sql - 如何在SQL Server 2005中调用表值函数中的存储过程？

Question

我想调用返回表值函数中的表的存储过程。如何创建表值函数？

例如:“sp_GetTable”是存储过程。它返回一个表。在这里，我想编写一个名为“fn_GetTable”的函数

我想得到与存储过程给出的相同结果。

这是我的存储过程:

ALTER PROC sp_GetTable
AS
BEGIN

------------ Creating TempTable(#MasterTable) ----------------------
    CREATE TABLE #MasterTable
    (ItemID INT, ItemName VARCHAR(100), Specifications VARCHAR(100), D1 VARCHAR(50),   D2 VARCHAR(50), D3 VARCHAR(50), 
        D1_Code VARCHAR(50), D2_Code VARCHAR(50), D3_Code VARCHAR(50))

------------ Creating TempTable(#TempItems) ----------------------

    CREATE TABLE #TempItems(ItemID INT, ItemName VARCHAR(100), Specifications VARCHAR(100), D1 VARCHAR(50), D2 VARCHAR(50), D3 VARCHAR(50),
                 D1_Code VARCHAR(50), D2_Code VARCHAR(50), D3_Code VARCHAR(50))
------------ Creating & Inserting TempTable(@Dim) ----------------------

    DECLARE @Dim TABLE (DCodes VARCHAR(100))
    INSERT INTO @Dim SELECT  D1_Code FROM MAS_SizeType WHERE  D1_Code <> ''
    INSERT INTO @Dim SELECT  D2_Code FROM MAS_SizeType WHERE  D2_Code <> ''
    INSERT INTO @Dim SELECT  D3_Code FROM MAS_SizeType WHERE  D3_Code <> ''

------------ Inserting data into TempTable(#MasterTable) ----------------------

    INSERT INTO #MasterTable
    SELECT     STR_Item.ItemID, STR_Item.ItemName, STR_Item_Specifications.SpecificationName, 
        STR_Item.D1, STR_Item.D2, STR_Item.D3, MAS_SizeType.D1_Code, MAS_SizeType.D2_Code, 
                  MAS_SizeType.D3_Code
    FROM         STR_Item INNER JOIN
                  MAS_SizeType ON STR_Item.SizeTypeID = MAS_SizeType.SizeTypeID INNER JOIN
                  STR_Item_Specifications ON STR_Item.SpecificationID = STR_Item_Specifications.SpecificationID

-------------------- Inserting Data into #TempItems Table ----------------------------
INSERT INTO #TempItems
SELECT 
      *
FROM #MasterTable

------------------Cursor for All dimensions details into single row for each items ----------------------

   DECLARE @DCode VARCHAR(MAX), @Cnt INT
   SET @Cnt = 0

   DECLARE ColAdd CURSOR FOR
   SELECT DISTINCT DCodes FROM @Dim
   OPEN ColAdd
   FETCH NEXT FROM ColAdd INTO @DCode
   WHILE (@@FETCH_STATUS = 0)
   BEGIN
  SET @Cnt = 1
  EXECUTE ('ALTER TABLE #TempItems ADD ' + @DCode + ' VARCHAR(50)')
  EXECUTE('UPDATE #TempItems SET [' + @DCode + '] = M.D1
                FROM #MasterTable M 
            INNER JOIN #TempItems T ON T.ItemID = M.ItemID AND M.D1_Code = ''' + @DCode + '''')
  EXECUTE('UPDATE #TempItems SET [' + @DCode + '] = M.D2
                FROM #MasterTable M 
            INNER JOIN #TempItems T ON T.ItemID = M.ItemID AND M.D2_Code = ''' + @DCode + '''')
  EXECUTE('UPDATE #TempItems SET [' + @DCode + '] = M.D3
                FROM #MasterTable M 
            INNER JOIN #TempItems T ON T.ItemID = M.ItemID AND M.D3_Code = ''' + @DCode + '''')


    FETCH NEXT FROM ColAdd INTO @DCode
    END
    CLOSE ColAdd
    DEALLOCATE ColAdd
    IF (@Cnt = 1)
    BEGIN

    SELECT  @DCode = STUFF(( SELECT  DISTINCT '],[' + ltrim(DCodes) 
                        FROM  @Dim 
                        ORDER BY '],[' + ltrim(DCodes)
                        FOR XML PATH('')

                                    ), 1, 2, '') + ']'

   EXECUTE ('SELECT ItemID, ItemName, Specifications, ' + @DCode + ' FROM #TempItems ORDER BY ItemName') 
   END

    DROP TABLE #TempItems
    DROP TABLE #MasterTable

END

Answer 1

可以在标量函数中执行此操作， 无法从表值函数中执行此操作。标量函数返回单个数据类型值，也不能返回表。由于您无法从存储过程中进行选择(您需要EXEC)，因此在表值函数中没有位置。

In general, if the stored procedure returns a, single, result set, define a table-valued function. If the stored procedure computes a scalar value, define a scalar function.

来自:Rewriting Stored Procedures as Functions

将存储过程重写为表值函数将为您带来最佳性能。