动态 SQL 结果存入 SQL 存储过程中的临时表

发布于 2024-07-15 11:58:41 字数 368 浏览 10 评论 0原文

代码如下:

ALTER PROCEDURE dbo.pdpd_DynamicCall 
@SQLString varchar(4096) = null

AS

Begin

    create TABLE #T1 ( column_1 varchar(10) , column_2 varchar(100) )

    insert into #T1 
        execute ('execute ' + @SQLString )

    select * from #T1 

End

问题是我想调用可以返回不同列的不同过程。 因此我必须通用地定义表#T1。 但我不知道怎么办。

谁能帮我解决这个问题吗?

The code is as follows:

ALTER PROCEDURE dbo.pdpd_DynamicCall 
@SQLString varchar(4096) = null

AS

Begin

    create TABLE #T1 ( column_1 varchar(10) , column_2 varchar(100) )

    insert into #T1 
        execute ('execute ' + @SQLString )

    select * from #T1 

End

The problem is that I want to call different procedures that can give back different columns.
Therefore I would have to define the table #T1 generically.
But I don't know how.

Can anyone help me on this problem?

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评论(9

戏蝶舞 2024-07-22 11:58:41

尝试一下:

SELECT into #T1 execute ('execute ' + @SQLString )

这听起来真的很糟糕,就像 SQL 注入漏洞一样。


更正(根据 @CarpeDiem 的评论):

INSERT into #T1 execute ('execute ' + @SQLString )

如果 sql 字符串不是过程,则省略 'execute'

Try:

SELECT into #T1 execute ('execute ' + @SQLString )

And this smells real bad like an sql injection vulnerability.


correction (per @CarpeDiem's comment):

INSERT into #T1 execute ('execute ' + @SQLString )

also, omit the 'execute' if the sql string is something other than a procedure

终止放荡 2024-07-22 11:58:41

您可以动态定义表,就像动态插入表一样,但问题在于临时表的范围。 例如,以下代码:

DECLARE @sql varchar(max)
SET @sql = 'CREATE TABLE #T1 (Col1 varchar(20))'
EXEC(@sql)
INSERT INTO #T1 (Col1) VALUES ('This will not work.')
SELECT * FROM #T1

将返回错误“无效的对象名称'#T1'”。 这是因为临时表#T1 是在比执行代码块“更低的级别”创建的。 为了解决这个问题,请使用全局临时表:

DECLARE @sql varchar(max)
SET @sql = 'CREATE TABLE ##T1 (Col1 varchar(20))'
EXEC(@sql)
INSERT INTO ##T1 (Col1) VALUES ('This will work.')
SELECT * FROM ##T1

希望这有帮助,
杰西

You can define a table dynamically just as you are inserting into it dynamically, but the problem is with the scope of temp tables. For example, this code:

DECLARE @sql varchar(max)
SET @sql = 'CREATE TABLE #T1 (Col1 varchar(20))'
EXEC(@sql)
INSERT INTO #T1 (Col1) VALUES ('This will not work.')
SELECT * FROM #T1

will return with the error "Invalid object name '#T1'." This is because the temp table #T1 is created at a "lower level" than the block of executing code. In order to fix, use a global temp table:

DECLARE @sql varchar(max)
SET @sql = 'CREATE TABLE ##T1 (Col1 varchar(20))'
EXEC(@sql)
INSERT INTO ##T1 (Col1) VALUES ('This will work.')
SELECT * FROM ##T1

Hope this helps,
Jesse

爱给你人给你 2024-07-22 11:58:41

请小心全局临时表解决方案,因为如果两个用户同时使用相同的例程,则可能会失败,因为所有用户都可以看到全局临时表...

Be careful of a global temp table solution as this may fail if two users use the same routine at the same time as a global temp table can be seen by all users...

骷髅 2024-07-22 11:58:41

动态创建名称中包含 GUID 的全局临时表。 然后您可以通过 dyn sql 在代码中使用它,而不必担心调用相同存储过程的另一个进程会使用它。 当您不知道每次运行时底层选定表会发生什么时,这非常有用,因此您无法事先显式创建临时表。 即 - 您需要使用 SELECT * INTO 语法

DECLARE @TmpGlobalTable varchar(255) = 'SomeText_' + convert(varchar(36),NEWID())

-- select @TmpGlobalTable 

-- build query
    SET @Sql = 
        'SELECT * INTO [##' + @TmpGlobalTable + '] FROM SomeTable'
EXEC (@Sql)
EXEC ('SELECT * FROM [##' + @TmpGlobalTable + '] ')
EXEC ('DROP TABLE [##' + @TmpGlobalTable + ']')
PRINT 'Dropped Table ' + @TmpGlobalTable 

create a global temp table with a GUID in the name dynamically. Then you can work with it in your code, via dyn sql, without worry that another process calling same sproc will use it. This is useful when you dont know what to expect from the underlying selected table each time it runs so you cannot created a temp table explicitly beforehand. ie - you need to use SELECT * INTO syntax

DECLARE @TmpGlobalTable varchar(255) = 'SomeText_' + convert(varchar(36),NEWID())

-- select @TmpGlobalTable 

-- build query
    SET @Sql = 
        'SELECT * INTO [##' + @TmpGlobalTable + '] FROM SomeTable'
EXEC (@Sql)
EXEC ('SELECT * FROM [##' + @TmpGlobalTable + '] ')
EXEC ('DROP TABLE [##' + @TmpGlobalTable + ']')
PRINT 'Dropped Table ' + @TmpGlobalTable 
客…行舟 2024-07-22 11:58:41
INSERT INTO #TempTable
EXEC(@SelectStatement)
INSERT INTO #TempTable
EXEC(@SelectStatement)
白色秋天 2024-07-22 11:58:41

