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Posted to dev@arrow.apache.org by "Zhuo Peng (Jira)" <ji...@apache.org> on 2020/06/05 00:05:00 UTC

[jira] [Created] (ARROW-9037) [C++/C-ABI] unable to import array with null count == -1 (which could be exported)

Zhuo Peng created ARROW-9037:
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             Summary: [C++/C-ABI] unable to import array with null count == -1 (which could be exported)
                 Key: ARROW-9037
                 URL: https://issues.apache.org/jira/browse/ARROW-9037
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 0.17.1
            Reporter: Zhuo Peng


If an Array is created with null_count == -1 but without any null (and thus no null bitmap buffer), then ArrayData.null_count will remain -1 when exporting if null_count is never computed. The exported C struct also has null_count == -1 [1]. But when importing, if null_count != 0, an error [2] will be raised.

[1] https://github.com/apache/arrow/blob/5389008df0267ba8d57edb7d6bb6ec0bfa10ff9a/cpp/src/arrow/c/bridge.cc#L560

[2] https://github.com/apache/arrow/blob/5389008df0267ba8d57edb7d6bb6ec0bfa10ff9a/cpp/src/arrow/c/bridge.cc#L1404

 



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