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Metodo PrefetchObjects (Type)

Esegue la prelettura di oggetti di database di un tipo specificato.

Spazio dei nomi  Microsoft.SqlServer.Management.Smo
Assembly:  Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)

Sintassi

'Dichiarazione
Public Sub PrefetchObjects ( _
    objectType As Type _
)
'Utilizzo
Dim instance As Database
Dim objectType As Type

instance.PrefetchObjects(objectType)

public void PrefetchObjects(
    Type objectType
)

public:
void PrefetchObjects(
    Type^ objectType
)

member PrefetchObjects : 
        objectType:Type -> unit 

public function PrefetchObjects(
    objectType : Type
)

Parametri

  • objectType
    Tipo: System. . :: . .Type
    Oggetto Type che limita il tipo di oggetto su cui deve essere eseguita la prelettura.

Osservazioni

This enables collections to be fully populated with objects by making one network trip to the instance of SQL Server. Prefetching is an optimization used when the whole collection of objects is required.

This method uses the default initialization of fields for prefetching database objects.

Esempi

VB

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server

'Reference the AdventureWorks2008R2 database.
Dim db As Database
db = srv.Databases("AdventureWorks2008R2")

'Assign the Table object type to a System.Type object variable.
Dim tb As Table
Dim typ As Type
tb = New Table
typ = tb.GetType

'Set scripting options.
Dim so As ScriptingOptions
so = New ScriptingOptions
so.AllowSystemObjects = True

'Prefetch all Table type objects, including system objects.
db.PrefetchObjects(typ, so)

PowerShell

$srv = new-Object Microsoft.SqlServer.Management.Smo.Server("(local)")
$db = New-Object Microsoft.SqlServer.Management.Smo.Database
$db = $srv.Databases.Item("AdventureWorks2008R2")

$tb = New-Object Microsoft.SqlServer.Management.Smo.Table
$typ = $tb.GetType()

$so = New-Object Microsoft.SqlServer.Management.Smo.ScriptingOptions
$so.AllowSystemObjects = $TRUE

$db.PrefetchObjects($typ, $so)

Write-Host $db.GetTransactionCount()