尝试下面的代码,使用 T-SQL 从存储过程输出动态创建临时表

declare @ExecutionName varchar(1000) = 'exec [spname] param1,param2 '
declare @sqlStr varchar(max) = ''

   declare @tempTableDef nvarchar(max) =   
  (  
  SELECT distinct   
   STUFF(  
    (  
     SELECT ','+a.[name]+' '+[system_type_name]  
  +'  
   ' AS [text()]  
     FROM sys.dm_exec_describe_first_result_set  (@ExecutionName, null, 0) a  
     ORDER BY a.column_ordinal  
     FOR XML PATH ('')  
    ), 1, 1, '') tempTableDef   

  FROM sys.dm_exec_describe_first_result_set  (@ExecutionName, null, 0) b  
  )  

  IF ISNULL(@tempTableDef ,'') = '' RAISERROR( 'Invalid SP Configuration. At least one column is required in Select list of SP output.',16,1) ;    
                                      
  set @tempTableDef='CREATE TABLE #ResultDef   
  (  
  ' + REPLACE(@tempTableDef,'
','') +'  
  )  

  INSERT INTO #ResultDef   
  ' + @ExecutionName    
          
  Select  @sqlStr  = @tempTableDef +' Select * from  #ResultDef '   
exec(@sqlStr)

Try Below code for creating temp table dynamically from Stored Procedure Output using T-SQL

declare @ExecutionName varchar(1000) = 'exec [spname] param1,param2 '
declare @sqlStr varchar(max) = ''

   declare @tempTableDef nvarchar(max) =   
  (  
  SELECT distinct   
   STUFF(  
    (  
     SELECT ','+a.[name]+' '+[system_type_name]  
  +'  
   ' AS [text()]  
     FROM sys.dm_exec_describe_first_result_set  (@ExecutionName, null, 0) a  
     ORDER BY a.column_ordinal  
     FOR XML PATH ('')  
    ), 1, 1, '') tempTableDef   

  FROM sys.dm_exec_describe_first_result_set  (@ExecutionName, null, 0) b  
  )  

  IF ISNULL(@tempTableDef ,'') = '' RAISERROR( 'Invalid SP Configuration. At least one column is required in Select list of SP output.',16,1) ;    
                                      
  set @tempTableDef='CREATE TABLE #ResultDef   
  (  
  ' + REPLACE(@tempTableDef,'
','') +'  
  )  

  INSERT INTO #ResultDef   
  ' + @ExecutionName    
          
  Select  @sqlStr  = @tempTableDef +' Select * from  #ResultDef '   
exec(@sqlStr)
欢烬 2024-07-22 11:58:41
DECLARE @EmpGroup INT =3 ,
        @IsActive BIT=1

DECLARE @tblEmpMaster AS TABLE
        (EmpCode VARCHAR(20),EmpName VARCHAR(50),EmpAddress VARCHAR(500))

INSERT INTO @tblEmpMaster EXECUTE SPGetEmpList @EmpGroup,@IsActive

SELECT * FROM @tblEmpMaster
DECLARE @EmpGroup INT =3 ,
        @IsActive BIT=1

DECLARE @tblEmpMaster AS TABLE
        (EmpCode VARCHAR(20),EmpName VARCHAR(50),EmpAddress VARCHAR(500))

INSERT INTO @tblEmpMaster EXECUTE SPGetEmpList @EmpGroup,@IsActive

SELECT * FROM @tblEmpMaster
一世旳自豪 2024-07-22 11:58:41
CREATE PROCEDURE dbo.pdpd_DynamicCall 
AS
DECLARE @SQLString_2 NVARCHAR(4000)
SET NOCOUNT ON
Begin
    --- Create global temp table
    CREATE TABLE ##T1 ( column_1 varchar(10) , column_2 varchar(100) )

    SELECT @SQLString_2 = 'INSERT INTO ##T1( column_1, column_2) SELECT column_1 = "123", column_2 = "MUHAMMAD IMRON"'
    SELECT @SQLString_2 = REPLACE(@SQLString_2, '"', '''')

    EXEC SP_EXECUTESQL @SQLString_2

    --- Test Display records
    SELECT * FROM ##T1

    --- Drop global temp table 
    IF OBJECT_ID('tempdb..##T1','u') IS NOT NULL
    DROP TABLE ##T1
End
CREATE PROCEDURE dbo.pdpd_DynamicCall 
AS
DECLARE @SQLString_2 NVARCHAR(4000)
SET NOCOUNT ON
Begin
    --- Create global temp table
    CREATE TABLE ##T1 ( column_1 varchar(10) , column_2 varchar(100) )

    SELECT @SQLString_2 = 'INSERT INTO ##T1( column_1, column_2) SELECT column_1 = "123", column_2 = "MUHAMMAD IMRON"'
    SELECT @SQLString_2 = REPLACE(@SQLString_2, '"', '''')

    EXEC SP_EXECUTESQL @SQLString_2

    --- Test Display records
    SELECT * FROM ##T1

    --- Drop global temp table 
    IF OBJECT_ID('tempdb..##T1','u') IS NOT NULL
    DROP TABLE ##T1
End

不确定我是否理解得很好,但也许你可以在字符串中形成 CREATE 语句,然后执行该字符串? 这样您就可以添加任意数量的列。

Not sure if I understand well, but maybe you could form the CREATE statement inside a string, then execute that String? That way you could add as many columns as you want.

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