GitHub user jianqiao opened a pull request:
https://github.com/apache/incubator-quickstep/pull/246
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
Q19.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/incubator-quickstep improve-pushdown
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-quickstep/pull/246.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #246
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commit ed72e2477033438e922195aa2632003ab037ab7b
Author: Jianqiao Zhu <[email protected]>
Date: 2017-05-03T04:55:52Z
Improve disjunctive predicate pushdown to optimize more scenarios.
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