ms-access - 使用 Vbscript 将记录批量插入 Access

Question

我真的用这个把头发拉出来了。我有一个 vbscript，我正在尝试将几十万条记录插入到 Access 数据库中。

显然，如果我一次做一个真的很慢，所以我想我可以用某种事务批量插入它们。所以我试着写这个:

set rs = CreateObject("ADODB.recordset")
 rs.Open "table", objConn,, 4

For counter = 1 to 100000
  rs.AddNew
  rs("username") = "Value"
Next

  rs.UpdateBatch

(objConn 是数据库连接)。

问题是我收到一条错误消息:

"Number of rows with pending changes exceeded the limit"

当有多个待处理的更改时，我就会明白这一点。

我想我没有正确设置我的交易，但我有点卡住了。不要以为有人可以指出我方法的错误吗？非常感谢。

Answer 1

为了支持我在交易中使用命令的提议，我写道
这个脚本:

  Dim sAct      : sAct      = "trout"
  If goWAN.Exists( "a" ) Then sAct = goWAN( "a" )
  Dim nRecs     : nRecs     = 10
  If goWAN.Exists( "n" ) Then nRecs = CLng( goWAN( "n" ) )
  Dim sMFSpec   : sMFSpec   = goFS.GetAbsolutePathName( "..\data\ut.mdb" )
  Dim oConn     : Set oConn = CreateObject( "ADODB.Connection" )
  Dim oRs       : Set oRs   = CreateObject( "ADODB.Recordset" )

  Dim nRec, oCmd, nRA, aData, oParm

  oConn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & sMFSpec
  Set oRs.ActiveConnection = oConn

  oConn.Execute( "DELETE FROM tLines" )
  WScript.Echo "#Recs:", oConn.Execute( "SELECT COUNT(SampleText) FROM tLines" ).Fields( 0 )

  WScript.Echo sAct
  Select Case sAct
    Case "trout"
    Case "bob"
      oRs.CursorLocation = adUseClient
      oRs.CursorType = adOpenKeySet
      oRs.LockType = adLockBatchOptimistic    
    Case "eh"  
  End Select
  WScript.Echo "oRs.CursorLocation: ", oRs.CursorLocation
  WScript.Echo "oRs.CursorType: ", oRs.CursorType
  WScript.Echo "oRs.LockType: ", oRs.LockType
  Select Case sAct
    Case "trout", "bob"
      oRs.Open "tLines", oConn, , adLockBatchOptimistic
      For nRec = 1 to nRecs
          oRs.AddNew
          oRs( "SampleText" ) = "This is line " & nRec
      Next
      oRs.UpdateBatch
      oRs.Close
    Case "eh" 
      oConn.BeginTrans
      Set oParm = CreateObject( "ADODB.Parameter" )
      With oParm
        .Name      = "A"
        .Type      = adVarChar
        .Value     = ""
        .Direction = adParamInput
        .Size      = 100
      End With
      Set oCmd = CreateObject( "ADODB.Command" )
      With oCmd
        Set .ActiveConnection = oConn
            .CommandText      = "INSERT INTO tLines (SampleText) VALUES (?)"
            .CommandType      = adCmdText
            .Parameters.Append oParm
      End With

      ReDim aData( 0 )
      For nRec = 1 to nRecs
          aData( 0 ) = "This is line " & nRec
          oCmd.Execute nRA, aData, adExecuteNoRecords + adCmdText
      Next
      oConn.CommitTrans 
  End Select

  WScript.Echo "#Recs:", oConn.Execute( "SELECT COUNT(SampleText) FROM tLines" ).Fields( 0 )
  WScript.Echo "First:", oConn.Execute( "SELECT TOP 1 * FROM tLines" ).Fields( 0 )

  oConn.Close

用/n:200 和/a:trout 调用它显示:

  #Recs: 0
  trout
  oRs.CursorLocation:  2
  oRs.CursorType:  0
  oRs.LockType:  1
  ... xpl.vbs(246, 11) Provider: Number of rows with pending changes exceeded the limit.

所以我想，我正确地重现了你的问题。对于/a:bob:

  #Recs: 0
  bob
  oRs.CursorLocation:  3
  oRs.CursorType:  1
  oRs.LockType:  4
  #Recs: 200
  First: This is line 1
  xpl.vbs: Erfolgreich beendet. (0) [ 19.74219 secs ]

所以设置

  oRs.CursorLocation = adUseClient
  oRs.CursorType = adOpenKeySet
  oRs.LockType = adLockBatchOptimistic    

正如鲍勃(和微软)所建议的那样，这是解决您问题的一种方法。为了加快速度，我放了一个
命令进入交易:

  oConn.BeginTrans
  Set oCmd = CreateObject( "ADODB.Command" )
  ...
  ReDim aData( 0 )
  For nRec = 1 to nRecs
      aData( 0 ) = "This is line " & nRec
      oCmd.Execute nRA, aData, adExecuteNoRecords + adCmdText
  Next
  oConn.CommitTrans 

结果:

#Recs: 0
eh
oRs.CursorLocation:  2
oRs.CursorType:  0
oRs.LockType:  1
#Recs: 200
First: This is line 1
xpl.vbs: Erfolgreich beendet. (0) [ 1.47656 secs ]

从 20 秒到 2 秒(没有任何属性摆弄)对我来说似乎不错。