[jira] [Created] (DRILL-5285) Provide detailed, accurate estimate of size consumed by a record batch

["Paul Rogers (JIRA)" <ji...@apache.org>]

Paul Rogers created DRILL-5285:
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             Summary: Provide detailed, accurate estimate of size consumed by a record batch
                 Key: DRILL-5285
                 URL: https://issues.apache.org/jira/browse/DRILL-5285
             Project: Apache Drill
          Issue Type: Sub-task
    Affects Versions: 1.10.0
            Reporter: Paul Rogers
            Assignee: Paul Rogers
             Fix For: 1.10.0


DRILL-5080 introduced a {{RecordBatchSizer}} that estimates the space taken by a record batch and determines batch "density."

Drill provides a large variety of vectors, each with their own internal structure and collections of vectors. For example, fixed vectors use just a data vector. Nullable vectors add an "is set" vector. Variable length vectors add an offset vector. Repeated vectors add a second offset vector.

The original {{RecordBatchSizer}} attempted to compute sizes for all these vector types. But, the complexity got to be out of hand. This ticket requests to simply bite the bullet and move the calculations into each vector type so that the {{RecordBatchSizer}} can simply use the results of the calculations.



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