IsDeterministic Property
Cette fonctionnalité sera supprimée dans une prochaine version de Microsoft SQL Server. Évitez d'utiliser cette fonctionnalité dans de nouveaux travaux de développement et prévoyez de modifier les applications qui utilisent actuellement cette fonctionnalité.
The IsDeterministic property specifies whether a user-defined function is a deterministic function.
Syntaxe
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);
Notes
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.
Notes
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.