Timothy Chen created DRILL-35:
---------------------------------
Summary: Implement RunningAggregate Reference Operator
Key: DRILL-35
URL: https://issues.apache.org/jira/browse/DRILL-35
Project: Apache Drill
Issue Type: Bug
Reporter: Timothy Chen
Assignee: Timothy Chen
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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