Clone Method (ADO)
Creates a duplicate Recordset object from an existing Recordset object. Optionally, specifies that the clone be read-only.
Syntax
Set rstDuplicate = rstOriginal.Clone (LockType)
Return Value
Returns a Recordset object reference.
Parameters
rstDuplicate
An object variable that identifies the duplicate Recordset object to be created.
rstOriginal
An object variable that identifies the Recordset object to be duplicated.
LockType
Optional. A LockTypeEnum value that specifies either the lock type of the original Recordset, or a read-only Recordset. Valid values are adLockUnspecified or adLockReadOnly.
Remarks
Use the Clone method to create multiple, duplicate Recordset objects, especially if you want to maintain more than one current record in a given set of records. Using the Clone method is more efficient than creating and opening a new Recordset object that uses the same definition as the original.
The Filter property of the original Recordset, if any, will not be applied to the clone. Set the Filter property of the new Recordset to filter the results. The simplest way to copy any existing Filter value is to assign it directly, as follows.
rsNew.Filter = rsOriginal.Filter
The current record of a newly created clone is set to the first record.
Changes you make to one Recordset object are visible in all of its clones regardless of cursor type. However, after you execute Requery on the original Recordset, the clones will no longer be synchronized to the original.
Closing the original Recordset does not close its copies, nor does closing a copy close the original or any of the other copies.
You can only clone a Recordset object that supports bookmarks. Bookmark values are interchangeable; that is, a bookmark reference from one Recordset object refers to the same record in any of its clones.
Some Recordset events that are triggered will also occur in all Recordset clones. However, because the current record can differ between cloned Recordsets, the events may not be valid for the clone. For example, if you change a value of a field, a WillChangeField event will occur in the changed Recordset and in all clones. The Fields parameter of the WillChangeField event of a cloned Recordset (where the change was not made) will refer to the fields of the current record of the clone, which may be a different record than the current record of the original Recordset where the change occurred.
The following table provides a full listing of all Recordset events. It indicates whether they are valid and triggered for any recordset clones generated by using the Clone method.
| Event | Triggered in clones? |
|---|---|
| EndOfRecordset | No |
| FetchComplete | No |
| FetchProgress | No |
| FieldChangeComplete | Yes |
| MoveComplete | No |
| RecordChangeComplete | Yes |
| RecordsetChangeComplete | No |
| WillChangeField | Yes |
| WillChangeRecord | Yes |
| WillChangeRecordset | No |
| WillMove | No |
Applies To
See Also
Clone Method Example (VB)
Clone Method Example (VBScript)
Clone Method Example (VC++)