程 p2，第 3 行
An INSERT EXEC statement cannot be nested.
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学习
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SQL code

用临时表的方法，        IF object_id('[tempdb].[dbo].#tmp') IS NOT NULL --判断临时表#tmp是否存在,存在则删除            drop table #tmp        select * into #tmp from tablename where 1=2 --创建临时表#tmp,其结构与tablename相同        declare @QueryString nvarchar(1000) --动态查询语名变量(注：必须为ntext或nchar哐nvarchar类型，不能是varchar类型)        set @QueryString='select * from tablename '        insert into #tmp(field1,field2,...) exec(@querystirng)
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学习。
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探讨

试了下
消息 8164，级别 16，状态 1，过程 p2，第 3 行
An INSERT EXEC statement cannot be nested.

[解决办法]
能不能把PRO2改成表函数
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SQL code
那只能用存储过程调用存储过程了参考一下吧  临时表没办法嵌套 考虑用output来做第一种方法: 使用output参数USE AdventureWorks;GOIF OBJECT_ID ( 'Production.usp_GetList', 'P' ) IS NOT NULL     DROP PROCEDURE Production.usp_GetList;GOCREATE PROCEDURE Production.usp_GetList @product varchar(40)     , @maxprice money     , @compareprice money OUTPUT    , @listprice money OUTAS    SELECT p.name AS Product, p.ListPrice AS 'List Price'    FROM Production.Product p    JOIN Production.ProductSubcategory s       ON p.ProductSubcategoryID = s.ProductSubcategoryID    WHERE s.name LIKE @product AND p.ListPrice < @maxprice;-- Populate the output variable @listprice.SET @listprice = (SELECT MAX(p.ListPrice)        FROM Production.Product p        JOIN  Production.ProductSubcategory s           ON p.ProductSubcategoryID = s.ProductSubcategoryID        WHERE s.name LIKE @product AND p.ListPrice < @maxprice);-- Populate the output variable @compareprice.SET @compareprice = @maxprice;GO另一个存储过程调用的时候:Create Proc TestasDECLARE @compareprice money, @cost money EXECUTE Production.usp_GetList '%Bikes%', 700,     @compareprice OUT,     @cost OUTPUTIF @cost <= @compareprice BEGIN    PRINT 'These products can be purchased for less than     $'+RTRIM(CAST(@compareprice AS varchar(20)))+'.'ENDELSE    PRINT 'The prices for all products in this category exceed     $'+ RTRIM(CAST(@compareprice AS varchar(20)))+'.'第二种方法:创建一个临时表create proc GetUserNameasbegin    select 'UserName'endCreate table #tempTable (userName nvarchar(50))insert into #tempTable(userName)exec GetUserNameselect #tempTable--用完之后要把临时表清空drop table #tempTable--需要注意的是，这种方法不能嵌套。例如：  procedure   a     begin         ...         insert   #table   exec   b     end         procedure   b     begin         ...         insert   #table    exec   c         select   *   from   #table       end         procedure   c     begin         ...         select   *   from   sometable     end  --这里ａ调ｂ的结果集，而ｂ中也有这样的应用ｂ调了ｃ的结果集，这是不允许的，--会报“INSERT EXEC 语句不能嵌套”错误。在实际应用中要避免这类应用的发生。第三种方法:声明一个变量,用exec(@sql)执行:1);EXEC 执行SQL语句declare @rsql varchar(250)        declare @csql varchar(300)        declare @rc nvarchar(500)        declare @cstucount int        declare @ccount int        set @rsql='(select Classroom_id from EA_RoomTime where zc='+@zc+' and xq='+@xq+' and T'+@time+'=''否'') and ClassroomType=''1'''        --exec(@rsql)        set @csql='select @a=sum(teststucount),@b=sum(classcount) from EA_ClassRoom where classroom_id in '        set @rc=@csql+@rsql        exec sp_executesql @rc,N'@a int output,@b int output',@cstucount output,@ccount output--将exec的结果放入变量中的做法        --select @csql+@rsql        --select @cstucount本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/fredrickhu/archive/2009/09/23/4584118.aspx 
 
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怎么不在p2里让结果暂存？ 比如用 全域临时表？
SQL code
if object_id('p1','p') is not nulldrop proc p1gocreate proc p1 ascreate table #t(id int)insert #t select 100select * from #tgoif object_id('p2','p') is not nulldrop proc p2gocreate proc p2 asif object_id('tempdb..#t') is not null    insert #t exec p1elsebegin    create table #t(id int)    insert #t exec p1endif object_id('tempdb..##t') is not null   drop table ##tcreate table ##t (id int)insert into ##t select id from #tgoif object_id('p3','p') is not nulldrop proc p3gocreate proc p3 ascreate table #t(id int)insert #t select * from ##tselect * from #tgoexec p1exec p2exec p3 --INSERT EXEC 语句不能嵌套。
[解决办法]
探讨

引用:
SQL codeifobject_id('p3','p')isnotnulldropproc p3gocreateproc p3asselect*into #tmpfrom #twhere1=2declare@QueryStringnvarchar(1000)set@QueryString='select * from #t'insert #tmpexec (@querystirng)select?-

哪里引用了p2？

实际上我的p2非常复杂，p3必须要引用p2.

[解决办法]
学习
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learning
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帮顶
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学习
[解决办法]
if object_id('p1','p') is not null
drop proc p1
go
create proc p1 as
create table #t(id int)
insert #t select 100
select * from #t
go

if object_id('p2','p') is not null
drop proc p2
go
create proc p2 as
if object_id('tempdb..#t') is not null
   insert #t exec p1
else
begin
   create table #t(id int)
   insert #t exec p1
end
select * from #t
go

if object_id('p3','p') is not null
drop proc p3
go
create proc p3 as
create table #t(id int)
/*insert #t */exec p2
--select * from #t
go


exec p1
exec p2
exec p3 --INSERT EXEC 语句不能嵌套。


(1 行受影响)
id
-----------
100

(1 行受影响)


(1 行受影响)
id
-----------
100

(1 行受影响)


(1 行受影响)
id
-----------
100

(1 行受影响)


不能嵌套, 不支持 exec..(exec...)
[解决办法]
大概看出了两点:
1.存储过程内insert #t exec 嵌套不能超过两层，超过了就报那个错
2.要分清每个#t不是指的同一个对象，其中有的是直接插入p3中的#t，有的是通过p2,p1中的#t select后插入到p3中的#t
[解决办法]
1.存储过程内insert #t exec 嵌套不能超过两层，超过了就报那个错  

是有这个限制的
[解决办法]
所以按30楼的执行应该可以：看看下面的示例应该更清楚
SQL code
if object_id('p111','p') is not nulldrop proc p111gocreate proc p111 ASselect object_id('tempdb..#t')create table #t(id int)select object_id('tempdb..#t')insert #t select 3select * from #tgoif object_id('p222','p') is not nulldrop proc p222gocreate proc p222 asif object_id('tempdb..#t') is NOT NULLBEGIN    select 2    select object_id('tempdb..#t')    exec p111END elsebegin    create table #t(id int)    insert #t exec p111ENDselect object_id('tempdb..#t')select * from #tGOif object_id('p333','p') is not nulldrop proc p333gocreate proc p333 AScreate table #t(id int)select object_id('tempdb..#t')INSERT #t SELECT 1insert #t exec p222select * from #tgoexec p333 

 

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