LinkedServer.EnumColumns Method ()
Enumerates a list of columns that can be accessed on the linked server.
Namespace: Microsoft.SqlServer.Management.Smo
Assembly: Microsoft.SqlServer.Smo (in microsoft.sqlserver.smo.dll)
Syntax
'Declaration
Public Function EnumColumns As DataTable
public DataTable EnumColumns ()
public:
DataTable^ EnumColumns ()
public DataTable EnumColumns ()
public function EnumColumns () : DataTable
Return Value
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 |
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 |
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. |
Remarks
This namespace, class, or member is supported only in version 2.0 of the Microsoft .NET Framework.
Example
How to: Link to an OLE-DB Provider Server in Visual Basic .NET
Thread Safety
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.
Platforms
Development Platforms
For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.
Target Platforms
For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.
See Also
Reference
LinkedServer Class
LinkedServer Members
Microsoft.SqlServer.Management.Smo Namespace
Other Resources
Using Linked Servers in SMO
Linking Servers
sp_addlinkedserver (Transact-SQL)
sp_columns_ex (Transact-SQL)