已被執行我在交易中的桌面應用程序的提交收到此錯誤:事務錯誤提交()時,選擇內幕交易
這OleDbTransaction已完成;它不再可用。
我發現有類似的錯誤的其他職位表明,如果它需要很長時間或包含大量的數據,可能會發生這種情況。這裏不是這種情況。日誌記錄告訴我,從開始到提交需要140毫秒,並且在事務內部執行大約10條命令。
它使用的是Oracle數據庫。
這個類是我的數據庫類的簡化版本:
Class MyDatabase
Private mConnection AS OleDbConnection
Private mTransaction AS OleDbTransaction
Function Value(ByVal piSql As String) As Integer
Try
Dim lCommand As OleDbCommand
lCommand = New OleDbCommand(piSql, mConnection)
If mTransaction IsNot Nothing Then
lCommand.Transaction = mTransaction
End If
Dim lValue = lCommand.ExecuteScalar()
If Not lValue Is Nothing Then
WriteLog(lValue.ToString(), 3, "Value Returned")
Return lValue.ToString()
Else
WriteLog("<null>", 3, "Value Returned (null)")
Return ""
End If
Catch ex As Exception
WriteLog(ex.Message)
End Try
End Function
Function ExecuteSql(ByVal piSql As String) As Integer
Try
Dim lCommand As OleDbCommand
lCommand = New OleDbCommand(piSql, mConnection)
If mTransaction IsNot Nothing Then
lCommand.Transaction = mTransaction
End If
Return lCommand.ExecuteNonQuery()
Catch ex As Exception
WriteLog(ex.Message)
End Try
End Function
Public Sub BeginTransaction()
Try
mTransaction = mConnection.BeginTransaction()
Catch ex As Exception
WriteLog(ex.Message)
End Try
End Sub
Public Sub Commit()
If Not mTransaction Is Nothing Then
Try
mTransaction.Commit()
Catch ex As Exception
WriteLog(ex.Message)
End Try
mTransaction.Dispose()
mTransaction = Nothing
End If
End Sub
Public Sub Rollback()
If Not mTransaction Is Nothing Then
Try
mTransaction.Rollback()
Catch ex As Exception
WriteLog(ex.Message)
End Try
mTransaction.Dispose()
mTransaction = Nothing
End If
End Sub
End Class
調用代碼(簡化):
mDatabase.BeginTransaction()
mOrderId = mDatabase.Value("select max(order_id) from ler_order")
mDatabase.ExecuteSql("insert into ler_order (order_id,status,message,plotter,reference,paper_size,orientation,plot_scale,format,usr,email,no_of_copies,date_time,uservar1,uservar2,uservar3,ell,nll,eur,nur,coord_type,graveforespoergselanmodningid,graveforespoergselnr,oprettetdato,aendretdato,graveartnavn,andengraveart,lek_virksomhed,lek_navn,lek_adresse,lek_postnr,lek_postdistrikt,lek_land,lek_telefon,lek_mobiltelefon,lek_telefax,lek_email,ga_navn,ga_adresse,ga_postnr,ga_postdistrikt,ga_land,ga_telefon,ga_mobiltelefon,ga_telefax,ga_email,gak_id,gak_virksomhed,gak_navn,gak_adresse,gak_postnr,gak_postdistrikt,gak_land,gak_telefon,gak_mobiltelefon,gak_telefax,gak_email,emailafsendt,konverteringsstatus) values (101633,0,null,'LER','10d6d8bc-b9b2-44bb-84bf-ceca42a0970a',null,0,0,null,null,null,0,'09-05-2011 13:25:33',null,null,'VAND',-259954.967,145092.123,-259802.657,145147.225,1,'10d6d8bc-b9b2-44bb-84bf-ceca42a0970a',425950,'09-05-2011 13:20:27','09-05-2011 13:20:58','Gravemaskine',null,null,'Ledningsoplysning','Kokbjerg',null,'Kolding',null,'59 23 44 55',null,null,'[email protected]','FORSYNINGSLEDNINGER','vej 12','1700','Nyberg','NO','21491697',null,null,'[email protected]','051055f4-ea2a-4cb3-a016-6f6477e6a342','MUNCK FORSYNINGSLEDNINGER A/S','Jon Andersen','vej 38 B','7100','Vejle','NO',null,'23681515','76409220','[email protected]','09-05-2011 13:20:58','OK')")
mDatabase.ExecuteSql("delete from ler_order_coord where order_id = 101633")
mDatabase.ExecuteSql("insert into ler_order_coord (order_id,polygon_no,seq_no,east,north) values (101633,1,1,-259954.967,145120.599)")
mDatabase.ExecuteSql("insert into ler_order_coord (order_id,polygon_no,seq_no,east,north) values (101633,1,2,-259951.933,145092.123)")
mDatabase.ExecuteSql("insert into ler_order_coord (order_id,polygon_no,seq_no,east,north) values (101633,1,3,-259802.657,145111.956)")
mDatabase.Commit() 'This is where the error occurs
編輯: 因爲我是如何解決這個見my answer。
我對此有一個後續問題:是否不允許在這樣的事務內部運行select?或者可以通過在特定的隔離級別運行事務來完成(我發現BeginTransaction
方法有一個可選的參數來做到這一點)?或者其他一些溶劑..?就我而言,在事務啓動之前移動select來運行並不是問題,但是如果您需要運行必須在事務內部運行的select,那該怎麼辦?
對'BeginTransaction'的調用是否實際啓動了事務?代碼將異常記錄到日誌中,並且在該情況下不會引發錯誤。因此,代碼將繼續並在調用'Commit'時失敗。嘗試通過代碼來查看是否調用了'BeginTransaction'失敗。 – shahkalpesh 2011-05-10 07:16:28
@shahkalpesh:日誌文件沒有報告任何錯誤。第一個錯誤是提交。如果它沒有真正開始事務,我會認爲'mConnection.BeginTransaction()'會返回'Nothing'而不是'OleDbTransaction'對象,對吧? – awe 2011-05-10 07:24:00
@awe:你說得對。是否有任何'ExecuteSQL'語句失敗,這可能導致事務自行回滾? – shahkalpesh 2011-05-10 07:51:26