[jira] [Updated] (ARROW-6398) [C++] consolidate ScanOptions and ScanContext

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-6398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-6398:
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    Labels: dataset pull-request-available  (was: dataset)

> [C++] consolidate ScanOptions and ScanContext
> ---------------------------------------------
>
>                 Key: ARROW-6398
>                 URL: https://issues.apache.org/jira/browse/ARROW-6398
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Benjamin Kietzman
>            Assignee: Benjamin Kietzman
>            Priority: Minor
>              Labels: dataset, pull-request-available
>
> Currently ScanOptions has two distinct responsibilities: it contains the data selector (and eventually projection schema) for the current scan and it serves as the base class for format specific scan options.
> In addition, we have ScanContext which holds the memory pool for the current scan.
> I think these classes should be rearranged as follows: ScanOptions will be removed and FileScanOptions will be the abstract base class for format specific scan options. ScanContext will be a concrete struct and contain the data selector, projection schema, a vector of FileScanOptions, and any other shared scan state.



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