Re: Partitioned tables and covering indexes

That's the idea that I tried to express. The point is that we need to
tell the user that there is no need to worry about it, rather than
that they're wrong to ask about it. Though we should probably actually
just throw an error.

Or maybe it should be the collation of the underlying table columns.
Otherwise the collation returned by an index-only scan would be
different from a table scan, no?

+1, dangerous