| PostgreSQL 8.1.23 Documentation | ||||
|---|---|---|---|---|
| Prev | Fast Backward | Chapter 28. libpq - C Library | Fast Forward | Next |
These functions control miscellaneous details of libpq's behavior.
PQsetErrorVerbosityDetermines the verbosity of messages returned by
PQerrorMessage and
PQresultErrorMessage.
typedef enum {
PQERRORS_TERSE,
PQERRORS_DEFAULT,
PQERRORS_VERBOSE
} PGVerbosity;
PGVerbosity PQsetErrorVerbosity(PGconn *conn, PGVerbosity verbosity);
PQsetErrorVerbosity sets
the verbosity mode, returning the connection's previous
setting. In TERSE mode, returned
messages include severity, primary text, and position only;
this will normally fit on a single line. The default mode
produces messages that include the above plus any detail,
hint, or context fields (these may span multiple lines).
The VERBOSE mode includes all
available fields. Changing the verbosity does not affect
the messages available from already-existing PGresult objects, only
subsequently-created ones.
PQtraceEnables tracing of the client/server communication to a debugging file stream.
void PQtrace(PGconn *conn, FILE *stream);
Note: On Windows, if the libpq library and an application are compiled with different flags, this function call will crash the application because the internal representation of the FILE pointers differ. Specifically, multithreaded/single-threaded, release/debug, and static/dynamic flags should be the same for the library and all applications using that library.
PQuntraceDisables tracing started by PQtrace.
void PQuntrace(PGconn *conn);