> so [block,item] is enough, but global indexes will require [partition,block,item]). That's probably the easier bit, I'd guess that adjusting a lot of the rel

> so [block,item] is enough, but global indexes will require [partition,block,item]). That's probably the easier bit, I'd guess that adjusting a lot of the relevant in-memory structures to share relations, uniqueness checks across relations, adjusting the locking-model to deal with multiple underlying relations etc. is going to be more work.