I wrote:
> What it looks like to me is that the code for setting up run-time
> partition pruning has failed to consider the possibility of nested
> partitioning: it's expecting that every partitioned table will have
> at least one direct child that is a leaf. I'm not sure though
> whether just the Assert is wrong, or there's more fundamental
> issues here.
After looking into the git history I realized that this assertion is
quite new, stemming from David's a929e17e5a8 of 2020-11-02. So there's
something not right about that.
regards, tom lane
