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https://issues.apache.org/jira/browse/CALCITE-4744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mihai Budiu reassigned CALCITE-4744:
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Assignee: (was: Mihai Budiu)
> Defer windowed aggregation function expansion to the planning step
> -------------------------------------------------------------------
>
> Key: CALCITE-4744
> URL: https://issues.apache.org/jira/browse/CALCITE-4744
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Reporter: keaton drebes
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> I have a project that is working with windowed functions and we want to avoid
> the expansion of certain aggregate functions (i.e. stddev) in the process of
> converting from an SqlNode to a RelNode. We have currently supported this by
> copying the entire StandardConvertlet table, and removing the convertlets
> responsible for this.
> It seems the correct way to resolve this issue is to defer the expansion of
> aggregate functions until the planning step, then add a planner rule to
> enable/disable it.
>
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