On 2021-Jan-24, Julien Rouhaud wrote: > + /* > + * Do not allow tuples with invalid combinations of hint bits to be > placed > + * on a page. These combinations are detected as corruption by the > + * contrib/amcheck logic, so if you disable one or both of these > + * assertions, make corresponding changes there. > + */ > + Assert(!((tuple->t_data->t_infomask & HEAP_XMAX_LOCK_ONLY) && > + (tuple->t_data->t_infomask2 & HEAP_KEYS_UPDATED))); > > > I attach a simple self contained script to reproduce the problem, the last > UPDATE triggering the Assert. > > I'm not really familiar with this part of the code, so it's not exactly clear > to me if some logic is missing in compute_new_xmax_infomask() / > heap_prepare_insert(), or if this should actually be an allowed combination of > hint bit.
Hmm, it's probably a bug in compute_new_xmax_infomask. I don't think the combination is sensible. -- Álvaro Herrera 39°49'30"S 73°17'W "There is evil in the world. There are dark, awful things. Occasionally, we get a glimpse of them. But there are dark corners; horrors almost impossible to imagine... even in our worst nightmares." (Van Helsing, Dracula A.D. 1972)
