Question

这是一个基于好奇心的问题。我试图解决以下问题：

我的存储过程在运行1-2秒内产生结果，没有问题。
当我通过SSRS运行我的proc时，页面在加载时卡住，并且永远不会产生结果。需要大约30秒 - 一分钟才能解开并退出处理查询。
我在我的变量上引用/加入的任何表都具有SAME数据类型char（3）。

以下是代码：

ALTER PROC [dbo].[Inventory_pr_rpt_Scanfile_InvalidColorSize]

(
    @STORE CHAR(3)
)
AS


--set statistics io on 


/** TEST **/

    --DECLARE   @STORE CHAR(3)
    --SET       @STORE = '180'


/** Drop existing temp table **/ 

    IF OBJECT_ID('tempdb..#TEMP_ScanBadData') IS NOT NULL
    DROP TABLE #TEMP_ScanBadData

    IF OBJECT_ID('tempdb..#TEMP_ScanDiscrepancy') IS NOT NULL
    DROP TABLE #TEMP_ScanDiscrepancy

    IF OBJECT_ID('tempdb..#TEMP_ScanFinalReport') IS NOT NULL
    DROP TABLE #TEMP_ScanFinalReport    


    CREATE TABLE #TEMP_ScanBadData (scan_store char(3)
                                      ,scan_sku char(45)
                                      ,scan_qty int
                                      ,errormessage varchar(255))

    CREATE TABLE #TEMP_ScanFinalReport(scan_store char(3)
                                      ,scan_sku char(45)
                                      ,scan_qty int
                                      ,storeOH_qty int
                                      ,errormessage varchar(255))   

    CREATE TABLE #TEMP_ScanDiscrepancy(scan_store char(3)
                                      ,scan_sku char(45)
                                      ,scan_qty int
                                      ,storeOH_qty int
                                      ,errormessage varchar(255))                             

/** Does SKU exist in our system? (Valid color/size/style check) **/
INSERT INTO #TEMP_ScanBadData (scan_store
                                      ,scan_sku
                                      ,scan_qty
                                      ,errormessage)
    SELECT scan_store
        ,scan_sku
        ,scan_qty
        ,'SKU does not exist.' as errormessage           
    FROM [LP].[dbo].[scan_file]
    WHERE scan_sku NOT IN (SELECT ItemID
                           FROM [Product].[dbo].[MasterSKU])
    AND scan_store = @STORE



/** Does scanned SKU exist in store on hand? **/
    INSERT INTO #TEMP_ScanDiscrepancy (scan_store
                                      ,scan_sku
                                      ,scan_qty
                                      ,storeOH_qty
                                      ,errormessage)    
    SELECT aa.scan_store 
          ,aa.scan_sku
          ,aa.scan_qty
          ,'' as storeOH_qty
          ,'Scanned SKU missing in store OH.' as errormessage
    FROM [LP].[dbo].[scan_file] aa
    FULL OUTER JOIN [Product].[dbo].[CurrentOnHand] bb
            ON aa.scan_sku = bb.ItemID
            and aa.scan_store = bb.Store 
    WHERE bb.ItemID IS NULL
    AND aa.scan_store = @STORE
    and bb.Store = @STORE


/** Were any store OH SKU's missed in scan? **/
    INSERT INTO #TEMP_ScanDiscrepancy (scan_store
                                      ,scan_sku
                                      ,scan_qty
                                      ,storeOH_qty
                                      ,errormessage)    
    SELECT aa.Store   as 'scan_store'
          ,aa.ItemId  as 'scan_sku'
          ,aa.OnHandU as 'scan_qty'
          ,'' as storeOH_qty
          ,'SKU was not scanned.' as errormessage
    FROM [Product].[dbo].[CurrentOnHand] aa
    LEFT JOIN [LP].[dbo].[scan_file] bb
            ON aa.ItemID = bb.scan_sku
            and aa.Store = bb.scan_store 
    WHERE bb.scan_sku IS NULL
    AND aa.Store = @STORE
    and bb.scan_store = @STORE

/** What are the qty differences between scanned and OH? **/
    INSERT INTO #TEMP_ScanDiscrepancy (scan_store
                                      ,scan_sku
                                      ,scan_qty
                                      ,storeOH_qty
                                      ,errormessage)    
    SELECT aa.scan_store
        ,aa.scan_sku
        ,aa.scan_qty
        ,bb.OnHandU as 'storeOH_qty'
        ,'QTY does not match between scan and store OH.' as errormessage
    FROM [LP].[dbo].[scan_file] aa
    JOIN [Product].[dbo].[CurrentOnHand] bb
        ON bb.ItemId = aa.scan_sku
        AND aa.scan_store = bb.Store        
    WHERE bb.Store = @STORE
    AND bb.OnHandU <> aa.scan_qty   
    AND aa.scan_store = @STORE


      INSERT INTO #TEMP_ScanFinalReport (scan_store
      ,scan_sku
      ,scan_qty
      ,storeOH_qty
      ,errormessage)    
      SELECT scan_store 
          ,scan_sku 
          ,scan_qty 
          ,storeOH_qty 
          ,errormessage 
      FROM #TEMP_ScanDiscrepancy    

    INSERT INTO #TEMP_ScanFinalReport (scan_store
      ,scan_sku
      ,scan_qty
      ,storeOH_qty
      ,errormessage)    
      SELECT scan_store 
          ,scan_sku 
          ,scan_qty 
          ,'' as storeOH_qty 
          ,errormessage 
      FROM #TEMP_ScanBadData    

      SELECT *
      FROM #TEMP_ScanFinalReport

解决方案：在尝试VARCHAR（3）和CHAR（3）后，我尝试了NCHAR（3），这很有用！

我的问题是：为什么？如果我查看了我引用的每个表，并看到Store的列始终是CHAR（3），我创建的所有临时表都是CHAR（3），为什么NCHAR（3）有效？

我觉得它与SSRS如何将文本变量传递到存储过程中有关...但是对于我如何在sql服务器上运行存储过程仍然没有意义。变量设置为CHAR，VARCHAR和NCHAR。为什么这三个都在sql server上工作，但只有NCHAR通过SSRS使用变量？

表格信息：

[LP]。[DBO]。[scan_file]
- scan_store CHAR（3）
[产品]。[DBO]。[CurrentOnHand]
- Store VARCHAR（4）

当引用的列是char时，为什么nchar变量有效？

0 个答案: