The CS_EXTRA_INF property determines whether or not Client-Library returns certain kinds of informational messages.
An application that is retrieving messages into a SQLCA, SQLCODE, or SQLSTATE should set the Client-Library property CS_EXTRA_INF to CS_TRUE. This is because the SQL structures require information that Client-Library does not customarily return. If CS_EXTRA_INF is not set, you may lose information.
An application that is not using the SQL structures can also set CS_EXTRA_INF to CS_TRUE. In this case, the extra information is returned as standard Client-Library messages.
The additional information returned includes the number of rows affected by the most recent command.
