BaseType Property

后续版本的 Microsoft SQL Server 将删除该功能。请避免在新的开发工作中使用该功能，并着手修改当前还在使用该功能的应用程序。

The BaseType property exposes the system data type from which a user-defined data type has been derived.

语法

object
.BaseType [= value]

Parts

• object
  An expression that evaluates to an object in the Applies To list

• value
  A text string that identifies a Microsoft SQL Server system data type

Data Type

String

Modifiable

Read/write

Prototype (C/C++)

HRESULT GetBaseType(SQLDMO_LPBSTR pRetVal);
HRESULT SetBaseType(SQLDMO_LPCSTR NewValue);

注意：
SQL Distributed Management Objects (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.

备注

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.

Applies To: