GetColumnSQLVARIANTDataType Method
The GetColumnSQLVARIANTDataType method retrieves the underlying data type of the specified sql_variant column.
Applies To
| QueryResults2 Object |
Syntax
object.GetColumnSQLVARIANTDataType(
Row ,
Column ,
ObjName ) as String
Parts
object
Expression that evaluates to an object in the Applies To list
Row
Long integer that identifies a row by ordinal position
Column
Long integer that identifies a column by ordinal position
ObjName
String that specifies a table or view name
Prototype (C/C++)
HRESULT GetColumnSQLVARIANTDataType(
long lRow,
long lColumn,
SQLDMO_LPCSTR ObjName,
SQLDMO_LPBSTR pRetVal);
Note SQL-DMO strings are returned as OLE BSTR objects. A C/C++ application obtains a reference to the string. The application must release the reference using SysFreeString.
Remarks
An application written in C++ can use the information returned by the GetColumnSQLVARIANTDataType and GetColumnSQLVARIANTLength methods to allocate an appropriate amount of buffer space in which to manipulate the data retrieved from a sql_variant column.
The application can then call GetColumnSQLVARIANT to return the contents of a sql_variant column as an array. The application can then cast the contents of the array into the required data type.
Note If an application calls GetColumnSQLVARIANTDataType on an instance of SQL Server version 7.0, the constant, SQLDMO_E_SQL80ONLY, and the message "This property or method requires Microsoft SQL Server 2000" are returned.