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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2018/02/06 19:43:00 UTC

[jira] [Commented] (CALCITE-2170) Use Druid Expressions capabilities to improve the amount of work that can be pushed to Druid

    [ https://issues.apache.org/jira/browse/CALCITE-2170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16354449#comment-16354449 ] 

Julian Hyde commented on CALCITE-2170:
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For some time we have needed a general facility that can look at an expression (generally in a project or filter, but not necessarily) and split off the sub-expressions that can be pushed down. We are encountering the same issue with Jethro. It would be great if this task could contribute to that general facility. The beginnings are in the CalcRelSplitter class.

> Use Druid Expressions capabilities to improve the amount of work that can be pushed to Druid
> --------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-2170
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2170
>             Project: Calcite
>          Issue Type: New Feature
>          Components: druid
>            Reporter: slim bouguerra
>            Assignee: slim bouguerra
>            Priority: Major
>
> Druid 0.11 has newly built in capabilities called Expressions that can be used to push expression like projects/aggregates/filters. 
> In order to leverage this new feature, some changes need to be done to the Druid Calcite adapter. 
>  
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