VistaDB 5






UniqueId Property
Unique identifier for column that doesn't depend on name or other attributes. (Primarily for internal use. Only comparison for equality is meaningful. See remarks in documentation.)
Syntax
'Declaration
 
ReadOnly Property UniqueId As System.Integer
'Usage
 
Dim instance As IVistaDBColumnAttributes
Dim value As System.Integer
 
value = instance.UniqueId
System.int UniqueId {get;}
read-only property UniqueId: System.Integer; 
function get UniqueId : System.int
__property System.int get_UniqueId();
property System.int UniqueId {
   System.int get();
}
Remarks
This is used by DDA in AlterTable functionality to identify changes made to a column which might have also been renamed. This Id is internal to the engine and in most cases should not need to be used in user code except to compare two columns and see if they are the same (if their UniqueId values are equal they are the same column). Testing for anything other than equality does not convey any meaning; the values do not signify versioning.
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also