Greg Stark <gsstark(at)mit(dot)edu> writes:
> I would be curious to know how it goes. My own project uses
> denormalized sets stored as arrays as well, though in my case they're
> precalculated from the fully normalized data. I tried to use GiST
> indexes but ran into problems combining the btree-GiST code with array
> GiST code in a multicolumn index. I still don't really know why it
> failed, but after two days building the index I gave up.
Sounds like a bug to me. Could you put together a test case?
regards, tom lane