Question

我正在使用SQL Server 2012中的存储过程中的OPENXML读取XML数据。

我的XML：

<name>
    <name>Temp1</name>
    <data>
        <mealID>5</mealID>
        <food>
            <foodID>11</foodID>
        </food>
        <food>
            <foodID>12</foodID>
        </food>
    </data>
    <data>
        <mealID>6</mealID>
        <food>
           <foodID>13</foodID>
        </food>
    </data>
</name>

我的存储过程：

ALTER PROCEDURE [dbo].[sp_Insert_EatingProgramTemplate] 
    @Template xml,
    @intOutSuccess nvarchar(10) OUTPUT,
    @ErrorSeverity nvarchar(MAX) OUTPUT,
    @ErrorMesg nvarchar(MAX) OUTPUT
AS
BEGIN
    DECLARE @idoc int

    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    SET @ErrorSeverity = ''
    SET @ErrorMesg = ''
    SET @intOutSuccess = ''

    BEGIN TRY
        SELECT *
         FROM OPENXML (@idoc, '/ROOT/Customer',1)
         WITH (CustomerID  varchar(10),
               ContactName varchar(20))
        SET @intOutSuccess = 1
    END TRY
    BEGIN CATCH
        SET @ErrorSeverity = ERROR_SEVERITY()  
        SET @ErrorMesg = ERROR_MESSAGE() 
        SET @intOutSuccess = -1
        GOTO A
    END CATCH
A:
    END
GO

执行此程序时，我收到此错误：

无法找到带句柄0的预准备语句

任何帮助，为什么我收到此错误？

Answer 1

您错过了通过调用@idoc设置sp_xml_preparedocument，例如：

declare @template xml = '<name>
    <name>Temp1</name>
    <data>
        <mealID>5</mealID>
        <food>
            <foodID>11</foodID>
        </food>
        <food>
            <foodID>12</foodID>
        </food>
    </data>
    <data>
        <mealID>6</mealID>
        <food>
           <foodID>13</foodID>
        </food>
    </data>
</name>'
DECLARE @idoc int
EXEC sp_xml_preparedocument @idoc OUTPUT, @template; 

SELECT *
     FROM OPENXML (@idoc, '/name/data/food/foodID',1)
     WITH (FoodID  INT '.',
           MealID INT '../../mealID')

--clear parsed XML document from SQL Server cache
EXEC sp_xml_removedocument @idoc;

您也可以通过直接查询xml变量来实现相同的输出：

SELECT 
    x.value('.', 'int') as FoodID
    , x.value('../../mealID[1]', 'int') as MealID
FROM @template.nodes('/name/data/food/foodID') as T(X)

使用OPENXML读取XML时出错

1 个答案: