Rule Property
В будущей версии Microsoft SQL Server эта возможность будет удалена. Избегайте использования этой возможности в новых разработках и запланируйте изменение существующих приложений, в которых она применяется.
The Ruleproperty identifies a data integrity constraint, implemented by a Microsoft SQL Server database rule and bound to the referenced column or user-defined data type.
Синтаксис
object.Rule [= value]
Parts
object
An expression that evaluates to an object in the Applies To listvalue
A string that identifies a SQL Server rule by name
Data Type
String
Modifiable
Read/write for the Column object. Read-only for the UserDefinedDatatype object.
Prototype (C/C++)
HRESULT GetRule(SQLDMO_LPBSTR pRetVal);
HRESULT SetRule(SQLDMO_LPCSTR NewValue);
.gif "Примечание") Примечание |
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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 using SysFreeString. |
Замечания
Setting the Rule property offers an alternate method for binding SQL Server rules to columns.