EnumReferencingKeys Method
Questa funzionalità verrà rimossa in 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 EnumReferencingKeys method returns a QueryResults object that enumerates the FOREIGN KEY constraints depending on a candidate key defined on the referenced table.
Sintassi
object
.EnumReferencingKeys( [ ReferencingTable ] , [ IncludeAll ] )as QueryResults
Parts
- object
Expression that evaluates to an object in the Applies To list.
- ReferencingTable
Optional. String that names an existing Microsoft SQL Server table. Restricts result set membership to list only FOREIGN KEY constraints defined on the specified table.
- IncludeAll
TRUE or FALSE.
Prototype (C/C++)
HRESULT EnumReferencingKeys(
LPSQLDMOQUERYRESULTS* ppResults,
SQLDMO_LPCSTR ReferencingTableName = NULL,
BOOL IncludeAllCandidates = NULL);
Returns
A QueryResults object that contains one result set defined by these columns.
| Column | Data type | Description |
|---|---|---|
candidate_key |
nvarchar(129) |
Name of the FOREIGN KEY constraint depending on a candidate key in the referenced table. |
candidate_table |
nvarchar(262) |
Name of a table on which a FOREIGN KEY constraint is defined. |
referenced |
bit |
When 1, the FOREIGN KEY constraint listed in the result set depends on the table referenced by the Table object used. |
Osservazioni
When IncludeAll is TRUE, the result set enumerates all user-defined tables in the database. The candidate_key column is NULL for those tables on which a FOREIGN KEY constraint is not defined. The value of the referenced column in the result set determines FOREIGN KEY constraint dependency.
When IncludeAll is FALSE (default), the result set enumerates only those FOREIGN KEY constraints depending on the referenced table.