We appear to have a fair amount of support now for operations like constructing a partitioned index piecemeal, e.g. adding indexes to the partitions one at a time and then attaching them to a parent partitioned index, with the parent ultimately transitioning from "not valid" to "valid" once all the pieces are attached.
However, I cannot find any coherent documentation explaining how to do this (or why you'd want to). Am I just looking in the wrong places? regards, tom lane