为什么我的 UPDATE 语句没有完成？

Question

运行 SQL Server 2008；Mgmt Studio 2008。我正在处理我们为 MS CRM 4.0 实施创建的 MS SQL 作业。对于熟悉 CRM 的任何人来说，这项工作每晚清除 aSyncOperationBase 表以节省数据库大小。这是工作代码：

    Begin Transaction T1

Declare @p30Days as DateTime
Declare @p3Years as DateTime

Set @p30Days = DateAdd(d, -30, GetDate())
Set @p3Years = DateAdd(d, -1095, GetDate())

update AsyncOperationBase 
set deletionstatecode=2    
where deletionstatecode = 0 and 
statecode = 3 and 
completedon is not null and 
completedon < @p30Days   
and OperationType <> 10

update AsyncOperationBase 
set deletionstatecode=2    
where deletionstatecode = 0 and 
statecode = 3 and 
completedon is not null and 
completedon < @p3Years   
and OperationType = 10

delete from workflowlogbase    
where AsyncOperationid in (select AsyncOperationid from AsyncOperationBase where deletionstatecode=2)   

update DuplicateRecordBase 
set DeletionStateCode = 2    
where asyncoperationid in    
(select DuplicateRecordBase.asyncoperationid 
    from DuplicateRecordBase    
        left join asyncoperationbase on (DuplicateRecordBase.asyncoperationid=asyncoperationbase.asyncoperationid and    
        asyncoperationbase.deletionstatecode = 0) 
    where asyncoperationbase.asyncoperationid is null)    

update BulkDeleteOperationBase 
set DeletionStateCode = 2    
where asyncoperationid in    
(select BulkDeleteOperationBase.asyncoperationid 
    from BulkDeleteOperationBase    
        left join asyncoperationbase on (BulkDeleteOperationBase.asyncoperationid=asyncoperationbase.asyncoperationid and    
        asyncoperationbase.deletionstatecode = 0) 
    where asyncoperationbase.asyncoperationid is null)    

delete from asyncoperationbase 
where deletionstatecode = 2 and 
completedon < @p30Days  

commit transaction T1

我最近注意到的问题是，这个工作从凌晨 4 点开始，运行了至少 4 个小时并且没有完成。当我尝试针对 1 条记录运行第一个更新语句时，SQL 进程没有完成并成为进程链中的主要阻塞器。有没有人对可能导致这种行为的原因有任何想法？我查看了活动监视器，没有其他进程导致重大阻塞。

Answer 1

检查这些语句是否相互阻塞。因为它们属于同一笔交易。他们是否以某种方式锁定冲突的行？

update AsyncOperationBase 
set deletionstatecode=2    
where deletionstatecode = 0 and 
statecode = 3 and 
completedon is not null and 
completedon < @p30Days   
and OperationType <> 10

update AsyncOperationBase 
set deletionstatecode=2    
where deletionstatecode = 0 and 
statecode = 3 and 
completedon is not null and 
completedon < @p3Years   
and OperationType = 10