RAISES_NEG int
lobject_truncate(lobjectObject *self, size_t len)
{
int retvalue;
PGresult *pgres = NULL;
char *error = NULL;
Dprintf("lobject_truncate: fd = %d, len = " FORMAT_CODE_SIZE_T,
self->fd, len);
Py_BEGIN_ALLOW_THREADS;
pthread_mutex_lock(&(self->conn->lock));
#ifdef HAVE_LO64
if (self->conn->server_version < 90300) {
retvalue = lo_truncate(self->conn->pgconn, self->fd, len);
} else {
retvalue = lo_truncate64(self->conn->pgconn, self->fd, len);
}
#else
retvalue = lo_truncate(self->conn->pgconn, self->fd, len);
#endif
Dprintf("lobject_truncate: result = %d", retvalue);
if (retvalue < 0)
collect_error(self->conn, &error);
pthread_mutex_unlock(&(self->conn->lock));
Py_END_ALLOW_THREADS;
if (retvalue < 0)
pq_complete_error(self->conn, &pgres, &error);
return retvalue;
}
static void
my_truncate(PGconn *conn, Oid lobjId, pg_int64 len)
{
int lobj_fd;
lobj_fd = lo_open(conn, lobjId, INV_READ | INV_WRITE);
if (lobj_fd < 0)
fprintf(stderr, "cannot open large object %u", lobjId);
if (lo_truncate64(conn, lobj_fd, len) < 0)
fprintf(stderr, "error in lo_truncate64: %s", PQerrorMessage(conn));
lo_close(conn, lobj_fd);
}
