GitHub user jianqiao opened a pull request:

    Improve disjunctive predicate pushdown to optimize more scenarios

    This PR improves the `PushDownLowCostDisjunctivePredicate` optimization to 
consider more applicable scenarios -- precisely it will push down the partial 
predicate when it has a low selectivity. This results in 4X speedup for TPC-H 

You can merge this pull request into a Git repository by running:

    $ git pull improve-pushdown

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    This closes #246
commit ed72e2477033438e922195aa2632003ab037ab7b
Author: Jianqiao Zhu <>
Date:   2017-05-03T04:55:52Z

    Improve disjunctive predicate pushdown to optimize more scenarios.


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