[jira] [Work started] (DRILL-35) Implement RunningAggregate Reference Operator

["Timothy Chen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-35?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on DRILL-35 started by Timothy Chen.

> Implement RunningAggregate Reference Operator
> ---------------------------------------------
>
>                 Key: DRILL-35
>                 URL: https://issues.apache.org/jira/browse/DRILL-35
>             Project: Apache Drill
>          Issue Type: New Feature
>            Reporter: Timothy Chen
>            Assignee: Timothy Chen
>              Labels: logical
>
> RunningAggregate (1)
> The running aggregate operator takes an input record and adds appends a set of running aggregations and outputs the resulting record.  The aggregations are re-evaluated on each record within the incoming segment in the order they are provided.  Segment focus can be defined with the ‘within’ value such that aggregations are reset at each segment boundary.
> { @id†: <opref>, op: “runningaggregate”, 
>   input†: <input>, 
>   within*: <name>, 
>   aggregations: [
>     {ref: <name>, expr: <aggexpr> },...
>   ]
> }

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