Metodo SqlGeography.Filter
Offers a fast, index-only intersection method to determine if a geography instance intersects another SqlGeography instance, assuming an index is available.
Spazio dei nomi Microsoft.SqlServer.Types
Assembly: Microsoft.SqlServer.Types (in Microsoft.SqlServer.Types.dll)
Sintassi
'Dichiarazione
<SqlMethodAttribute(IsDeterministic := True, IsPrecise := False)> _
Public Function Filter ( _
other As SqlGeography _
) As SqlBoolean
'Utilizzo
Dim instance As SqlGeography
Dim other As SqlGeography
Dim returnValue As SqlBoolean
returnValue = instance.Filter(other)
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public SqlBoolean Filter(
SqlGeography other
)
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public:
SqlBoolean Filter(
SqlGeography^ other
)
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
member Filter :
other:SqlGeography -> SqlBoolean
public function Filter(
other : SqlGeography
) : SqlBoolean
Parametri
- other
Tipo: Microsoft.SqlServer.Types.SqlGeography
Is another geography instance to compare against the instance on which Filter is invoked.
Valore restituito
Tipo: System.Data.SqlTypes.SqlBoolean
A SqlBoolean value that specifies whether the specified SqlGeography instance intersects the current SqlGeography.Returns 1 if a geography instance potentially intersects another SqlGeography instance. This method may produce a false-positive return, and the exact result may be plan-dependent. Returns an accurate 0 value (true negative return) if there is no intersection of SqlGeography instances found.
Osservazioni
In cases where an index is not available, or is not used, the method will return the same values as STIntersects when called with the same parameters.
This method is not deterministic and is not precise.