Insert 语句死锁

Question

使用存储过程将我的列表视图中的一系列记录插入到我的 SQL 服务器 table。但是我遇到了如下图所示的死锁

这是我的程序：

declare @debtorCollectorHistoryId bigint

set @debtorCollectorHistoryId = (Select top 1 id 
                                 from FVOfficer with(nolock) 
                                 where debtorid = @debtorid 
                                 order by id desc)

if @currentFvCollectorid  is null
   set @currentFvCollectorid = (SELECT FvCollectorID 
                                from Debtor with(nolock) 
                                where id = @debtorid)

if @assignon is null
   set @assignon = GETDATE()

      print @debtorCollectorHistoryId
       print @currentFvCollectorid
      print @newFvCollectorid



    if @currentFvCollectorid <> @newFvCollectorid
    BEGIN
        if @currentFvCollectorid <> 0
        Begin   
            update FVOfficer 
            set terminateon = GetDate()
            where id = @debtorCollectorHistoryId
        End

        Begin
        --create new Collector History for new collector
        --NOTE: CurrentCollectorID is a previous collectorID for new Collector History

        insert into FVOfficer (debtorid, prevCollectorID, collectorid, assignon, terminateon, loginID)
        values (@debtorid,@currentFvCollectorid, @newFvCollectorid, GetDate(), null, @loginID)
        print' create new Collector History for new FV collector'

        exec dbo.[ValidatePrevFVCollectorByDebtorID] @debtorid
    end
    begin
        print @debtorid
        update Debtor set FVCollectorid = @newFvCollectorid where id = @debtorid 
    end

根据我的快照，我假设死锁发生在 table 'FVOfficer' 上，但我的 currentFvCollectorid 始终为 0，因此没有执行任何更新语句。但是，我将我的@debtorid 传递给过程 [ValidatePrevCollectorByDebtorID]，该过程使用不同的 table 而不是 FVOfficer table 上的游标执行一些验证。可能是参数 @debtorid 被第二个过程锁定，而它在插入中是必需的吗？如果是，请问我该如何解决。

当我检查我的 table FVOfficer 时，我注意到它没有主键或任何索引，我索引了 id 列，它是一个 identity(1,1) 列。我在 id 上创建了聚集索引，但这并没有解决我的问题。请问我该如何进行呢？

更新下面是我的 [ValidatePrevFVCollectorByDebtorID] 请问这与问题有什么关系吗？

DECLARE @ID AS BIGINT

--LOOP ALL THE DEBTOR COLLECTOR HISTORY ID
----------------------------------------------------------------------------    
DECLARE LOOPDEBTOR_CURSOR CURSOR
    FOR  SELECT ID FROM DEBTOR WITH(NOLOCK) WHERE  ID = @REFDEBTORID
    --WHERE COLLECTORID > 0 

OPEN LOOPDEBTOR_CURSOR

FETCH NEXT FROM LOOPDEBTOR_CURSOR INTO @ID


WHILE @@FETCH_STATUS = 0
BEGIN
    DECLARE @COLLECTORYHISTORYID AS BIGINT
    DECLARE @ASSIGNON AS DATETIME
    DECLARE @DEBTORID AS BIGINT
    DECLARE @COLLECTORID AS BIGINT



    DECLARE @PREVCOLLECTORID AS BIGINT 

    --GET THE 1ST HISTORY ID BASE ON DEBTORID
    ---------------------------------------------------------------------------         
    DECLARE @FIRSTID AS BIGINT
    SET @FIRSTID = (SELECT TOP 1 ID FROM  FVOFFICER WITH(NOLOCK) 
        WHERE DEBTORID = @ID ORDER BY ID  )

    -- LIST ALL THE DEBTOR COLLECTOR HISTORY BASE ON DEBTORID = @ID
    ---------------------------------------------------------------------------         
    DECLARE LOOPHISTORY_CURSOR CURSOR
        FOR  SELECT ID,DEBTORID,COLLECTORID,ASSIGNON FROM FVOFFICER 
        WHERE DEBTORID = @ID ORDER BY ID ASC
    OPEN LOOPHISTORY_CURSOR

    FETCH NEXT FROM LOOPHISTORY_CURSOR INTO 
        @COLLECTORYHISTORYID,@DEBTORID,@COLLECTORID,@ASSIGNON

    WHILE @@FETCH_STATUS = 0
    BEGIN


        --FIX PREV COLLECTOR ID VALUE
        IF @FIRSTID != @COLLECTORYHISTORYID
            UPDATE  FVOFFICER SET PREVCOLLECTORID = @PREVCOLLECTORID 
            WHERE ID = @COLLECTORYHISTORYID                                                             

        SET @PREVCOLLECTORID = @COLLECTORID

    FETCH NEXT FROM LOOPHISTORY_CURSOR INTO 
        @COLLECTORYHISTORYID,@DEBTORID,@COLLECTORID,@ASSIGNON
    END

    CLOSE LOOPHISTORY_CURSOR
    DEALLOCATE LOOPHISTORY_CURSOR

FETCH NEXT FROM LOOPDEBTOR_CURSOR INTO @ID


END


CLOSE LOOPDEBTOR_CURSOR
DEALLOCATE LOOPDEBTOR_CURSOR

Answer 1

抱歉，我把错误的过程作为我的 'ValidatePrevFVCollectorByDebtorID' 发布了。经过深思熟虑。我知道锁定发生在程序 ValidatePrevFVCollectorByDebtorID at

 DECLARE LOOPHISTORY_CURSOR CURSOR
        FOR  SELECT ID,DEBTORID,COLLECTORID,ASSIGNON FROM FVOFFICER 
        WHERE DEBTORID = @ID ORDER BY ID ASC
    OPEN LOOPHISTORY_CURSOR

债务人被锁定在上面。由于我在循环中执行批量插入，因此调用了新的插入实例，但是 debtorid 被锁定在前一个 task/cursor 上。首先

1 我在下面的 select 语句中添加了关键字 with(nolock)

SELECT ID,DEBTORID,COLLECTORID,ASSIGNON FROM FVOFFICER with(nolock)
                WHERE DEBTORID = @ID ORDER BY ID ASC

然后我在 table FVOfficer 的列 debtorid 上添加了一个非聚集索引以提高我的 select 语句的速度。在我运行之后，死锁没有发生。

Insert 语句死锁

Deadlock on Insert statement

sql-server

deadlock

stored-procedures