LinkedServer.EnumColumns Method (String)

2008-12-15

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

命名空间: Microsoft.SqlServer.Management.Smo
程序集: Microsoft.SqlServer.Smo (in microsoft.sqlserver.smo.dll)

语法

声明
Public Function EnumColumns ( _
    tableName As String _
) As DataTable

public DataTable EnumColumns (
    string tableName
)

public:
DataTable^ EnumColumns (
    String^ tableName
)

public DataTable EnumColumns (
    String tableName
)

public function EnumColumns (
    tableName : String
) : DataTable

参数

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

返回值

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.

备注

仅 Microsoft .NET Framework 的 2.0 版本支持此命名空间、类或成员。

示例

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

线程安全

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.