On 2021-Apr-04, Tomas Vondra wrote:
> 1) I still don't understand why inheritance and declarative partitioning
> are treated differently. Seems unnecessary nad surprising, but maybe
> there's a good reason?
I think there is a good reason to treat them the same: pgstat does not
have a provision to keep stats both of the table with children, and the
table without children. It can only have one of those. For
partitioning that doesn't matter: since the table-without-children
doesn't have anything on its own (no scans, no tuples, no nothing) then
we can just use the entry to store the table-with-children data. But
for the inheritance case, the parent can have its own tuples and counts
its own scans and so on; so if we change things, we'll overwrite the
stats. Maybe in the long-term we should allow pgstat to differentiate
those cases, but that seems not in scope for this patch.
I'm working on the code to fix the other issues.
--
Álvaro Herrera 39°49'30"S 73°17'W
