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https://issues.apache.org/jira/browse/ARROW-11928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou reassigned ARROW-11928:
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Assignee: Antoine Pitrou (was: Ben Kietzman)
> [C++][Compute] Add ExecNode hierarchy
> -------------------------------------
>
> Key: ARROW-11928
> URL: https://issues.apache.org/jira/browse/ARROW-11928
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 3.0.0
> Reporter: Ben Kietzman
> Assignee: Antoine Pitrou
> Priority: Major
> Fix For: 4.0.0
>
>
> Per discussion on
> https://docs.google.com/document/d/1AyTdLU-RxA-Gsb9EsYnrQrmqPMOYMfPlWwxRi1Is1tQ
> Add an ExecNode interface with which a streaming execution graph can be
> constructed. Initial concrete classes will include:
> - ScanNode, which wraps a dataset and is a pure emitter of batches
> (initially, this will only wrap memory sized datasets such as tables. See
> ARROW-11930)
> - FilterNode, which evaluates an expression on inputs and based on the result
> removes rows from batches (eventually, this may defer materialization of the
> selection to other kernels. See ARROW-5005 ARROW-10474)
> - ProjectNode, which evaluates expressions on inputs producing new columns.
> - GroupedAggregateNode, which computes aggregations grouped on one or more
> keys.
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