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以下存儲過程由我們的代理每5分鐘運行一次 - 它使用此proc掃描表Control_EmailQueue以查看是否有任何新電子郵件發送出去。爲什麼此過程會生成兩個電子郵件？
我想測試當不正確的電子郵件信息輸入表Control_EmailQueue時，過程如何表現。下面詳細介紹兩項測試及其結果。
TEST1
我將記錄添加到Control_EmailQueue這在所有3場EmailTO/EmailCC and EmailBCCNULL條目。這工作正常，即和錯誤被捕獲並執行內部CATCH的代碼，所以我收到題爲'ERROR OCCURED DURING EMAIL CREATION'
TEST2
我將記錄添加到Control_EmailQueue的電子郵件。在字段EmailTO中輸入該字符串'[email protected]; [email protected]'，即第一個電子郵件地址有效，但第二個電子郵件地址是無效。當代理運行程序時，收到的電子郵件是[email protected]，但接着半秒鐘後收到另一個相同的電子郵件[email protected]。由於未收到標題爲'ERROR OCCURED DURING EMAIL CREATION'的電子郵件，因此CATCH代碼未在此測試中執行。
BEGIN TRY
DECLARE @Exit TINYINT = 0
WHILE @Exit = 0
BEGIN
BEGIN TRANSACTION
DECLARE @MailIdFound INT =
(
SELECT
CASE
WHEN MIN([EmailId]) IS NULL THEN 0
ELSE MIN([EmailId])
END
FROM [xxx].[console].[Control_EmailQueue]
WHERE
[DateInsertKey] IS NOT NULL
AND
(--the following gives option to re-run past mails by updating DateEmailKey to NULL
[DateEmailKey] IS NULL
OR
[DateEmailKey] < [DateInsertKey]
)
AND
ErrorOccured = 0
AND
EmailActive = 1
)
IF @MailIdFound = 0
BEGIN SET @Exit = 1 END --exit here as
ELSE
BEGIN --send the mail here
--DECLARE @EmailId INT
DECLARE @DateInsertKey INT
DECLARE @DateEmailKey INT
DECLARE @CallingReportName NVARCHAR(1000)
DECLARE @EmailBCC NVARCHAR(1000)
DECLARE @EmailTO NVARCHAR(1000)
DECLARE @EmailCC NVARCHAR(1000)
DECLARE @EmailBody NVARCHAR(MAX)
DECLARE @EmailAttachmentPath NVARCHAR(1000)
DECLARE @EmailImportance VARCHAR(6)
DECLARE @EmailSubject NVARCHAR(1000)
;WITH myMostUrgentMail_cte
AS
(
SELECT
TOP 1
--[EmailId],
[DateInsertKey],
[DateEmailKey],
[CallingReportName],
[EmailBCC],
[EmailTO],
[EmailCC],
[EmailBody],
[EmailAttachmentPath],
[EmailImportance],
[EmailSubject]
FROM [xxx].[console].[Control_EmailQueue]
WHERE [EmailId] = @MailIdFound
)
SELECT
@DateInsertKey = [DateInsertKey],
@DateEmailKey = [DateEmailKey],
@CallingReportName = [CallingReportName],
@EmailTO = [EmailTO],
@EmailCC = [EmailCC],
@EmailBCC = [EmailBCC],
@EmailBody = [EmailBody],
@EmailAttachmentPath = [EmailAttachmentPath],
@EmailImportance = CASE
WHEN [EmailImportance] = 0 THEN 'Low'
WHEN [EmailImportance] = 1 THEN 'Normal'
WHEN [EmailImportance] = 2 THEN 'High'
END,
@EmailSubject = [EmailSubject]
FROM myMostUrgentMail_cte
SET @EmailBody = @EmailBody + '<b>Please contact us with any questions</b></p></span></html>'
EXEC msdb..sp_send_dbmail
@recipients = @EmailTO,
@copy_recipients = @EmailCC,
@blind_copy_recipients = @EmailBCC,
@subject = @EmailSubject,
@file_attachments = @EmailAttachmentPath,
@Importance = @EmailImportance,
@body_format = 'html',
@body = @EmailBody
UPDATE x
SET
x.[DateEmailKey] = (CONVERT(CHAR(8),GETDATE(),(112))),
x.[DateEmailTime] = (CONVERT([time](7),left(CONVERT([char](12),GETDATE(),(114)),(8)),(0)))
FROM [xxx].[console].[Control_EmailQueue] x
WHERE x.[EmailId] = @MailIdFound
END
COMMIT TRANSACTION
END
END TRY
BEGIN CATCH
IF @@trancount>0
BEGIN
ROLLBACK TRANSACTION
END
-- handle error here
DECLARE @ErrorMessage VARCHAR(100) = '<html><p>Error occured during creation of EmailId: ' + CONVERT(VARCHAR(10),@MailIdFound) + '</p><p>xxx.console.Control_EmailQueue</p></html>'
EXEC msdb..sp_send_dbmail
@recipients = '[email protected];'
, @subject = 'ERROR OCCURED DURING EMAIL CREATION'
, @body_format = 'html'
, @body = @ErrorMessage
UPDATE x
SET x.ErrorOccured = 1
FROM [xxx].[console].[Control_EmailQueue] x
WHERE x.[EmailId] = @MailIdFound
END CATCH;
END
我發現這非常難以遵循。 '所以它有我的正確地址加上明顯不正確的地址' - 在同一列/行？這怎麼可能？ '然後我收到消息' - 哪條消息？ –
如果你擺脫了交易，問題是否消失？ – UnhandledExcepSean
@AaronBertrand - 我現在編輯操作系統 – whytheq