DefaultConstraint 类
The DefaultConstraint object represents a SQL Server default constraint.
继承层次结构
System. . :: . .Object
Microsoft.SqlServer.Management.Smo. . :: . .SmoObjectBase
Microsoft.SqlServer.Management.Smo. . :: . .SqlSmoObject
Microsoft.SqlServer.Management.Smo. . :: . .NamedSmoObject
Microsoft.SqlServer.Management.Smo. . :: . .ScriptNameObjectBase
Microsoft.SqlServer.Management.Smo..::..DefaultConstraint
命名空间: Microsoft.SqlServer.Management.Smo
程序集: Microsoft.SqlServer.Smo(在 Microsoft.SqlServer.Smo.dll 中)
语法
声明
<SfcElementTypeAttribute("Default")> _
Public NotInheritable Class DefaultConstraint _
Inherits ScriptNameObjectBase _
Implements ICreatable, IDroppable, IRenamable, IAlterable, _
IExtendedProperties, IScriptable
用法
Dim instance As DefaultConstraint
[SfcElementTypeAttribute("Default")]
public sealed class DefaultConstraint : ScriptNameObjectBase,
ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties,
IScriptable
[SfcElementTypeAttribute(L"Default")]
public ref class DefaultConstraint sealed : public ScriptNameObjectBase,
ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties,
IScriptable
[<SealedAttribute>]
[<SfcElementTypeAttribute("Default")>]
type DefaultConstraint =
class
inherit ScriptNameObjectBase
interface ICreatable
interface IDroppable
interface IRenamable
interface IAlterable
interface IExtendedProperties
interface IScriptable
end
public final class DefaultConstraint extends ScriptNameObjectBase implements ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, IScriptable
DefaultConstraint 类型公开以下成员。
属性
名称 | 说明 | |
---|---|---|
CreateDate | Gets the date when the default constraint was created. | |
DateLastModified | Gets the date when the default constraint was last modified. | |
ExecuteForScalar | Gets or sets the Boolean property value that specifies whether the object is set to the execute for scalar option. (从 SqlSmoObject 继承。) | |
ExtendedProperties | Gets the extended properties of the default constraint. | |
ID | Gets the default constraint ID value. | |
IsSystemNamed | Gets the Boolean property value that specifies whether the default constraint was named by the system or the user. | |
IsTouched | Gets the Boolean property value that specifies whether the object properties have been updated but not yet persisted on the server. (从 SqlSmoObject 继承。) | |
Name | Gets or sets the name of the object. (从 NamedSmoObject 继承。) | |
ObjectInSpace | Gets the Boolean property value that specifies whether the object exists in isolation, or whether it is directly or indirectly connected to the instance of SQL Server. (从 SqlSmoObject 继承。) | |
Parent | Gets the Column object that is the parent of the DefaultConstraint object. | |
Properties | Gets a collection of Property objects that represent the object properties. (从 SqlSmoObject 继承。) | |
ScalarResult | Gets the scalar result for the referenced object. (从 SqlSmoObject 继承。) | |
State | Gets the state of the referenced object. (从 SmoObjectBase 继承。) | |
Text | Gets or sets the Transact-SQL statement that defines the default constraint. | |
Urn | Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (从 SqlSmoObject 继承。) | |
UserData | Gets or sets user-defined data associated with the referenced object. (从 SmoObjectBase 继承。) |
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方法
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显式接口实现
名称 | 说明 | |
---|---|---|
IAlienObjectDiscover | (从 SqlSmoObject 继承。) | |
IAlienObjectGetParent | (从 SqlSmoObject 继承。) | |
IAlienObjectGetProperty | (从 SqlSmoObject 继承。) | |
ISfcPropertyProviderGetPropertySet | (从 SqlSmoObject 继承。) | |
IAlienObjectGetUrn | (从 SqlSmoObject 继承。) | |
IAlienObjectResolve | (从 SqlSmoObject 继承。) | |
IAlienObjectSetProperty | (从 SqlSmoObject 继承。) |
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注释
To get DefaultConstraint object properties, users can be members of the public fixed server role.
To set DefaultConstraint object properties, users must have ALTER permission on the parent table or be a member of the db_owner fixed database role.
To create or drop a default constraint, users must have ALTER permission on the parent table or be a member of the db_owner fixed database role.
Thread Safety
此类型的任何公共静态(Microsoft Visual Basic 中的 Shared)成员在多线程操作中是安全的。 不保证所有实例成员都对于线程安全的。
线程安全
此类型的任何公共 static(在 Visual Basic 中为 Shared) 成员都是线程安全的。不保证所有实例成员都是线程安全的。