Column Class
The Column object represents a SQL Server column.
Inheritance Hierarchy
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.Column
Namespace: Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)
Syntax
'Declaration
Public NotInheritable Class Column _
Inherits ScriptNameObjectBase _
Implements ISfcSupportsDesignMode, ICreatable, IAlterable, IDroppable, _
IMarkForDrop, IExtendedProperties, IRenamable
'Usage
Dim instance As Column
public sealed class Column : ScriptNameObjectBase,
ISfcSupportsDesignMode, ICreatable, IAlterable, IDroppable, IMarkForDrop,
IExtendedProperties, IRenamable
public ref class Column sealed : public ScriptNameObjectBase,
ISfcSupportsDesignMode, ICreatable, IAlterable, IDroppable, IMarkForDrop,
IExtendedProperties, IRenamable
[<SealedAttribute>]
type Column =
class
inherit ScriptNameObjectBase
interface ISfcSupportsDesignMode
interface ICreatable
interface IAlterable
interface IDroppable
interface IMarkForDrop
interface IExtendedProperties
interface IRenamable
end
public final class Column extends ScriptNameObjectBase implements ISfcSupportsDesignMode, ICreatable, IAlterable, IDroppable, IMarkForDrop, IExtendedProperties, IRenamable
The Column type exposes the following members.
Constructors
Name | Description | |
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Column() | Initializes a new instance of the Column class. |
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Column(SqlSmoObject, String) | Initializes a new instance of the Column class that has the specified parent and specified name. |
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Column(SqlSmoObject, String, DataType) | Initializes a new instance of the Column class that has the specified parent and specified name. |
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Column(SqlSmoObject, String, DataType, Boolean) | Initializes a new instance of the Column class that uses the specified parent, datayype, and optionally adding the FILESTREAM attribute. |
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Properties
Name | Description | |
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AnsiPaddingStatus | Gets a Boolean property value that specifies whether the ANSI_PADDING_ENABLED column option is active. |
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Collation | Gets or sets the default collation that is used by the column. |
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Computed | Gets the Boolean property value that specifies whether the column is the product of computed expression |
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ComputedText | Gets or sets the Transact-SQL expression that is used to generate the value of a computed column |
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DataType | Gets or sets the data type that is assigned to the column. |
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Default | Gets or sets the default bound to the column. |
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DefaultConstraint | Gets a default value for the column. |
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DefaultSchema | Gets or sets the default schema that is bound to the column. |
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ExecuteForScalar | Gets or sets the Boolean property value that specifies whether the object is set to the execute for scalar option. (Inherited from SqlSmoObject.) |
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ExtendedProperties | Represents a collection of ExtendedProperty objects. Each ExtendedProperty object represents an extended property for the Column object. |
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ID | Gets the column ID that uniquely identifies the column. |
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Identity | Gets or sets the Boolean property value that specifies whether the column is an identity column. |
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IdentityIncrement | Gets or sets the identity increment for an identity column. |
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IdentitySeed | Gets or sets the identity seed for an identity column. |
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InPrimaryKey | Gets the Boolean property value that specifies whether the column is included in the definition of a primary key or unique key constraint. |
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IsColumnSet | Gets or sets the Boolean property value that specifies whether the column has been set. |
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IsDeterministic | Gets or sets the Boolean property value that specifies whether the value of a computed column can change in subsequent invocations. |
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IsFileStream | Gets a boolean value that represents the FILESTREAM attribute of the column. |
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IsForeignKey | Gets the Boolean property value that specifies whether the column is a foreign key. |
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IsFullTextIndexed | Gets the Boolean property value that specifies whether the column participates in a full-text index. |
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IsPersisted | Gets the Boolean property value that specifies whether the computed value of the Column object is saved with the data, thus avoiding a computation each time the column is accessed. |
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IsPrecise | Gets or sets the Boolean property value that specifies whether a computed column is a precise value. |
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IsSparse | Gets or sets the Boolean property value that specifies whether the column value is sparse. |
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IsTouched | Gets the Boolean property value that specifies whether the object properties have been updated but not yet persisted on the server. (Inherited from SqlSmoObject.) |
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Name | Gets or sets a String value that specifies the name of the column. (Overrides NamedSmoObject.Name.) |
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NotForReplication | Gets the Boolean property value that specifies whether the column is participating in replication. |
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Nullable | Gets or sets the Boolean property value that specifies whether the column can accept null values. |
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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. (Inherited from SqlSmoObject.) |
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Parent | Gets the SqlSmoObject object that is the parent of the Column object. |
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Properties | Gets a collection of Property objects that represent the object properties. (Inherited from SqlSmoObject.) |
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RowGuidCol | Gets or sets the Boolean property value that specifies whether the column is automatically updated with a unique GUID value. |
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Rule | Gets or sets the rule that is bound to the column. |
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RuleSchema | Gets or sets the rule schema that is bound to the column. |
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ScalarResult | Gets the scalar result for the referenced object. (Inherited from SqlSmoObject.) |
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State | Gets the state of the referenced object. (Inherited from SmoObjectBase.) |
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Urn | Gets the Uniform Resource Name (URN) address value that uniquely identifies the object. (Inherited from SqlSmoObject.) |
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UserData | Gets or sets user-defined data associated with the referenced object. (Inherited from SmoObjectBase.) |
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Methods
Name | Description | |
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AddDatabaseContext(StringCollection) | Add the database context to the collection of queries identified by the queries parameter. (Inherited from SqlSmoObject.) |
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AddDatabaseContext(StringCollection, ScriptingOptions) | Add the database context to the collection of queries identified by the queries parameter, and using the specified scripting options. (Inherited from SqlSmoObject.) |
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AddDefaultConstraint() | Adds a default constraint to the column. |
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AddDefaultConstraint(String) | Adds a default constraint to the column. |
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Alter | Updates any Column object property changes on the instance of SQL Server. |
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AlterImpl | Activates the object altered event. (Inherited from SqlSmoObject.) |
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AlterImplFinish | Method called when object altered event finishes. (Inherited from SqlSmoObject.) |
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AlterImplInit | Method called when object-altered event is intialized. (Inherited from SqlSmoObject.) |
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AlterImplWorker | Calls the Alter methods. (Inherited from SqlSmoObject.) |
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AppendCommaText | Appends text, optionally separated by a comma. (Inherited from ScriptNameObjectBase.) |
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AppendWithCommaText | Appends text, optionally separated by a comma. (Inherited from ScriptNameObjectBase.) |
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AppendWithOption | Appends text and option text separated from the main text with a “WITH” string and optionally separated by a comma. (Inherited from ScriptNameObjectBase.) |
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AutoGenerateName | Generates a name based on the object Guid. (Inherited from ScriptNameObjectBase.) |
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BindDefault | Binds a default to the column. |
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BindDefaultImpl | Binds the default items identified by the parameters. (Inherited from SqlSmoObject.) |
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BindRule | Binds a rule to the column. |
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BindRuleImpl | Binds the rule schema to the rule and columns identified by the parameters. (Inherited from SqlSmoObject.) |
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CheckCollation | Checks the order of the scripting options by the collation method identified by the collationName parameter. (Inherited from SqlSmoObject.) |
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CheckObjectDirty | Checks whether object has been modified and not persisted. (Inherited from ScriptNameObjectBase.) |
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CheckObjectState() | Validates the state of the referenced object. (Inherited from SqlSmoObject.) |
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CheckObjectState(Boolean) | Validates the state of the referenced object with the option to specify that an exception is thrown if the object is not yet created. (Inherited from SqlSmoObject.) |
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CheckObjectStateImpl | Checks the state of a SqlSmoObject. (Inherited from SqlSmoObject.) |
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CheckTextCorectness | Checks text for correctness against the parameters. (Inherited from ScriptNameObjectBase.) |
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CheckTextModeSupport | Checks mode of support. (Inherited from ScriptNameObjectBase.) |
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CheckVersion100 | Checks whether version of SQL Server is SQL Server 2008. (Inherited from SqlSmoObject.) |
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CheckVersion80 | Checks the validity of the object on SQL Server 2000. (Inherited from SqlSmoObject.) |
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CheckVersion80SP3 | Checks the validity of the object on SQL Server 2000 SP3. (Inherited from SqlSmoObject.) |
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CheckVersion90 | Check the validity of the object on SQL Server 2005. (Inherited from SqlSmoObject.) |
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CheckVersionBelow90 | Checks whether version of SQL Server is before SQL Server 2005. (Inherited from SqlSmoObject.) |
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CleanObject | Cleans the referenced object. (Inherited from ScriptNameObjectBase.) |
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Create | Creates a column on the instance of Microsoft SQL Server as defined by the Column object. |
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CreateImpl | Creates an object with scripting options. (Inherited from SqlSmoObject.) |
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CreateImplFinish | Method called when the create event finishes. (Inherited from SqlSmoObject.) |
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CreateImplInit | Method called when the create event initializes. (Inherited from SqlSmoObject.) |
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Discover | Discovers a list of type Object. (Inherited from SqlSmoObject.) |
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Drop | Drops the column. |
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DropImpl | Drops a SqlSmoObject. (Inherited from SqlSmoObject.) |
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DropImplWorker | Calls the drop methods. (Inherited from SqlSmoObject.) |
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EnumForeignKeys | Enumerates a list of foreign keys that reference the column. |
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EnumIndexes | Enumerates a list of indexes that include the column. |
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EnumScriptImpl | Enumerates scripts specified by the so parameter. (Inherited from SqlSmoObject.) |
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EnumScriptImplWorker | Calls the methods that enumerate scripts specified by the so parameter. (Inherited from SqlSmoObject.) |
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EnumScriptImplWorkerSOChanged | Returns an IEnumerable string describing the scripting options for an object. (Inherited from SqlSmoObject.) |
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EnumUserPermissions | Enumerates a list of permissions for a specified user. |
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Equals | (Inherited from Object.) |
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ExecuteNonQuery | Executes a batch in the context of the database where there are no results returned. (Inherited from SqlSmoObject.) |
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Finalize | (Inherited from Object.) |
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ForceTextModeOnTextBody | Enforces text mode on the text body. (Inherited from ScriptNameObjectBase.) |
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FormatSqlVariant | Formats an object as SqlVariant type. (Inherited from SqlSmoObject.) |
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GenerateDataSpaceFileStreamScript | Generates a script to create data file. (Inherited from SqlSmoObject.) |
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GenerateDataSpaceScript | Generates a script to allocate space in the data file. (Inherited from SqlSmoObject.) |
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GetBindDefaultScript | Gets the script that binds defaults specified by the defSchema and defName parameters. (Inherited from SqlSmoObject.) |
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GetBindRuleScript | Gets the script that specifies the binding rules. (Inherited from SqlSmoObject.) |
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GetBoolParameter(StringBuilder, ScriptingOptions, String, String, Int32%) | Assigns a Boolean parameter of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetBoolParameter(StringBuilder, ScriptingOptions, String, String, Int32%, Boolean) | Assigns a Boolean property of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetBraketNameForText | Gets the bracket name. (Inherited from ScriptNameObjectBase.) |
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GetDateTimeParameter | Assigns the datetime property of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetDateTimeParameterAsInt | Assigns the datetime property of the SqlSmoObject as an integer value if the datetime property is not null. (Inherited from SqlSmoObject.) |
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GetDBName | Gets the database name that is associated with the object. (Inherited from SqlSmoObject.) |
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GetEnumParameter | Assigns an enumeration property of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetFragOptionString | Gets a FragmentationOption object as a string value. (Inherited from SqlSmoObject.) |
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GetGuidParameter | Assigns a Guid property of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetHashCode | (Inherited from Object.) |
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GetIsSystemNamed | Gets a Boolean value that specifies whether the system is named. (Inherited from ScriptNameObjectBase.) |
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GetIsTextDirty | Determines whether the text value is consistent with stored value. (Inherited from ScriptNameObjectBase.) |
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GetParameter(StringBuilder, ScriptingOptions, String, String, Int32%) | Assigns a parameter of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetParameter(StringBuilder, ScriptingOptions, String, String, Int32%, Boolean) | Assigns a parameter of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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GetPropValue | Gets a property value of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetPropValueOptional | Gets a property value of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetPropValueOptionalAllowNull | Gets a property value of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetRealValue | Gets a property value of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetScriptIncludeExists | Gets the script including the test for existence of type being scripted. (Inherited from ScriptNameObjectBase.) |
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GetScriptingOptionsForCreate | Gets ScriptingOptions for the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetServerName | Gets the name of the instance of SQL Server with which the object is associated. (Inherited from SqlSmoObject.) |
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GetServerObject | Gets the server of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetSqlServerVersionName | Gets the version name of the instance of SQL Server with which the object is associated. (Inherited from SqlSmoObject.) |
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GetStringParameter(StringBuilder, ScriptingOptions, String, String, Int32%) | Assigns a string parameter of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetStringParameter(StringBuilder, ScriptingOptions, String, String, Int32%, Boolean) | Assigns a string parameter of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetTextBody() | Returns the text body. (Inherited from ScriptNameObjectBase.) |
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GetTextBody(Boolean) | Returns the text body. (Inherited from ScriptNameObjectBase.) |
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GetTextForScript(ScriptingOptions, Boolean, array<String[]) | Gets the text for scripting. (Inherited from ScriptNameObjectBase.) |
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GetTextForScript(ScriptingOptions, Boolean, array<String[], Boolean) | Gets the text of script object. (Inherited from ScriptNameObjectBase.) |
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GetTextHeader | Returns the text header. (Inherited from ScriptNameObjectBase.) |
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GetTextMode | Determines whether the script name is using text mode. (Inherited from ScriptNameObjectBase.) |
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GetTextProperty(String) | Gets the property as text. (Inherited from ScriptNameObjectBase.) |
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GetTextProperty(String, ScriptingOptions) | Gets the property as text. (Inherited from ScriptNameObjectBase.) |
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GetTimeSpanParameterAsInt | Assigns a time span parameter of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetType | (Inherited from Object.) |
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GetUrnRecursive(StringBuilder) | Assigns an Urn object of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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GetUrnRecursive(StringBuilder, UrnIdOption) | Assigns an Urn object of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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ImplInitialize | Initializes the fields of the SqlSmoObject object. (Inherited from SqlSmoObject.) |
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Initialize() | Initializes the object and forces the properties be loaded. (Inherited from SqlSmoObject.) |
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Initialize(Boolean) | Initializes the object and forces the properties be loaded. (Inherited from SqlSmoObject.) |
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IsObjectDirty | Determines whether the referenced object is consistent with the stored object. (Inherited from ScriptNameObjectBase.) |
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IsObjectInitialized | Verifies whether the object has been initialized. (Inherited from SqlSmoObject.) |
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IsObjectInSpace | Verifies whether the object is isolated or connected to the instance of SQL Server. (Inherited from SqlSmoObject.) |
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IsVersion80SP3 | Determines whether the version of SQL Server is SQL Server 2000 with SP3. (Inherited from SqlSmoObject.) |
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IsVersion90AndAbove | Determines whether the version of SQL Server is SQL Server 2005 or later. (Inherited from SqlSmoObject.) |
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MarkDropped | Sets the SqlSmoState to dropped. (Inherited from SqlSmoObject.) |
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MarkForDrop | Marks the column to be dropped when the Alter method is run on the column's parent Table object. |
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MarkForDropImpl | Sets the SqlSmoState to dropped. (Inherited from SqlSmoObject.) |
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MemberwiseClone | (Inherited from Object.) |
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PostAlter | Method activated after the SqlSmoObject is altered. (Inherited from SqlSmoObject.) |
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PostCreate | Method activated after the SqlSmoObject is created. (Inherited from SqlSmoObject.) |
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PostDrop | Method activated after the SqlSmoObject is dropped. (Inherited from SqlSmoObject.) |
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Refresh | Refreshes the Column object properties. (Overrides ScriptNameObjectBase.Refresh().) |
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Rename | Renames the column. |
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RenameImpl | Identified for informational purposes only. Not supported. Future compatibility is not guaranteed. (Inherited from NamedSmoObject.) |
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RenameImplWorker | Identified for informational purposes only. Not supported. Future compatibility is not guaranteed. (Inherited from NamedSmoObject.) |
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ScriptAlter | Alters the SqlSmoObject according to the parameters. (Inherited from SqlSmoObject.) |
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ScriptAnsiQI | Scripts the database object in ANSI text. (Inherited from ScriptNameObjectBase.) |
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ScriptChangeOwner | This method supports the SMO infrastructure and is not intended to be used directly from your code. (Inherited from NamedSmoObject.) |
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ScriptCreate | Alters the SqlSmoObject according to the parameters. (Inherited from SqlSmoObject.) |
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ScriptDdl | Throws InvalidSmoOperationException. (Inherited from SqlSmoObject.) |
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ScriptDrop | Throws InvalidSmoOperationException. (Inherited from SqlSmoObject.) |
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ScriptImpl() | Gets a collection of scripts of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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ScriptImpl(ScriptingOptions) | Gets a collection of scripts of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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ScriptImplWorker | Gets a collection of scripts of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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ScriptInformativeHeaders | Scripts the information headers. (Inherited from ScriptNameObjectBase.) |
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ScriptOwner | Alters the script owner authorization. (Inherited from NamedSmoObject.) |
