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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/15 20:18:33 UTC

[GitHub] [arrow-rs] WinkerDu commented on issue #684: Allow casting from `DataType::Null` to any other type

WinkerDu commented on issue #684:
URL: https://github.com/apache/arrow-rs/issues/684#issuecomment-1100374553

   > The cast kernels are here: https://github.com/apache/arrow-rs/blob/master/arrow/src/compute/kernels/cast.rs
   > 
   > To support casting requires:
   > 
   > 1. add entry to `can_cast_types`
   > 2. Add actual cast code to `cast_with_options`
   > 3. Add relevant tests
   
   @alamb here is a rough fix #1572 , plz have a review, thank you.


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