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https://issues.apache.org/jira/browse/ARROW-15846?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou reassigned ARROW-15846:
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Assignee: Antoine Pitrou
> [Format] Clarify presence of Struct array validity bitmap
> ---------------------------------------------------------
>
> Key: ARROW-15846
> URL: https://issues.apache.org/jira/browse/ARROW-15846
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Format
> Reporter: Antoine Pitrou
> Assignee: Antoine Pitrou
> Priority: Major
> Fix For: 8.0.0
>
>
> The following wording in the format spec is a bit ambiguous:
> bq. A struct array must still have an allocated validity bitmap, if it has
> one or more null values.
> https://arrow.apache.org/docs/format/Columnar.html#struct-layout
> This can be misinterpreted as meaning that a struct array with no nulls does
> not have any buffer at all. In reality, it has an "absent" validity buffer
> (e.g. with 0 length).
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