String Describe Type Attribute StringDescribeType (SDT) Purpose Specifies whether all string columns are described as SQL_VARCHAR. This connection option affects SQL_Columns, SQLDescribeCol, SQLColAttributes, etc. It does not affect SQLGetTypeInfo. Valid Values -10 | -9 Behavior If set to -10 (SQL_WLONGVARCHAR), all string columns are described as SQL_WLONGVARCHAR. If set to -9 - (SQL_WVARCHAR), all string columns are described as SQL_WVARCHAR. Default -9 - SQL_WVARCHAR GUI Tab Advanced tab