[jira] [Created] (CALCITE-477) Add example of "better pushdown via RexShuttle API" to CSV adapter

["Vladimir Sitnikov (JIRA)" <ji...@apache.org>]

Vladimir Sitnikov created CALCITE-477:
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             Summary: Add example of "better pushdown via RexShuttle API" to CSV adapter
                 Key: CALCITE-477
                 URL: https://issues.apache.org/jira/browse/CALCITE-477
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 1.0.0-incubating
            Reporter: Vladimir Sitnikov
            Assignee: Julian Hyde


In https://groups.google.com/forum/#!topic/optiq-dev/MrTKe0e8vuQ Bruno suggested roll-your-own {{RexShuttle}} way to identify the required inputs.
The advantage of the approach is it can see through calculations and identify the required columns.

I think it makes sense to include an example of {{InputFinder}}+{{RexInputConverter}} that will show how inputs can be identified out of complex expressions.



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