Re: Record a Bitmapset of non-pruned partitions

On Thu, 30 Sept 2021 at 20:25, Amit Langote <amitlangote09(at)gmail(dot)com> wrote:
> Related to the above, I noticed while looking at
> build_merged_partition_bounds() that db632fbca3 missed adding a line
> to that function to set interleaved_parts to NULL. Because the
> PartitionBoundInfo is only palloc'd (not palloc0'd), interleaved_parts
> of a "merged" bounds struct ends up pointing to garbage, so let's fix
> that. Attached a patch.

Thanks for the patch.

I think we also need to document that interleaved_parts is not set for
join relations, otherwise someone may in the future try to use that
field for an optimisation for join relations. At the moment, per
generate_orderedappend_paths, we only handle IS_SIMPLE_REL type
relations.

I've attached a patch that updates the comments to mention this.

David