Question

我的生产系统存在一个奇怪的问题。我有readCommitted事务定义了带有no_lock的读操作和带有表锁的写操作在同一范围内。

但是，多个进程能够覆盖锁定并能够执行写入操作，具有很大的影响。请帮忙！。感谢。

using (TransactionScope transaction = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions() { IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted }))
{
    dataAccess.ExecNonQuery("GetNextOrder", parametersList); //read orders from table 1, there is NO_lock in the SP

    orderIDParameter = (IParameter)parametersList[0];
    int orderIDParameterValue = (int) orderIDParameter.Value;

    if (orderIDParameterValue != NullOrderID)
    {
       parametersList.Clear();
       IParameter orderIDLockParameter = SQLClientFactory.GetParameter("@OrderID", orderIDParameterValue, Direction.In);
       IParameter lockNameParameter = SQLClientFactory.GetParameter("@LockName", lockName, Direction.In);
       parametersList.Add(orderIDLockParameter);
       parametersList.Add(lockNameParameter);

       dataAccess.ExecNonQuery("Insert_SP", parametersList);  //Insert into table 2

       orderID = orderIDParameterValue;
    }

    transaction.Complete();
}

存储过程：GetNextOrder

SELECT top 1 @OrderID=ht.OrderID        
     FROM dbo.table1 ht WITH(nolock)       
     left join dbo.table2 htl WITH(nolock) on ht.orderid = htl.orderid        
     WHERE ht.Status in (0,1)

存储过程：Insert_SP

CREATE procedure [dbo].[Insert_SP] (
@OrderID INT,
@LockName VARCHAR(50)
   )
AS
BEGIN
SET NOCOUNT ON

 insert into table2 (OrderID, LockName) VALUES (@OrderID, @LockName) 

SET NOCOUNT OFF
END

Answer 1

您的dataAccess类是如何定义的？

我怀疑它没有参与新交易 - 使用

connection.EnlistTransaction(Transaction.Current)

在那个班里。

读取已提交，无锁定。搞砸了

1 个答案: