LinkedServer.EnumColumns Method (String, String, String, String)

Enumerates a list of columns that can be accessed on the linked server for a specified column.

Espace de noms: Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in microsoft.sqlserver.smo.dll)

Syntaxe

'Déclaration
Public Function EnumColumns ( _
    tableName As String, _
    schemaName As String, _
    databaseName As String, _
    columnName As String _
) As DataTable

public DataTable EnumColumns (
    string tableName,
    string schemaName,
    string databaseName,
    string columnName
)

public:
DataTable^ EnumColumns (
    String^ tableName, 
    String^ schemaName, 
    String^ databaseName, 
    String^ columnName
)

public DataTable EnumColumns (
    String tableName, 
    String schemaName, 
    String databaseName, 
    String columnName
)

public function EnumColumns (
    tableName : String, 
    schemaName : String, 
    databaseName : String, 
    columnName : String
) : DataTable

Paramètres

tableName
A String value that specifies the name of the table.

schemaName
A String value that specifies the name of the schema

databaseName
A String value that specifies the name of the database.

columnName
A String value that specifies the name of the column.

Valeur de retour

A DataTable object value that contains a list of tables that can be accessed on the linked server. The table describes the different columns of the returned DataTable.

Column	Data type	Description
COLUMN_SIZE	Int32	The number of significant digits in the column. The return value for the PRECISION column is in base 10.
BUFFER_LENGTH	Int32	The transfer size of the data to and from the column.
DECIMAL_DIGITS	Int32	The number of digits to the right of the decimal point.
NUM_PREC_RADIX	Int32	The base for numeric data types.
NULLABLE	Int32	The nullability of the column. 1 = NULL is possible. 0 = NOT NULL.
REMARKS	String	This field always returns NULL.
COLUMN_DEF	String	The default value of the column.
SQL_DATA_TYPE	Int32	The value of the SQL data type as it appears in the TYPE field of the descriptor. This column is the same as the DATA_TYPE column, except for the DateTime and SQL-92 interval data types. This column always returns a value.
SQL_DATETIMEE_SUB	Int32	The subtype code for DateTime and SQL-92 interval data types. For other data types, this column returns NULL.
CHAR_OCTET_LENGTH	Int32	The maximum length in bytes of a character or integer data type column. For all other data types, this column returns NULL.
ORDINAL_POSITION	Int32	The ordinal position of the column in the table. The first column in the table is 1. This column always returns a value.
IS_NULLABLE	String	The nullability of the column in the table. ISO rules are followed to determine nullability. An ISO SQL-compliant DBMS cannot return an empty string. YES = Column can include NULLS. NO = Column cannot include NULLS. This column returns a zero-length string if nullability is unknown. The value returned for this column is different from the value returned for the NULLABLE column.
SS_DATA_TYPE	Int32	The ordinal position of the column in the table. The first column in the table is 1. This column always returns a value.

Notes

Cet espace de noms, cette classe ou ce membre est pris en charge uniquement par la version 2.0 de Microsoft .NET Framework.

Exemple

How to: Link to an OLE-DB Provider Server in Visual Basic .NET

Sécurité des threads

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Plateformes

Plateformes de développement

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Plateformes cibles

Pour obtenir la liste des plateformes prises en charge, consultez Configuration matérielle et logicielle requise pour l'installation de SQL Server 2005.

Voir aussi

Référence

LinkedServer Class
LinkedServer Members
Microsoft.SqlServer.Management.Smo Namespace

Autres ressources

Using Linked Servers in SMO
Liaison des serveurs
sp_addlinkedserver (Transact-SQL)
sp_columns_ex (Transact-SQL)

Last updated on 2008-12-15

Partager via