回滚MS Access中的多个SQL更新查询

I have multiple SQL stored procedures (e.g. UPDATE, SELECT INTO statements) executed in VBA in MS Access:

我在MS Access中的VBA中执行了多个SQL存储过程（例如UPDATE，SELECT INTO语句）：

CurrentDb.Execute "qry1"
CurrentDb.Execute "qry2"

CurrentDb.Execute“qry1”CurrentDb.Execute“qry2”

I want it so that:
* if qry2 fails, it will undo qry1.
* qry1 and qry2 are executed at the same time, (as I have many of these stored procedures executed in a chain), so the procedure runs faster.

我希望如此：*如果qry2失败，它将撤消qry1。 * qry1和qry2同时执行，（因为我在链中执行了许多这些存储过程），因此程序运行得更快。

How can this be done?

如何才能做到这一点？

1 个解决方案

#1

Transactions may suit, they allow rollback: http://msdn.microsoft.com/en-us/library/bb243155.aspx

事务可能适合，它们允许回滚：http：//msdn.microsoft.com/en-us/library/bb243155.aspx

EDIT

编辑

Here is a rough example in DAO:

这是DAO中的一个粗略示例：

Dim strSQL As String
Dim db As DAO.Database
Dim wrk As Workspace

On Error GoTo TrapError

    Set db = CurrentDb
    Set wrk = DBEngine.Workspaces(0)

    wrk.BeginTrans
        strSQL = "Update sysInfo Set InvoiceOR=False"
        db.Execute strSQL, dbFailOnError
    wrk.CommitTrans

Exit_Sub:
    Set db = Nothing
    Set wrk = Nothing
    Exit Sub

TrapError:

    MsgBox "Failed: " & Err.Description
    wrk.Rollback
    Err.Clear
    Resume Exit_Sub

Here are some rough notes for ADO:

以下是ADO的一些粗略说明：

Dim cmd As ADODB.Command
Dim cn As ADODB.Connection

Set cmd = CreateObject("ADODB.Command")
Set cn = CurrentProject.Connection

cmd.CommandText = "Update sysInfo Set InvoiceOR=False"
cmd.ActiveConnection = cn
cmd.ActiveConnection.BeginTrans
cmd.Execute , , adExecuteNoRecords

If Err <> 0 Then
    cmd.ActiveConnection.RollbackTrans
Else
    cmd.ActiveConnection.CommitTrans
End If

#1