Метод Statistic.Update (StatisticsScanType, Int32, Boolean)

Статья
04/26/2013

Updates information about the distribution of key values.

Пространство имен: Microsoft.SqlServer.Management.Smo
Сборка: Microsoft.SqlServer.Smo (в Microsoft.SqlServer.Smo.dll)

Синтаксис

'Декларация
Public Sub Update ( _
    scanType As StatisticsScanType, _
    sampleValue As Integer, _
    recompute As Boolean _
)
'Применение
Dim instance As Statistic 
Dim scanType As StatisticsScanType 
Dim sampleValue As Integer 
Dim recompute As Boolean

instance.Update(scanType, sampleValue, _
    recompute)

public void Update(
    StatisticsScanType scanType,
    int sampleValue,
    bool recompute
)

public:
void Update(
    StatisticsScanType scanType, 
    int sampleValue, 
    bool recompute
)

member Update : 
        scanType:StatisticsScanType * 
        sampleValue:int * 
        recompute:bool -> unit

public function Update(
    scanType : StatisticsScanType, 
    sampleValue : int, 
    recompute : boolean
)

Параметры

scanType
Тип: Microsoft.SqlServer.Management.Smo.StatisticsScanType
StatisticsScanType

sampleValue
Тип: System.Int32
Int32 - Specifies the percentage of the table or indexed view, or the number of rows to sample when collecting statistics for larger tables or views.

recompute
Тип: System.Boolean
Boolean - Specifies if statistics that are out of date are automatically recomputed

Замечания

StatisticsScanType are listed in the following table.

Member	Description
Default	Value = 5. Specifies that a percentage of the table or indexed view is used when collecting statistics. The actual percentage is calculated by the SQL Server engine automatically.
FullScan	Value = 3. Specifies that all rows in the table or view are read when gathering statistics. This option must be used if a view is specified and it references more than one table.
Percent	Value = 1. Specifies that a percentage of the table or indexed view is used when collecting statistics. This options cannot be used if a view is specified and it references more than one table. When specified, use the sampleValue argument to indicate number of rows.
Resample	Value = 4. Specifies that the percentage ratio of the table or indexed view used when collecting statistics is inherited from existing the statistics
Rows	Value = 2. Specifies that a number of rows in the table or indexed view are used when collecting statistics. This option cannot be used if a view is specified and it references more than one table. When specified, use the sampleValue argument to indicate number of rows

См. также

Справочник

Statistic Класс

Перегрузка Update

Пространство имен Microsoft.SqlServer.Management.Smo

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