如何解决在不锁定表的情况下读取批量记录和更新单个记录的最佳方法
Declare @maxRowId int
Set @maxRowId=0
Declare @rowIndex int
Set @rowIndex=1
Declare @recordId bigint
Set @recordId=0
Begin Try
Declare @ReservedTickets table(RowId int,Id bigint,TicketCodeId nvarchar(100),Status nvarchar(100),DateTimeReserved datetime)
insert into @ReservedTickets
select ROW_NUMBER() OVER (ORDER BY Id) RowId,Id,TicketCodeId,Status,DateTimeReserved
from [dbo].[Ticket] with(nolock)
where status='reserved' and
datetimeReserved <= DATEADD(minute,-30,getdate())
select @maxRowId=max(RowId) from @ReservedTickets
while @rowIndex<=@maxRowId
BEGIN
Select @recordId=Id from @ReservedTickets where Rowid=@rowIndex
Begin TRAN
UPDATE upd_Ticket
set
upd_Ticket.Status='available',upd_Ticket.DateTimeReserved=null,RequestReference=null
from [dbo].[Ticket] upd_Ticket
INNER JOIN [dbo].[Ticket] slct_Ticket with(nolock)
ON upd_Ticket.Id = slct_Ticket.Id
where slct_Ticket.Id= @recordId and
slct_Ticket.status='reserved' and
slct_Ticket.datetimeReserved <= DATEADD(minute,getdate())
Commit TRAN
set @rowIndex=@rowIndex+1
END
select RV.Id,RV.status 'InitialStatus',V.status 'UpdatedStatus',RV.DateTimeReserved
from @ReservedTickets RV
Left join [dbo].[Ticket] V on
RV.Id=v.Id
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