Re: BUG #4350: 'select' acess given to views containing "union all" even though user has no grants

"Heikki Linnakangas" <heikki@enterprisedb.com> writes:
> We should use range_table_walker, which knows how to descend into all
> kinds of RTEs...

Yeah, I had been thinking of that but didn't see an easy way to apply
it; of course the answer is to use IncrementVarSublevelsUp_walker
directly as you have here.

Looks good except IncrementVarSublevelsUp_rtable really ought to have
a comment.  Please fix that, commit, and backpatch as needed.

            regards, tom lane