Classe DefaultConstraint
The DefaultConstraint object represents a SQL Server default constraint.
Hiérarchie d'héritage
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
Espace de noms : Microsoft.SqlServer.Management.Smo
Assembly : Microsoft.SqlServer.Smo (en Microsoft.SqlServer.Smo.dll)
Syntaxe
'Déclaration
<SfcElementTypeAttribute("Default")> _
Public NotInheritable Class DefaultConstraint _
Inherits ScriptNameObjectBase _
Implements ICreatable, IDroppable, IRenamable, IAlterable, _
IExtendedProperties, IScriptable, ISfcSupportsDesignMode
'Utilisation
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
Le type DefaultConstraint expose les membres suivants.
Propriétés
Nom | Description | |
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CreateDate | Gets the date when the default constraint was created. |
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DateLastModified | Gets the date when the default constraint was last modified. |
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ExtendedProperties | Gets the extended properties of the default constraint. |
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ID | Gets the default constraint ID value. |
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IsFileTableDefined | Gets or sets whether the file table is defined. |
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IsSystemNamed | Gets the Boolean property value that specifies whether the default constraint was named by the system or the user. |
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Name | Gets or sets the default constraint name. (remplace NamedSmoObject.Name.) |
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Parent | Gets the Column object that is the parent of the DefaultConstraint object. |
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Properties | Gets a collection of Property objects that represent the object properties. (hérité de SqlSmoObject.) |
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State | Gets the state of the referenced object. (hérité de SmoObjectBase.) |
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Text | Gets or sets the Transact-SQL statement that defines the default constraint. |
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Urn | Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (hérité de SqlSmoObject.) |
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UserData | Gets or sets user-defined data associated with the referenced object. (hérité de SmoObjectBase.) |
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Méthodes
Nom | Description | |
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Alter | Updates any DefaultConstraint object property changes on the instance of SQL Server. |
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Create | Creates a default constraint in the parent database as defined by the DefaultConstraint object. |
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Discover | Discovers a list of type Object. (hérité de SqlSmoObject.) |
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Drop | Removes the default constraint. |
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Equals | (hérité de Object.) |
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FormatSqlVariant | Formats an object as SqlVariant type. (hérité de SqlSmoObject.) |
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GetContextDB | Gets the context database that is associated with this object. (hérité de SqlSmoObject.) |
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GetDBName | Gets the database name that is associated with the object. (hérité de SqlSmoObject.) |
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GetHashCode | (hérité de Object.) |
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GetPropValue | Gets a property value of the SqlSmoObject object. (hérité de SqlSmoObject.) |
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GetPropValueOptional | Gets a property value of the SqlSmoObject object. (hérité de SqlSmoObject.) |
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GetPropValueOptionalAllowNull | Gets a property value of the SqlSmoObject object. (hérité de SqlSmoObject.) |
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GetServerObject | Gets the server of the SqlSmoObject object. (hérité de SqlSmoObject.) |
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GetType | (hérité de Object.) |
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Initialize() | Initializes the object and forces the properties be loaded. (hérité de SqlSmoObject.) |
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Initialize(Boolean) | Initializes the object and forces the properties be loaded. (hérité de SqlSmoObject.) |
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IsObjectInitialized | Verifies whether the object has been initialized. (hérité de SqlSmoObject.) |
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IsObjectInSpace | Verifies whether the object is isolated or connected to the instance of SQL Server. (hérité de SqlSmoObject.) |
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Refresh | Refreshes the script name. (hérité de ScriptNameObjectBase.) |
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Rename | Renames the default constraint. |
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Script() | Generates a Transact-SQL script that can be used to re-create the SQL Server default constraint. |
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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. |
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SetParentImpl | Sets the parent of the SqlSmoObject to the newParent parameter. (hérité de SqlSmoObject.) |
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ToString | Returns a String that represents the referenced object. (hérité de SqlSmoObject.) |
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Validate | Validates the state of an object. (hérité de SmoObjectBase.) |
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Événements
Nom | Description | |
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PropertyChanged | Represents the event that occurs when a property is changed. (hérité de SqlSmoObject.) |
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PropertyMetadataChanged | Represents the event that occurs when property metadata changes. (hérité de SqlSmoObject.) |
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Implémentations d'interfaces explicites
Nom | Description | |
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IAlienObject.Discover | Discovers any dependencies. Ne faites pas directement référence à ce membre dans votre code. Il prend en charge l'infrastructure SQL Server. (hérité de SqlSmoObject.) |
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IAlienObject.GetDomainRoot | Returns the root of the domain. (hérité de SqlSmoObject.) |
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IAlienObject.GetParent | Gets the parent of this object. Ne faites pas directement référence à ce membre dans votre code. Il prend en charge l'infrastructure SQL Server. (hérité de SqlSmoObject.) |
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IAlienObject.GetPropertyType | Gets the type of the specified property. (hérité de SqlSmoObject.) |
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IAlienObject.GetPropertyValue | Gets the value of the specified property. (hérité de SqlSmoObject.) |
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IAlienObject.GetUrn | Gets the Unified Resource Name (URN) of the object. Ne faites pas directement référence à ce membre dans votre code. Il prend en charge l'infrastructure SQL Server. (hérité de SqlSmoObject.) |
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IAlienObject.Resolve | Gets the instance that contains the information about the object from the Unified Resource Name (URN) of the object. (hérité de SqlSmoObject.) |
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IAlienObject.SetObjectState | Sets the object state to the specified SfcObjectState value. (hérité de SqlSmoObject.) |
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IAlienObject.SetPropertyValue | Sets the property value. (hérité de SqlSmoObject.) |
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ISfcPropertyProvider.GetPropertySet | Gets the interface reference to the set of properties of this object. (hérité de SqlSmoObject.) |
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ISfcSupportsDesignMode.IsDesignMode | Gets a Boolean value that indicates whether the object supports design mode. |
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Notes
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
Tout membre statique public (Partagé dans Microsoft Visual Basic) de ce type est sûr dans le cadre des opérations à plusieurs threads. Tous les membres de l'instance ne sont pas garantis comme étant thread-safe.
Sécurité des threads
Tous les membres publics static (Shared dans Visual Basic) de ce type sont thread-safe. Tous les membres de l'instance ne sont pas garantis comme étant thread-safe.
Voir aussi
Référence
Espace de noms Microsoft.SqlServer.Management.Smo