[jira] [Created] (ARROW-17029) [Docs][C++] Guide to to work with RLE data (in kernels?)

["Tobias Zagorni (Jira)" <ji...@apache.org>]

Tobias Zagorni created ARROW-17029:
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             Summary: [Docs][C++] Guide to to work with RLE data (in kernels?)
                 Key: ARROW-17029
                 URL: https://issues.apache.org/jira/browse/ARROW-17029
             Project: Apache Arrow
          Issue Type: Sub-task
          Components: C++, Documentation
            Reporter: Tobias Zagorni


Topics I can think of right now: * introducing some utility functions for working with RLE data that I'm collecting currently as rle_util.h on my filter branch
 * how physical/logical indices work, especially in combination with arrow offsets
 * how common kinds of kernels can be converted to RLE. E.g scalar kernels with a single input could automatically be run on the internal data array of RLE. Scalar with multiple inputs and some kinds of vector algorithms should use VisitMergedRuns...



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