Rule Property (SQL-DMO)

The Rule property identifies a data integrity constraint, implemented by a Microsoft® SQL Server™ database rule and bound to the referenced column or user-defined data type.

Applies To

Column Object

UserDefinedDatatype Object

Syntax

object.Rule [= value]

Part	Description
object	Expression that evaluates to an object in the Applies To list
value	String identifying a SQL Server rule by name

Remarks

Setting the Rule property offers an alternate method for binding SQL Server rules to columns.

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);

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.