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  1. Apache Arrow
  2. ARROW-11928

[C++][Compute] Add ExecNode hierarchy

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 3.0.0
    • 5.0.0
    • C++

    Description

      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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              bkietz Ben Kietzman
              bkietz Ben Kietzman
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