[PR] feat(variant): add DataType::Null support to cast_to_variant [arrow-rs]

Mon, 11 Aug 2025 11:16:03 -0700 


feniljain opened a new pull request, #8107:
URL: https://github.com/apache/arrow-rs/pull/8107

   # Which issue does this PR close?
   
   - Closes #8053 
   
   # Are these changes tested?
   
   Yes
   
   # Notes
   
   From this comment:
   ```
   /// # Notes
   /// If the input array element is null, the corresponding element in the
   /// output `VariantArray` will also be null (not `Variant::Null`).
   ```
   
   I think we need to make a variant array of nulls, do correct me if I am 
wrong here, and a `Variant::Null` needs to be returned 😅


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