在 SQL Server 2012 中插入临时表的问题

I'm trying to insert some XML data from a XML column into a temp table in SQL Server 2012.

这是我当前的查询

DECLARE @XML AS XML, @hDoc AS INT, @SQL NVARCHAR (MAX)

IF OBJECT_ID('tempdb..dbo.#txn','u') IS NOT NULL
BEGIN
    PRINT '#temp exists! drop table'
    DROP TABLE tempdb.dbo.#txn;
END
ELSE
BEGIN
    PRINT '#temp does not exist! create table'

    CREATE TABLE #txn
    (
        accountcode varchar(100),
        tienda varchar(100),
        caja varchar(100),
        cajero varchar(100),
        fecha varchar(100),
        transaccion varchar(100),
        itemcode varchar(100),
        description varchar(100),
        quantity numeric(10,3),
        weight numeric(10,3),
        qty_weight numeric(10,3),
        unitprice numeric(15,3),
        totalprice numeric(15,3),
        vatcode varchar(100),
        hashcode varchar(100),
        anulado varchar(100)    
    )
END

SELECT @XML = [LoadedXML] FROM [dbo].[XmlImport]

EXEC sp_xml_preparedocument @hDoc OUTPUT, @XML

INSERT INTO #txn (accountcode, tienda, caja, cajero, fecha, transaccion, itemcode, description, quantity, weight, qty_weight, unitprice, totalprice, vatcode, hashcode, anulado)

    SELECT 
        CASE
            WHEN codigotienda = 1 THEN '01'
        END as accountcode,
        tienda,
        caja,
        cajero,
        fecha,
        transaccion,
        itemcode,
        description,
        quantity,
        weight,
        CASE
            WHEN quantity IS NULL THEN weight
            WHEN weight IS NULL THEN quantity
        END as qty_weight,
        unitprice,
        totalprice,
        CASE
            WHEN vatcode = 4 THEN 'V0'
            WHEN vatcode = 1 THEN 'V1'
            WHEN vatcode = 2 THEN 'V2'
            WHEN vatcode = 3 THEN 'V3'
            WHEN vatcode is NULL THEN 'V0'
        END AS vatcode,
        hashcode,
        anulado
    FROM 
        OPENXML(@hDoc, 'tcpos-export/transactions/transaction/trans-item') 
    WITH 
        (
            codigotienda [varchar](100) '../shop/code',
            tienda [varchar](100) '../shop/description',
            caja [varchar](100) '../till/code',
            cajero [varchar](100) '../cashier/code',
            fecha [varchar](100) '../beginning-timestamp',
            transaccion [varchar](100) '../trans-num',
            itemcode [varchar](100) 'code',
            description [varchar](100) 'description',
            quantity numeric(10,3) 'quantity',
            weight numeric(10,3) 'weight',
            unitprice numeric(15,3) 'unit-price',
            totalprice numeric(15,3) 'taxable-amount',
            vatcode [varchar](100) 'vat-code',
            hashcode [varchar](100) 'hash-code',
            anulado [varchar](100) 'delete-operator-id'
         )

SELECT * 
FROM #txn
WHERE hashcode IS NOT NULL
  AND totalprice NOT LIKE '%-%'
  AND unitprice NOT LIKE '%-%'
  AND anulado IS NULL
ORDER BY 
  CAST(hashcode AS int)

--LEFT JOIN [MAXIMERCADODEMO].[dbo].OITM sap

--ON #txn.itemcode = sap.itemcode COLLATE SQL_Latin1_General_CP1_CI_AS

--where #txn.itemcode is null

--SELECT #txn.itemcode FROM #txn

--LEFT JOIN [MAXIMERCADODEMO].[dbo].OITM sap

--ON #txn.itemcode = sap.itemcode COLLATE SQL_Latin1_General_CP1_CI_AS

--where #txn.itemcode is null

EXEC sp_xml_removedocument @hDoc

这是第一次有效.当我第二次运行它时，它应该删除临时表，但我收到了这个错误:

 IF OBJECT_ID('tempdb..#txn','u') IS NOT NULL

 IF OBJECT_ID('tempdb..#txn', 'u') IS NOT NULL DROP TABLE #txn;

 IF OBJECT_ID('tempdb..#txn') IS NOT NULL