在 SQL Server 2012 中插入临时表时出现问题

Question

我正在尝试将 XML 列中的一些 XML 数据插入到 SQL Server 2012 中的临时表中。

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。当我第二次运行它时，它应该删除临时表，但我得到了这个错误：

#temp 不存在！创建表

消息 2714，第 16 级，状态 6，第 11 行
数据库中已经有一个名为“#txn”的对象。

我不知道你们是否建议我使用临时表或在我的数据库中创建一个真实表来管理这种情况？

Answer 1

这个

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

应该是

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

你甚至可以侥幸逃脱：

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

一旦你做出这个改变，你就不再需要大的 IF 语句来检查这个了。

Answer 2

帮自己一个忙，不要使用那个古老的 XML 过程 OPENXML。 而是使用 .nodes 和 .value

您甚至可以使用 XQuery 谓词代替 WHERE 子句

SELECT CASE
        WHEN trans.value('(shop/code/text())[1]','varchar(100)') = '1' THEN '01'
        END as accountcode,
        trans.value('(shop/description/text())[1]','varchar(100)') tienda,
        trans.value('(till/code/text())[1]','varchar(100)') caja,
        trans.value('(cashier/code/text())[1]','varchar(100)') cajero,
        trans.value('(beginning-timestamp/text())[1]','varchar(100)') fecha,
        trans.value('(trans-num/text())[1]','varchar(100)') transaccion,
        item.value('(code/text())[1]','varchar(100)') itemcode,
        item.value('(description/text())[1]','varchar(100)') description,
        v.quantity,
        v.weight,
        CASE
            WHEN v.quantity is null THEN v.weight
            WHEN v.weight is null THEN v.quantity
        END as qty_weight,
        item.value('(unit-price/text())[1]','numeric(15,3)') unitprice,
        item.value('(taxable-amount/text())[1]','numeric(15,3)') 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,
        item.value('(hash-code/text())[1]','int') hashcode,
        item.value('(delete-operator-id/text())[1]','varchar(100)') anulado

FROM [dbo].[XmlImport] xi
CROSS APPLY xi.[LoadedXML].nodes('tcpos-export/transactions/transaction') x1(trans)
CROSS APPLY x1.trans.nodes('trans-item[
    hash-code/text() and
    not( unit-price[contains(text()[1], "-")] ) and
    not( taxable-amount[contains(text()[1], "-")] ) and
    not( delete-operator-id/text() )
]') x2(item)
CROSS APPLY (VALUES (
    item.value('(quantity/text())[1]','numeric(10,3)'),
    item.value('(weight/text())[1]','numeric(10,3)'),
    item.value('(vat-code/text())[1]','varchar(100)')
) ) v(quantity, weight, vatcode)

ORDER BY hashcode;