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ScriptRename | This method supports the SMO infrastructure and is not intended to be used directly from your code. (Inherited from NamedSmoObject.) |
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SetCollectionTextMode | Sets the collection text mode. (Inherited from ScriptNameObjectBase.) |
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SetIsSystemNamed | Sets a Boolean value that specifies whether the system is named. (Inherited from ScriptNameObjectBase.) |
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SetParentImpl | Sets the parent of the SqlSmoObject to the newParent parameter. (Inherited from SqlSmoObject.) |
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SetSchemaOwned | Sets the schema owned value. (Inherited from NamedSmoObject.) |
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SetTextBody | Specifies the text body. (Inherited from ScriptNameObjectBase.) |
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SetTextHeader | Specifies the text header. (Inherited from ScriptNameObjectBase.) |
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SetTextMode | Specifies the text mode. (Inherited from ScriptNameObjectBase.) |
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SwitchTextMode | Switches the text mode. (Inherited from ScriptNameObjectBase.) |
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ThrowIfTextIsDirtyForAlter | Throws an exception of text has been modified and not persisted. (Inherited from ScriptNameObjectBase.) |
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ToString | Returns a String that represents the referenced object. (Inherited from SqlSmoObject.) |
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TouchImpl | Not implemented. (Inherited from SqlSmoObject.) |
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UnbindDefault | Unbinds the currently bound default from the column. |
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UnbindDefaultImpl | Unbinds the default columns of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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UnbindRule | Unbinds the currently bound rule from the column. |
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UnbindRuleImpl | Unbinds rules of the SqlSmoObject. (Inherited from SqlSmoObject.) |
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UpdateStatistics() | Updates Statistic objects that monitor this column. |
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UpdateStatistics(StatisticsScanType) | Updates Statistic objects that monitor this column. |
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UpdateStatistics(StatisticsScanType, Int32) | Updates Statistic objects that monitor this column using a sampled scan. |
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UpdateStatistics(StatisticsScanType, Int32, Boolean) | Updates Statistic objects that monitor this column using a sampled scan. |
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Validate | Validates the state of an object. (Inherited from SmoObjectBase.) |
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Events
Name | Description | |
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PropertyChanged | Represents the event that occurs when a property is changed. (Inherited from SqlSmoObject.) |
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PropertyMetadataChanged | Represents the event that occurs when property metadata changes. (Inherited from SqlSmoObject.) |
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Fields
Name | Description | |
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m_ExtendedProperties | Represents a property that is defined to extend the properties provided by a SqlSmoObject. (Inherited from SqlSmoObject.) |
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singletonParent | Represents the singleton parent. (Inherited from SqlSmoObject.) |
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Explicit Interface Implementations
Name | Description | |
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IAlienObject.Discover | Discovers any dependencies. Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SqlSmoObject.) |
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IAlienObject.GetDomainRoot | Returns the root of the domain. (Inherited from SqlSmoObject.) |
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IAlienObject.GetParent | Gets the parent of this object. Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SqlSmoObject.) |
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IAlienObject.GetPropertyType | Gets the type of the specified property. (Inherited from SqlSmoObject.) |
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IAlienObject.GetPropertyValue | Gets the value of the specified property. (Inherited from SqlSmoObject.) |
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IAlienObject.GetUrn | Gets the Unified Resource Name of the object. Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SqlSmoObject.) |
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IAlienObject.Resolve | Gets the instance that contains the information about the object from the Unified Resource Name of the object. (Inherited from SqlSmoObject.) |
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IAlienObject.SetObjectState | Sets the object state to the specified SfcObjectState value. (Inherited from SqlSmoObject.) |
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IAlienObject.SetPropertyValue | Sets the property value. (Inherited from SqlSmoObject.) |
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ISfcPropertyProvider.GetPropertySet | Gets the interface reference to the set of properties of this object. Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SqlSmoObject.) |
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ISfcSupportsDesignMode.IsDesignMode | Gets a Boolean value that specifies whether the column supports design mode. |
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Remarks
To get Column object properties, users can be a member of the public fixed server role.
To do any of the following, users must have ALTER permission on the parent table, or be a member of the db_owner fixed database role:
Set Column object properties and run the Alter method
Create a column
Drop a column
Thread Safety
Any public static (Shared in Microsoft Visual Basic) members of this type are safe for multithreaded operations. Any instance members are not guaranteed to be thread safe.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
See Also