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Posted to issues@arrow.apache.org by "mroeschke (via GitHub)" <gi...@apache.org> on 2023/04/05 21:53:16 UTC

[GitHub] [arrow] mroeschke opened a new issue, #34913: [BUG]: pyarrow.compute.mean overflowing when numeric sum exceeds int64 max

mroeschke opened a new issue, #34913:
URL: https://github.com/apache/arrow/issues/34913

   ### Describe the bug, including details regarding any error messages, version, and platform.
   
   ```
   In [15]: import numpy as np; import pyarrow as pa
   
   In [16]: pa.compute.mean(pa.array([np.iinfo(np.int64).max, 1]))
   Out[16]: <pyarrow.DoubleScalar: -4.611686018427388e+18>
   
   In [17]: pa.__version__
   Out[17]: '11.0.0'
   ```
   
   Haven't checked, but I suspect if mean is calculated as `sum(values) / len(values)`, `sum(values)` might be overflowing before performing the divisor.
   
   ### Component(s)
   
   Python


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[GitHub] [arrow] assignUser commented on issue #34913: [Python]: pyarrow.compute.mean overflowing when numeric sum exceeds int64 max

Posted by "assignUser (via GitHub)" <gi...@apache.org>.

assignUser commented on issue #34913:
URL: https://github.com/apache/arrow/issues/34913#issuecomment-1498207232

   Thanks for the very clear reprex! 
   
   I am going to close this though as it is a duplicate of #34909


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[GitHub] [arrow] mroeschke commented on issue #34913: [Python]: pyarrow.compute.mean overflowing when numeric sum exceeds int64 max

Posted by "mroeschke (via GitHub)" <gi...@apache.org>.

mroeschke commented on issue #34913:
URL: https://github.com/apache/arrow/issues/34913#issuecomment-1498208490

   Thanks! Sorry for not searching the issue tracker first


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[GitHub] [arrow] assignUser closed issue #34913: [Python]: pyarrow.compute.mean overflowing when numeric sum exceeds int64 max

Posted by "assignUser (via GitHub)" <gi...@apache.org>.

assignUser closed issue #34913: [Python]: pyarrow.compute.mean overflowing when numeric sum exceeds int64 max
URL: https://github.com/apache/arrow/issues/34913


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