Function PQfn

src/interfaces/libpq/fe-exec.c:2871–2909

 */

PGresult *
PQfn(PGconn *conn,
	 int fnid,
	 int *result_buf,
	 int *result_len,
	 int result_is_int,
	 const PQArgBlock *args,
	 int nargs)
{
	*result_len = 0;

	if (!conn)
		return NULL;

	/*
	 * Since this is the beginning of a query cycle, reset the error buffer.
	 */
	resetPQExpBuffer(&conn->errorMessage);

	if (conn->pipelineStatus != PQ_PIPELINE_OFF)
	{
		appendPQExpBufferStr(&conn->errorMessage,
							 libpq_gettext("PQfn not allowed in pipeline mode\n"));
		return NULL;
	}

	if (conn->sock == PGINVALID_SOCKET || conn->asyncStatus != PGASYNC_IDLE ||
		conn->result != NULL)
	{
		appendPQExpBufferStr(&conn->errorMessage,
							 libpq_gettext("connection in wrong state\n"));
		return NULL;
	}

	return pqFunctionCall3(conn, fnid,
						   result_buf, result_len,
						   result_is_int,
						   args, nargs);
}

/* ====== Pipeline mode support ======== */