Weston Pace created ARROW-15522:
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Summary: [C++] Investigate reporting filter selectivity for filter
order optimization
Key: ARROW-15522
URL: https://issues.apache.org/jira/browse/ARROW-15522
Project: Apache Arrow
Issue Type: Sub-task
Components: C++
Reporter: Weston Pace
If we have highly selective filters we can reduce the total amount of work we
need to do if we run those filters first. For example, in TPC-H query 6 we are
either casting decimals to doubles and running comparisons or we are performing
somewhat costly double comparisons. At the same time we have a highly
selective date filter. If we can evaluate that date filter first then we can
reduce the amount of decimal arithmetic we need to do.
It's a little unclear to me at the moment how much of this is something we want
to back into the execution engine versus how much of this should be getting
provided to us by some kind of intelligent runtime optimizing planner.
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