Inline agg

This is part 1: Serial Inline aggregation contain table agg and group by agg with index.

Waiting for Jenkins.

This piece of code was copied from PlanAssember that was executing per access plan without any reason that needs to. So I moved them into query parse part and reuse the information when needed.

I do not understand your concern here and we may need to talk about the problem in person. Anyway, Would you create a new separate ticket to improve or fix LIMIT expression and move on LIMIT related from that? As this change set does not make it worse, but not as better as you think if I understand correctly.