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Posted to github@arrow.apache.org by "Tom-Newton (via GitHub)" <gi...@apache.org> on 2025/01/13 15:35:20 UTC

Re: [I] [C++][Compute] Support casting struct fields to a different order [arrow]

Tom-Newton commented on issue #45028:
URL: https://github.com/apache/arrow/issues/45028#issuecomment-2587451165

   The logic that handles this and https://github.com/apache/arrow/issues/44555 for top level columns is at https://github.com/apache/arrow/blob/6252e9ceeb0f8544c14f79d895a37ac198131f88/cpp/src/arrow/compute/expression.cc#L669. This means that cast actually can't fill with null like I thought when I created https://github.com/apache/arrow/issues/44555. This logic is part of the dataset scanner. 


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