title: optimizing disjunctive queries with expensive predicates alfons kemper , guido moerkotte , michael steinbrunn , klaus peithner sigmod conference 1994. authors: nan. venue: nan. year: nan
title: minimal probing : supporting expensive predicates for top-k queries kevin chen-chuan chang , seung-won hwang international conference on management of data 2002. authors: nan. venue: nan. year: nan