DefaultConstraint-Klasse

The DefaultConstraint object represents a SQL Server default constraint.

Vererbungshierarchie

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

Namespace:  Microsoft.SqlServer.Management.Smo
Assembly:  Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)

Syntax

'Declaration
<SfcElementTypeAttribute("Default")> _
Public NotInheritable Class DefaultConstraint _
    Inherits ScriptNameObjectBase _
    Implements ICreatable, IDroppable, IRenamable, IAlterable,  _
    IExtendedProperties, IScriptable, ISfcSupportsDesignMode
'Usage
Dim instance As DefaultConstraint

[SfcElementTypeAttribute("Default")]
public sealed class DefaultConstraint : ScriptNameObjectBase, 
    ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, 
    IScriptable, ISfcSupportsDesignMode

[SfcElementTypeAttribute(L"Default")]
public ref class DefaultConstraint sealed : public ScriptNameObjectBase, 
    ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, 
    IScriptable, ISfcSupportsDesignMode

[<SealedAttribute>]
[<SfcElementTypeAttribute("Default")>]
type DefaultConstraint =  
    class 
        inherit ScriptNameObjectBase 
        interface ICreatable 
        interface IDroppable 
        interface IRenamable 
        interface IAlterable 
        interface IExtendedProperties 
        interface IScriptable 
        interface ISfcSupportsDesignMode 
    end

public final class DefaultConstraint extends ScriptNameObjectBase implements ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, IScriptable, ISfcSupportsDesignMode

Der DefaultConstraint-Typ macht folgende Elemente verfügbar.

Eigenschaften

	Name	Beschreibung
	CreateDate	Gets the date when the default constraint was created.
	DateLastModified	Gets the date when the default constraint was last modified.
	ExtendedProperties	Gets the extended properties of the default constraint.
	ID	Gets the default constraint ID value.
	IsFileTableDefined	Gets or sets whether the file table is defined.
	IsSystemNamed	Gets the Boolean property value that specifies whether the default constraint was named by the system or the user.
	Name	Gets or sets the default constraint name. (Überschreibt NamedSmoObject.Name.)
	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. (Geerbt von SqlSmoObject.)
	State	Gets the state of the referenced object. (Geerbt von SmoObjectBase.)
	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. (Geerbt von SqlSmoObject.)
	UserData	Gets or sets user-defined data associated with the referenced object. (Geerbt von SmoObjectBase.)

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Methoden

	Name	Beschreibung
	Alter	Updates any DefaultConstraint object property changes on the instance of SQL Server.
	Create	Creates a default constraint in the parent database as defined by the DefaultConstraint object.
	Discover	Discovers a list of type Object. (Geerbt von SqlSmoObject.)
	Drop	Removes the default constraint.
	Equals	(Geerbt von Object.)
	FormatSqlVariant	Formats an object as SqlVariant type. (Geerbt von SqlSmoObject.)
	GetContextDB	Gets the context database that is associated with this object. (Geerbt von SqlSmoObject.)
	GetDBName	Gets the database name that is associated with the object. (Geerbt von SqlSmoObject.)
	GetHashCode	(Geerbt von Object.)
	GetPropValue	Gets a property value of the SqlSmoObject object. (Geerbt von SqlSmoObject.)
	GetPropValueOptional	Gets a property value of the SqlSmoObject object. (Geerbt von SqlSmoObject.)
	GetPropValueOptionalAllowNull	Gets a property value of the SqlSmoObject object. (Geerbt von SqlSmoObject.)
	GetServerObject	Gets the server of the SqlSmoObject object. (Geerbt von SqlSmoObject.)
	GetType	(Geerbt von Object.)
	Initialize()	Initializes the object and forces the properties be loaded. (Geerbt von SqlSmoObject.)
	Initialize(Boolean)	Initializes the object and forces the properties be loaded. (Geerbt von SqlSmoObject.)
	IsObjectInitialized	Verifies whether the object has been initialized. (Geerbt von SqlSmoObject.)
	IsObjectInSpace	Verifies whether the object is isolated or connected to the instance of SQL Server. (Geerbt von SqlSmoObject.)
	Refresh	Refreshes the script name. (Geerbt von ScriptNameObjectBase.)
	Rename	Renames the default constraint.
	Script()	Generates a Transact-SQL script that can be used to re-create the SQL Server default constraint.
	Script(ScriptingOptions)	Generates a Transact-SQL script that can be used to re-create the SQL Server default constraint as specified by the scripting options.
	SetParentImpl	Sets the parent of the SqlSmoObject to the newParent parameter. (Geerbt von SqlSmoObject.)
	ToString	Returns a String that represents the referenced object. (Geerbt von SqlSmoObject.)
	Validate	Validates the state of an object. (Geerbt von SmoObjectBase.)

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Ereignisse

	Name	Beschreibung
	PropertyChanged	Represents the event that occurs when a property is changed. (Geerbt von SqlSmoObject.)
	PropertyMetadataChanged	Represents the event that occurs when property metadata changes. (Geerbt von SqlSmoObject.)

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Explizite Schnittstellenimplementierungen

	Name	Beschreibung
	IAlienObject.Discover	Discovers any dependencies. Verweisen Sie nicht direkt im Code auf dieses Element. Unterstützt die SQL Server-Infrastruktur. (Geerbt von SqlSmoObject.)
	IAlienObject.GetDomainRoot	Returns the root of the domain. (Geerbt von SqlSmoObject.)
	IAlienObject.GetParent	Gets the parent of this object. Verweisen Sie nicht direkt im Code auf dieses Element. Unterstützt die SQL Server-Infrastruktur. (Geerbt von SqlSmoObject.)
	IAlienObject.GetPropertyType	Gets the type of the specified property. (Geerbt von SqlSmoObject.)
	IAlienObject.GetPropertyValue	Gets the value of the specified property. (Geerbt von SqlSmoObject.)
	IAlienObject.GetUrn	Gets the Unified Resource Name (URN) of the object. Verweisen Sie nicht direkt im Code auf dieses Element. Unterstützt die SQL Server-Infrastruktur. (Geerbt von SqlSmoObject.)
	IAlienObject.Resolve	Gets the instance that contains the information about the object from the Unified Resource Name (URN) of the object. (Geerbt von SqlSmoObject.)
	IAlienObject.SetObjectState	Sets the object state to the specified SfcObjectState value. (Geerbt von SqlSmoObject.)
	IAlienObject.SetPropertyValue	Sets the property value. (Geerbt von SqlSmoObject.)
	ISfcPropertyProvider.GetPropertySet	Gets the interface reference to the set of properties of this object. (Geerbt von SqlSmoObject.)
	ISfcSupportsDesignMode.IsDesignMode	Gets a Boolean value that indicates whether the object supports design mode.

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Hinweise

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

Alle öffentlichen, statischen Elemente dieses Typs (Shared in Microsoft Visual Basic) sind für Vorgänge mit mehreren Threads sicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.

Threadsicherheit

Alle öffentlichen static (Shared in Visual Basic)-Elemente dieses Typs sind Threadsicher. Für Instanzelemente wird die Threadsicherheit nicht gewährleistet.

Siehe auch

Verweis

Microsoft.SqlServer.Management.Smo-Namespace

Andere Ressourcen

Erzwingen der Datenintegrität