ZhangHuiGui opened a new issue, #40997: URL: https://github.com/apache/arrow/issues/40997
### Describe the bug, including details regarding any error messages, version, and platform. Recently, we find that the compare internal's avx2 function `NullUpdateColumnToRowImp_avx2` lost the `are_cols_in_encoding_order` check when get `null_bit_id`. It may cause grouper's compare result wrong(are_cols_in_encoding_order = true in grouper). avx2: https://github.com/apache/arrow/blob/36ed0328b43ca39533e58a889f8e091d1f1ca7dc/cpp/src/arrow/compute/row/compare_internal_avx2.cc#L47 non-avx2: https://github.com/apache/arrow/blob/36ed0328b43ca39533e58a889f8e091d1f1ca7dc/cpp/src/arrow/compute/row/compare_internal.cc#L53-L54 ### Component(s) C++ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
