为存储过程实现队列

Question

我在SQL Server中有一个基本的SELECT存储过程，它连接到MS Access前端。当多个用户尝试运行相同的存储过程时（例如ODBC-调用失败或表当前被锁定），用户将收到表锁定。有没有办法实现队列或防止这种情况发生。

我尝试将服务器移近一些，以查看是否是延迟问题，并尝试使用OPTION（MAXDOP 1）以防出现处理器问题。

(@username as varchar(20),
@searchcriteria as varchar(50)
)

AS

SET NOCOUNT ON; 
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;

--SET @username = 'caddo';
--SET @searchcriteria = 9;
--SET @portfolio = 'WH – Apollo';
--PRINT '%'+ RIGHT(CAST(@situsloanid as varchar(10)),@loanLength) + '%'

SELECT tblPortfolio.PortfolioID, 
tblAssets.AssetID, 
tblAssets.ModelEntity, 
tblPortfolio.Portfolio, 
tblAssets.SitusLoanID, 
tblEmployees.Last AS AMIntials, 
tblEmployees_1.Last AS TeamLead, 
tblStatus.StatusType, tblEmployees.NetworkUserName, tblRegion.ID, tblRegion.Region, 
IIf(1=1 Or 0=1,1,IIf(@username=[tblEmployees].[NetworkUserName] Or @username=[tblEmployees_1].[NetworkUserName] Or @username=[tblEmployees_2].[NetworkUserName] Or @username=[tblEmployees_3].[NetworkUserName] Or @username=[tblEmployees_4].[NetworkUserName] Or @username=[tblEmployees_5].[NetworkUserName],1,0)) AS [Select], 
tblEmployees_1.NetworkUserName, tblEmployees_2.Last AS PMLead, tblEmployees_3.Last AS Analyst, tblEmployees_4.Last AS Admin, tblEmployees_5.Last AS ComplianceLead, tblAssets.AssetName, 
tblAssets.BorrowerName, tblEmployees.compliance AS ComplianceBool, tblAssets.SitusLoanID, tblAssets.Alias 

FROM tblAssets LEFT JOIN tblEmployees AS tblEmployees_5 ON tblAssets.ComplianceID = tblEmployees_5.LoginID 
LEFT JOIN tblEmployees AS tblEmployees_3 ON tblAssets.AnalystID = tblEmployees_3.LoginID 
LEFT JOIN tblEmployees AS tblEmployees_2 ON tblAssets.PMLeaderID = tblEmployees_2.LoginID 
LEFT JOIN tblEmployees AS tblEmployees_1 ON tblAssets.AMLeaderID = tblEmployees_1.LoginID 
LEFT JOIN tblEmployees ON tblAssets.AssetMngrID = tblEmployees.LoginID 
LEFT JOIN tblStatus ON  tblAssets.PipelineStatusID = tblStatus.StatusID 
LEFT JOIN tblEmployees AS tblEmployees_4 ON tblAssets.ServicerContactID = tblEmployees_4.LoginID 
LEFT JOIN tblPortfolio ON tblAssets.PortfolioID = tblPortfolio.PortfolioID 
LEFT JOIN tblRegion ON tblAssets.RegionId = tblRegion.ID 

WHERE (1=1 )
AND (tblPortfolio.Portfolio Like '%'+ @searchcriteria + '%' 
OR tblAssets.SitusLoanID Like '%'+ @searchcriteria + '%' 
OR tblAssets.BorrowerName Like '%'+ @searchcriteria + '%' 
OR tblEmployees_2.Last Like '%'+ @searchcriteria + '%' 
OR tblAssets.AssetName Like '%'+ @searchcriteria + '%'
OR tblAssets.Alias Like '%'+ @searchcriteria + '%'

AND (IIf(1=1 Or 0=1,1,IIf(@username=[tblEmployees].[NetworkUserName] 
Or @username=[tblEmployees_1].[NetworkUserName] 
Or @username=[tblEmployees_2].[NetworkUserName] 
Or @username=[tblEmployees_3].[NetworkUserName] 
Or @username=[tblEmployees_4].[NetworkUserName] 
Or @username=[tblEmployees_5].[NetworkUserName],1,0)))=1)

ORDER BY tblAssets.AssetName, tblAssets.SitusLoanID

OPTION (MAXDOP 1); 

我希望用户能够运行SP并接收到锁错误，或者希望他们被放置在队列中以接收期望的数据。