> I think one way of attacking the problem would be using the existing
> nbtree by allowing it to store the five btrees. First read the README
> in the nbtree dir, and then poke at the metapage's only structure. You
> will see that it has a BlockNumber to the root page of the index. Try
> modifying that to make it have a BlockNumber to every index's root page.
> You will have to provide ways to access each root page and maybe other
> nonstandard things (such as telling the root split operation what root
> page are you going to split), but you will get recovery and concurrency
> (at least to a point) for free.
Why not write it using the GiST interface - that is after all the entire
point of GiST...
Chris
