Partially supported and unsupported ODBC features

Transaction processing
HCL Informix ODBC Driver implementation of transaction isolation levels and transaction modes is slightly different from the Microsoft ODBC implementation of these features.

ODBC cursors
HCL Informix ODBC Driver supports static and forward cursors but not dynamic and keyset-driven cursors.

ODBC bookmarks
A bookmark is a value that identifies a row of data.

SQLBulkOperations
HCL Informix ODBC Driver supports only the SQL_ADD argument of SQLBulkOperations.

SQLDescribeParam
SQLDescribeParam is an ODBC API which returns metadata for the parameters of a query.

Unsupported Microsoft ODBC driver features
HCL Informix ODBC Driver does not support implementation of the certain Microsoft ODBC driver features.