Creates a duplicate
Recordset object that refers to the original
Recordset object.
Syntax
expression .Clone
expression A variable that represents a Recordset object.
Return value
Recordset
Remarks
Use the Clone method to create multiple, duplicate Recordset objects. Each Recordset can have its own current record. Using Clone by itself doesn't change the data in the objects or in their underlying structures. When you use the Clone method, you can share bookmarks between two or more Recordset objects because their bookmarks are interchangeable.
You can use the
Clone method when you want to perform an operation on a
Recordset that requires multiple current records. This is faster and more efficient than opening a second
Recordset. When you create a
Recordset with the
Clone method, it initially lacks a current record. To make a record current before you use the
Recordset clone, you must set the
Bookmark property or use one of the
Move methods, one of the
Find methods, or the
Seek method.
Using the
Close method on either the original or duplicate object doesn't affect the other object. For example, using
Close on the original
Recordset doesn't close the clone.
Note
- Closing a clone recordset within a pending transaction will cause an implicit Rollback operation.
- When you clone a table-type Recordset object in a Microsoft Access workspace, the Index property setting is not cloned on the new copy of the recordset. You must copy the Index property setting manually.
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Example
This example uses the Clone method to create copies of a Recordset and then lets the user position the record pointer of each copy independently.
Sub CloneX()
Dim dbsNorthwind As Database
Dim arstProducts(1 To 3) As Recordset
Dim intLoop As Integer
Dim strMessage As String
Dim strFind As String
Set dbsNorthwind = OpenDatabase("Northwind.mdb")
' If the following SQL statement will be used often,
' creating a permanent QueryDef will result in better
' performance.
Set arstProducts(1) = dbsNorthwind.OpenRecordset( _
"SELECT ProductName FROM Products " & _
"ORDER BY ProductName", dbOpenSnapshot)
' Create two clones of the original Recordset.
Set arstProducts(2) = arstProducts(1).Clone
Set arstProducts(3) = arstProducts(1).Clone
Do While True
' Loop through the array so that on each pass, the
' user is searching a different copy of the same
' Recordset.
For intLoop = 1 To 3
' Ask for search string while showing where the
' current record pointer is for each Recordset.
strMessage = _
"Recordsets from Products table:" & vbCr & _
" 1 - Original - Record pointer at " & _
arstProducts(1)!ProductName & vbCr & _
" 2 - Clone - Record pointer at " & _
arstProducts(2)!ProductName & vbCr & _
" 3 - Clone - Record pointer at " & _
arstProducts(3)!ProductName & vbCr & _
"Enter search string for #" & intLoop & ":"
strFind = Trim(InputBox(strMessage))
If strFind = "" Then Exit Do
' Find the search string; if there's no match, jump
' to the last record.
With arstProducts(intLoop)
.FindFirst "ProductName >= '" & strFind & "'"
If .NoMatch Then .MoveLast
End With
Next intLoop
Loop
arstProducts(1).Close
arstProducts(2).Close
arstProducts(3).Close
dbsNorthwind.Close
End Sub