Specifies that SQL inserts into the program the SQLCA and a
    message vector (RDB$MESSAGE_VECTOR) structure specific to
    supported database systems. Both the SQLCA and the message vector
    provide ways of handling error conditions:

    o  The SQLCA is a collection of variables that SQL uses to
       provide information about the execution of SQL statements
       to application programs. The SQLCA shows if a statement was
       successful and, for some conditions, the particular error when
       a statement was not successful.

    o  The message vector is also a collection of variables that SQL
       updates after SQL executes a statement. The message vector
       also lets programs check if a statement was successful, but
       provides more detail than the SQLCA about the type of error
       condition if a statement was not successful.

    For more information on the SQLCA and the message vector, see the
    Oracle Rdb SQL Reference Manual.