On Thu, May 17, 2018 at 10:29 PM, Robert Haas <robertmh...@gmail.com> wrote:
> Unless the indexing system actually can't reference the first element
> of *pds, and -1 means the second element.  But then I think we need a
> more verbose explanation here.

First element in *pds list (and the array subsequently created from
it) contains the root table's entry.  So, a -1 does mean the 2nd entry
in that list/array.  A 0 in the indexes array always refers to a leaf
partition and hence an index into the array for leaf partitions.


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