added NullTupleReferenceFactory for representing infinity bounds in a range predicate

git-svn-id: https://hyracks.googlecode.com/svn/trunk@120 123451ca-8445-de46-9d55-352943316053
1 file changed
tree: 51e387eabb074246fa80b22bc9db10795f58b1c3
  1. hyracks/