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https://issues.apache.org/jira/browse/DRILL-13?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13605281#comment-13605281
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Jacques Nadeau commented on DRILL-13:
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I think we need to keep the concepts a bit more abstract. I've been struggling
with the capabilities interface when you mentioned partial aggregation. After
thinking about it further, I think we need to stay in the logical realm.
However, we should have a scope capability to the capabilities. For example, a
group-by logical capability could be by partition or global scope. As far as
bloom filters go, can you share a possible optimization that you think would be
valuable that couldn't be revealed as a higher level capability?
> Storage Engine: Define Java Interface
> -------------------------------------
>
> Key: DRILL-13
> URL: https://issues.apache.org/jira/browse/DRILL-13
> Project: Apache Drill
> Issue Type: Task
> Reporter: Jacques Nadeau
> Assignee: Jacques Nadeau
>
> We're going to need to define a storage engine API. At a minimum, we'll need
> to generate a Java one. We will probably need to also create a CPP one.
> This task is for the former. Things that are likely to be included in a the
> Java interface are: reader (scanner), writer, capabilities interface, schema
> interface, statistics interface, data layout and ordering
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