IsDeterministic 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 IsDeterministic property specifies whether a user-defined function is a deterministic function.
语法
object
.IsDeterministic
Parts
- object
An expression that evaluates to an object in the Applies To list
Data Type
Boolean
Modifiable
Read-only
Prototype (C/C++)
HRESULT GetIsDeterministic(LPBOOL pRetVal);
注释
A computed column can be used as a key column in an index or as part of any PRIMARY KEY or UNIQUE constraint, if the computed column value is defined by a deterministic expression and the data type of the result is allowed in indexed columns.
An application can use the IsDeterministic property to determine whether a computed column that depends on a user-defined function can be used in an index.
IsDeterministic returns TRUE if a user-defined function is deterministic.
.gif "注意") 注意 |
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If an application calls IsDeterministic on an instance of Microsoft SQL Server version 7.0, the constant, SQLDMO_E_SQL80ONLY, and the message "This property or method requires Microsoft SQL Server 2000 or later" are returned. |