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Posted to dev@arrow.apache.org by "Martin (JIRA)" <ji...@apache.org> on 2019/07/22 21:09:00 UTC

[jira] [Created] (ARROW-6005) arrow::FileReader::GetRecordBatchReader() does not behave as documented since ARROW-1012

Martin created ARROW-6005:
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             Summary: arrow::FileReader::GetRecordBatchReader() does not behave as documented since ARROW-1012
                 Key: ARROW-6005
                 URL: https://issues.apache.org/jira/browse/ARROW-6005
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 0.14.1, 0.14.0
            Reporter: Martin


GetRecordBatchReader() should

"Return a RecordBatchReader of row groups selected from row_group_indices, the
ordering in row_group_indices matters." (that is what the doxygen string says),

*but:*

Since change ARROW-1012, it ignores the {{row_group_indices}} argument.

The {{row_group_indices_}} in the {{RowGroupRecordBatchReader}} that is created are never used.

Either the documentation should be changed, or the behavior should be reverted.  I would prefer the latter, as I do not know how to make sure to read a specific row groups anymore...



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