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https://issues.apache.org/jira/browse/ARROW-13264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17375909#comment-17375909
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Ben Kietzman commented on ARROW-13264:
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[~lidavidm]
> [C++][Dataset] Enforce single use of Scanner
> --------------------------------------------
>
> Key: ARROW-13264
> URL: https://issues.apache.org/jira/browse/ARROW-13264
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Ben Kietzman
> Priority: Major
>
> Scanner is not guaranteed to be scannable more than once (for example, a
> Scanner which wraps a RecordBatchReader cannot be rewound). However many c++
> unit tests reuse scanners and there aren't clear comments explaining that
> scanners shouldn't be assumed reusable. The simplest solution is to
> explicitly require that all Scanners be single-use
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