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https://issues.apache.org/jira/browse/CALCITE-477?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14222160#comment-14222160
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Julian Hyde commented on CALCITE-477:
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Agreed.
I also think that each change to the demo, such as this, should be accompanied
by changes to the tutorial.
> 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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