AnsiNullsStatus Property
Questa caratteristica verrà rimossa a partire da una delle prossime versioni di Microsoft SQL Server. Evitare di utilizzare questa funzionalità in un nuovo progetto di sviluppo e prevedere interventi di modifica nelle applicazioni in cui è attualmente implementata.
The AnsiNullsStatus property returns TRUE when the database object referenced depends on a table exhibiting ISO NULL handling behavior.
Sintassi
object.AnsiNullsStatus
Parts
- object
An expression that evaluates to an object in the Applies To list
Data Type
Boolean
Modifiable
Read/write when a StoredProcedure2, Trigger2, UserDefinedFunction, or View2 object is created. Read-only when a StoredProcedure, Trigger, or View object is used, or after a StoredProcedure2, Trigger2, UserDefinedFunction, or View2object is created.
Prototype (C/C++)
HRESULT GetAnsiNullsStatus(LPBOOL pRetVal);
Osservazioni
By default, Microsoft SQL Server creates columns that do not accept NULL unless the user explicitly declares the ability to accept NULL. Further, SQL Server returns TRUE when evaluating the expression NULL = NULL. These default behaviors are nonstandard.
Database and client connection options override default SQL Server behavior. If the default is overridden, tables created exhibit ISO standard NULL handling and objects that depend upon those tables function as specified by ISO.
[!NOTA]
If an application calls AnsiNullsStatuson an instance of SQL Server version 7.0 with the Table2 object, the constant, SQLDMO_E_SQL80ONLY, and the message "This property or method requires Microsoft SQL Server 2000 or later" are returned.