ODBC operations return success, error or‘success with info'.
This section explains how results from the ODBC layer are reported to
Prolog.
If an ODBC operation returns‘with info', the info is extracted
from the interface and handled to the Prolog message dispatcher print_message/2.
The level of the message is informational and the term is
of the form:
- odbc(State, Native, Message)
- Here, State is the SQL-state as defined in the ODBC API,
Native is the (integer) error code of the underlying data
source and Message is a human readable explanation of the
message.
If an ODBC operation signals an error, it throws the exception
error(odbc(State, Native, Message), _). The
arguments of the odbc/3 term are explained in section
2.8.1.
In addition, the Prolog layer performs the normal tests for proper
arguments and state, signaling the conventional instantiation, type,
domain and resource exceptions.
