Greedy List Intersection

@article{Krauthgamer2008GreedyLI,
  title={Greedy List Intersection},
  author={Robert Krauthgamer and Aranyak Mehta and Vijayshankar Raman and Atri Rudra},
  journal={2008 IEEE 24th International Conference on Data Engineering},
  year={2008},
  pages={1033-1042}
}
A common technique for processing conjunctive queries is to first match each predicate separately using an index lookup, and then compute the intersection of the resulting row- id lists, via an AND-tree. The performance of this technique depends crucially on the order of lists in this tree: it is important to compute early the intersections that will produce small results. But this optimization is hard to do when the data or predicates have correlation. We present a new algorithm for ordering… CONTINUE READING

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