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Posted to dev@arrow.apache.org by "Ji Liu (Jira)" <ji...@apache.org> on 2020/01/10 04:23:00 UTC

[jira] [Created] (ARROW-7539) [Java] FieldVector getFieldBuffers API should not set reader/writer indices

Ji Liu created ARROW-7539:
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             Summary: [Java] FieldVector getFieldBuffers API should not set reader/writer indices
                 Key: ARROW-7539
                 URL: https://issues.apache.org/jira/browse/ARROW-7539
             Project: Apache Arrow
          Issue Type: Bug
          Components: Java
            Reporter: Ji Liu
            Assignee: Ji Liu


Per discussion [https://github.com/apache/arrow/pull/6133#discussion_r364906302].

The fact that we have reader/writer settings in {{getFieldBuffers}} is wrong. To clarify, {{getFieldBuffers}} is distinct from {{getBuffers}}. The former should be for getting access to underlying data for higher-performance algorithms. The latter is for sending the data over the wire. Seems we've mixed up use of both.

 

Currently in {{VectorUnloader}}, we used {{getFieldBuffers}} to create {{ArrowRecordBatch}} that’s why we keep writer/reader indices in {{getFieldBuffers}}, we should use {{getBuffers}} instead.



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