On 2018-Jul-16, David Rowley wrote: > On 16 July 2018 at 12:55, David Rowley <david.row...@2ndquadrant.com> wrote: > > Thinking about this some more, I don't quite see any reason that the > > partitioned_rels for a single hierarchy couldn't just be a Bitmapset > > instead of an IntList. > > Of course, this is not possible since we can't pass a List of > Bitmapsets to the executor due to Bitmapset not being a node type.
Maybe we can just add a new node type that wraps a lone bitmapset. The naive implementation (just print out individual members) should be pretty straightforward; a more sophisticated one (print out the "words") may end up more compact or not depending on density, but much harder for debugging, and probably means a catversion bump when BITS_PER_BITMAPWORD is changed, so probably not a great idea anyway. I suppose the only reason we haven't done this yet is nobody has needed it. Sounds like its time has come. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services