0

我正在运行 SQL Server 2008 R2，并且我有一个触发器，它插入到一个表中，然后 asql 代理作业每 10 秒启动一次以运行 sp 以发送电子邮件通知。我遇到的问题是，当大量插入同时发生时，通知可能会挂起并且在插入发生后几分钟（有时长达一个小时）内不会发送出去。 tb_BatchEmail 只接收一次插入几个（2-3 个），是 Orders 表可以同时进行几十个插入。所以我的问题是 - 这是设置这种类型的触发器的最佳方法，还是有更好的方法更有效并且在同时发生大量表插入时不会落后？

这是触发器：

ALTER TRIGGER [dbo].[VoceraOeOrders] ON [dbo].[Orders]
AFTER INSERT
AS
BEGIN
    SET NOCOUNT ON;

    INSERT INTO dbo.tb_BatchEmail (
        BatchEmailID
        ,[To]
        ,Body
        ,[Subject]
        ,[Profile]
        ,OrderID
        ,OrderDateTime
        ,SentDateTime
        )
    SELECT '0'
        ,'some_email'
        ,CASE 
            WHEN RoomTreatmentID IS NULL
                THEN 'No Room#'
            ELSE RoomTreatmentID
            END + '-' + OrderedProcedureName
        ,CASE 
            WHEN Category = 'US'
                THEN 'Stat Ultra Sound'
            WHEN Category = 'NUC'
                THEN 'Stat Nuclear'
            WHEN Category = 'ECHO'
                THEN 'Stat Echo'
            WHEN Category = 'CT'
                THEN 'Stat C T'
            WHEN Category = 'MRI'
                THEN 'Stat M R I'
            WHEN Category = 'XRAY'
                THEN 'Stat Xray'
            ELSE 'Stat Order Alerts'
            END
        ,'Alert'
        ,OrderID
        ,OrderDateTime
        ,NULL
    FROM inserted i
    INNER JOIN dbo.Patients pat
        ON pat.VisitID = i.VisitID
            AND pat.SourceID = i.SourceID
    WHERE Priority = 'STAT'
        AND Category IN ('CT', 'MRI', 'XRAY', 'US', 'NUC', 'ECHO')
        AND CurrentLocationID = 'ED'
END

这是设置为通过服务器代理作业每 10 秒启动一次的 sp：

ALTER PROCEDURE [dbo].[sp_SendVoceraMail]

AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

DECLARE @Id INT
DECLARE @To VARCHAR(250)
DECLARE @Body VARCHAR(250)
DECLARE @Subject VARCHAR(50)
DECLARE @ProfileName VARCHAR(20)

WHILE (
        SELECT count(*)
        FROM tb_BatchEmail
        WHERE BatchEmailID = 0
        ) > 0
BEGIN
    SELECT TOP 1 @Id = Id
        ,@To = [To]
        ,@Body = Body
        ,@Subject = [Subject]
        ,@ProfileName = [Profile]
    FROM tb_BatchEmail
    WHERE BatchEmailID = 0

    EXEC msdb.dbo.sp_send_dbmail @recipients = @To
        ,@body = @Body
        ,@subject = @Subject
        ,@profile_name = @ProfileName


    UPDATE tb_BatchEmail
    SET BatchEmailID = 1
        ,SentDateTime = GETDATE()
    WHERE Id = @Id
END

END
4

0 回答 0