On Fri, 30 Nov 2018 at 20:15, Kato, Sho <kato-...@jp.fujitsu.com> wrote: > Will we improve creating the generic plan in the future?
I think Amit's patch will improve the UPDATE/DELETE planning performance even when nothing can be pruned. Currently planning those are quite inefficient as a separate grouping planner call is made for each partition. > For example, if there is UPDATE / DELETE run-time partition pruning, creating > the generic plan will also be faster. Adding run-time pruning code for that won't make the planner any faster. There will be a very slight overhead to build the required PartitionPruneInfo struct to attach to the plan in order to allow the run-time pruning to work. This would mean that there'd only be a hope of reducing the execution time of such a plan, not the time to build the plan in the first place. -- David Rowley http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
