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https://issues.apache.org/jira/browse/DRILL-7441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arina Ielchiieva updated DRILL-7441:
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Reviewer: Vova Vysotskyi
> Fix issues with fillEmpties, offset vectors
> -------------------------------------------
>
> Key: DRILL-7441
> URL: https://issues.apache.org/jira/browse/DRILL-7441
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
>
> Enable the vector validator with full testing of offset vectors. A number of
> operators trigger errors. Tracking down the issues, and adding detailed
> tests, it turns out that:
> * Drill has an informal standard that zero-length batches should have
> zero-length offset vectors, while a batch of size 1 will have offset vectors
> of size 2. Thus, zero-length is a special case.
> * Nullable, repeated and variable-width vectors have "fill empties" logic
> that is used in two places: when setting the value count and when preparing
> to write a new value. The current logic is not quite right for either case.
> Detailed vector checks fail due to inconsistencies in how the above works.
> This PR fixes those issues.
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