Controls how the Sybase IQ and Adaptive Server Anywhere ODBC driver describes CHAR columns.
ON, OFF
OFF
When a connection is opened, the Sybase IQ and Adaptive Server Anywhere ODBC driver uses the setting of this option to determine how CHAR columns are described. If this option is set to OFF (the default), then CHAR columns are described as SQL_VARCHAR. If this option is set to ON, then CHAR columns are described as SQL_CHAR. VARCHAR columns are always described as SQL_VARCHAR.
Chapter 4, “SQL Data Types” in Sybase IQ Reference Manual