ColumnMaxLength Property

В будущей версии Microsoft SQL Server эта возможность будет удалена. Избегайте использования этой возможности в новых разработках и запланируйте изменение существующих приложений, в которых она применяется.

The ColumnMaxLength property exposes the maximum number of characters required to store the data of a column in the current result set of a QueryResults object.

Синтаксис

object
.ColumnMaxLength(
OrdinalColumn
)

Parts

• object
  An expression that evaluates to an object in the Applies To list.

• OrdinalColumn
  A long integer that specifies the column in the results by position.

Data Type

String

Modifiable

Read-only

Prototype (C/C++)

HRESULT GetColumnMaxLength(long nColumn, LPLONG pRetVal);

Замечания

Interpret the value of the ColumnMaxLength property with respect to the data type of the column in the result set. Retrieve the data type using the ColumnType property.

ColumnType property	ColumnMaxLength
SQLDMO_DTypeBinary, SQLDMO_DTypeGUID, SQLDMO_DTypeImage, SQLDMO_DTypeNText, SQLDMO_DTypeText, or SQLDMO_DTypeVarBinary	A system-defined value. Use the GetColumnBinaryLength method to determine the length of a specified row value.
SQLDMO_DTypeBit, SQLDMO_DTypeFloat8, SQLDMO_DTypeInt1, SQLDMO_DTypeInt2, SQLDMO_DTypeInt4, SQLDMO_DTypeMoney, or SQLDMO_DTypeMoney4	The maximum precision of a value of the type.
SQLDMO_DTypeChar, SQLDMO_DTypeVarchar, SQLDMO_DTypeUChar, or SQLDMO_DTypeUVarchar	The count of bytes required to represent the data as a Unicode character string (two bytes per character). The count is incremented to include the count of bytes in a string terminator.
SQLDMO_DTypeDateTime or SQLDMO_DTypeDateTime4	A system-defined value.

Applies To:

QueryResults Object