編輯

Share via

Optimize dynamic property (ADO)

  • 發行項

Applies to: Access 2013, Office 2013

Specifies whether an index should be created on a field.

Settings and return values

Sets or returns a Boolean value that indicates whether an index should be created.

Remarks

An index can improve the performance of operations that find or sort values in a Recordset. The index is internal to ADO — you cannot explicitly access or use it in your application.

To create an index on a field, set the Optimize property to True. To delete the index, set this property to False.

Optimize is a dynamic property appended to the Field object Properties collection when the CursorLocation property is set to adUseClient.

Usage

    Dim rs As New Recordset
    Dim fld As Field
    rs.CursorLocation = adUseClient      'Enable index creation
    rs.Fields.Append "Field1", adChar, 35, adFldIsNullable
    rs.Open
    Set fld = rs.Fields(0)
    fld.Properties("Optimize") = True    'Create an index
    fld.Properties("Optimize") = False   'Delete an index