[jira] [Commented] (ARROW-17705) [Java][Dataset][Adapter/ORC] Compare features for ORC reader between Dataset and Adapter/ORC

["David Dali Susanibar Arce (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-17705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17605446#comment-17605446 ] 

David Dali Susanibar Arce commented on ARROW-17705:
---------------------------------------------------

The Adapter/ORC and Dataset ORC handling different level of abstractions:
 * The Adapter/ORC: Adapter this moment is a specialized reader for single ORC files
 * The Dataset ORC: Dataset is a more generic implementation for reader ORC files, and also support reading multiple files

Then this two modules are already needed and need to continue working for improvements.

Also, https://issues.apache.org/jira/browse/ARROW-17561 is needed

[~kou] 

> [Java][Dataset][Adapter/ORC] Compare features for ORC reader between Dataset and Adapter/ORC 
> ---------------------------------------------------------------------------------------------
>
>                 Key: ARROW-17705
>                 URL: https://issues.apache.org/jira/browse/ARROW-17705
>             Project: Apache Arrow
>          Issue Type: Sub-task
>            Reporter: David Dali Susanibar Arce
>            Assignee: David Dali Susanibar Arce
>            Priority: Major
>
> Compare new Dataset ORC reader versus Adapter ORC reader:
> Dataset ORC: High level interface to a dataset abstraction
> {code:java}
> FileSystemDatasetFactory(rootAllocator(), NativeMemoryPool.getDefault(),FileFormat.ORC, orcDatasetUri) {code}
>  
> Adapter ORC: Direct bindings to the file reader 
> {code:java}
> new OrcReader(testFile.getAbsolutePath(), allocator); {code}
>  
>  



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