[I] [Variant] Implement `cast_to_variant` kernel [arrow-rs]

["alamb (via GitHub)" <gi...@apache.org>]

alamb opened a new issue, #8043:
URL: https://github.com/apache/arrow-rs/issues/8043

   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
   As @Samyak2  noted on https://github.com/apache/arrow-rs/pull/8021/files#r2249926579, having the ability to convert *FROM* a typed value to a VariantArray will be important 
   
   For example, in SQL it could be used to cast columns to variant like in `some_column::variant`
   
   
   **Describe the solution you'd like**
   
   I would like a kernel like this:
   ```rust
   /// Casts a typed arrow [`Array`] to a [`VariantArray`]. This is useful when you
   /// need to convert a specific data type
   pub fn cast_to_variant(input: &dyn Array) -> Result<VariantArray, ArrowError> {
   ```
   
   **Describe alternatives you've considered**
   
   I started down a templated route (see below) that got somewhat complicated 
   
   **Additional context**
   <!--
   Add any other context or screenshots about the feature request here.
   -->
   


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Re: [I] [Variant] Implement `cast_to_variant` kernel [arrow-rs]

["alamb (via GitHub)" <gi...@apache.org>]

alamb commented on issue #8043:
URL: https://github.com/apache/arrow-rs/issues/8043#issuecomment-3211579806

   `label_issue.py` automatically added labels {'parquet'} from #8044


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Re: [I] [Variant] Implement `cast_to_variant` kernel [arrow-rs]

["alamb (via GitHub)" <gi...@apache.org>]

alamb closed issue #8043: [Variant] Implement `cast_to_variant` kernel
URL: https://github.com/apache/arrow-rs/issues/8043


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