The BaseType property exposes the system data type from which a user-defined data type has been derived.
object.BaseType [= value]
object
Expression that evaluates to an object in the Applies To list
value
Text string that identifies a Microsoft® SQL Server™ system data type
String
Read/write
HRESULT GetBaseType(SQLDMO_LPBSTR pRetVal);
HRESULT SetBaseType(SQLDMO_LPCSTR NewValue);
Note SQL-DMO strings are always returned as OLE BSTR objects. A C/C++ application obtains a reference to the string. The application must release the reference by using SysFreeString.
The BaseType property is only modifiable before the UserDefinedDatatype object has been added to the UserDefinedDatatypes collection of a Database object. After the object is added to the collection and the user-defined data type is created on an instance of SQL Server, the property is read-only.