IdentityRangeThreshold Property
后续版本的 Microsoft SQL Server 将删除该功能。请避免在新的开发工作中使用该功能，并着手修改当前还在使用该功能的应用程序。
The IdentityRangeThreshold property specifies when to assign a new range of values to an identity column at a Publisher or Subscriber.
语法
object
.IdentityRangeThreshold [= value]
Parts
object
An expression that evaluates to an object in the Applies To list.value
A long integer value from 1 through 100 that specifies (as a percentage of a Publisher's or Subscriber's range size) when a new identity range is allocated.
Data Type
Long
Modifiable
Read/write
Prototype (C/C++)
HRESULT GetIdentityRangeThreshold(LPLONG pRetVal);
HRESULT SetIdentityRangeThreshold(LONG NewValue);
注释
The identity range size specifies the maximum number of new rows that can be inserted into an identity column in a table at a Publisher or Subscriber before the starting point of the identity range must be reallocated. Use IdentityRangeThreshold to control when an identity range is reallocated.
The identity range threshold is defined as a percentage of the range size specified by the PublisherIdentityRangeSize or SubscriberIdentityRangeSizeproperties. For example, if the identity range size is 50,000, set IdentityRangeThreshold to 80 to reallocate an identity range when the current identity values used reaches 40,000 rows.
Prior to setting IdentityRangeThreshold, set AutoIdentityRange to TRUE, and specify identity range sizes using the PublisherIdentityRangeSize and SubscriberIdentityRangeSizeproperties.
.gif "注意") 注意 |
|---|
If an application calls IdentityRangeThreshold on an instance of Microsoft SQL Server version 7.0, the constant, SQLDMO_E_SQL80ONLY, and the message "This property or method requires Microsoft SQL Server 2000 or later" are returned. |