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What I am doing

What I am doing. Amol Deshpande. Selection Ordering. Given a set of selection predicates and correlations between them, find the optimal ordering : Not known if solvable Relation to eddies Correlated predicates What kinds of probability distributions to learn ?

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What I am doing

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  1. What I am doing Amol Deshpande

  2. Selection Ordering • Given a set of selection predicates and correlations between them, find the optimal ordering : • Not known if solvable • Relation to eddies • Correlated predicates • What kinds of probability distributions to learn ? • Using such learned probability distributions • Extensions to join order optimization

  3. Statistics for Query Optimization • Histograms : • Multidimensional histograms • Using histograms (or other summary statistics) to compute intermediate result sizes optimally • Effect of more accurate statistics on the query plan chosen

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