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Posted to jira@arrow.apache.org by "Ben Kietzman (Jira)" <ji...@apache.org> on 2021/03/10 22:34:00 UTC

[jira] [Created] (ARROW-11928) [C++][Compute] Add ExecNode hierarchy

Ben Kietzman created ARROW-11928:
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             Summary: [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: Ben Kietzman
             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.
- 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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