Function PQresultVerboseErrorMessage

src/interfaces/libpq/fe-exec.c:3240–3269

}

char *
PQresultVerboseErrorMessage(const PGresult *res,
							PGVerbosity verbosity,
							PGContextVisibility show_context)
{
	PQExpBufferData workBuf;

	/*
	 * Because the caller is expected to free the result string, we must
	 * strdup any constant result.  We use plain strdup and document that
	 * callers should expect NULL if out-of-memory.
	 */
	if (!res ||
		(res->resultStatus != PGRES_FATAL_ERROR &&
		 res->resultStatus != PGRES_NONFATAL_ERROR))
		return strdup(libpq_gettext("PGresult is not an error result\n"));

	initPQExpBuffer(&workBuf);

	pqBuildErrorMessage3(&workBuf, res, verbosity, show_context);

	/* If insufficient memory to format the message, fail cleanly */
	if (PQExpBufferDataBroken(workBuf))
	{
		termPQExpBuffer(&workBuf);
		return strdup(libpq_gettext("out of memory\n"));
	}

	return workBuf.data;
}

char *
PQresultErrorField(const PGresult *res, int fieldcode)