[jira] [Created] (ARROW-13166) Java Dataset API ScanOptions expansion

["Sebastiaan Alvarez Rodriguez (Jira)" <ji...@apache.org>]

Sebastiaan Alvarez Rodriguez created ARROW-13166:
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             Summary: Java Dataset API ScanOptions expansion
                 Key: ARROW-13166
                 URL: https://issues.apache.org/jira/browse/ARROW-13166
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Java
            Reporter: Sebastiaan Alvarez Rodriguez


Currently, there are very few scanning options which we can set in the Java Dataset API [1].

Additionally, the options that exist now always must be set from Java, without the possibility to use sensible default values from core Arrow.

For my use-case, I want to be able to set the `fragment_readahead` option from the Java-side.

 

It would be great if:
 + `ScanOptions.java` would be expanded to allow us to set more, potentially all options related to scanner creation.
 + Java users can omit options to use the default values, e.g. [2].

It would be good to know what others think, and whether a PR for this is useful.


[1][https://github.com/apache/arrow/blob/master/java/dataset/src/main/java/org/apache/arrow/dataset/scanner/ScanOptions.java]
[2][https://github.com/apache/arrow/blob/ad5dc8207192abe71d3e88303252629041968508/cpp/src/arrow/dataset/scanner.h#L51-L53]



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