LiaCastaneda commented on PR #7627:
URL: https://github.com/apache/arrow-rs/pull/7627#issuecomment-3160365818
I'm sketching a solution for this, and I'm wondering if we want to keep the
exact same encoding, one thing that I think we could do is manually build a
Dictionary using a DictionaryBuilder or perform a cast using `arrow_cast::cast`
which does [the
same](https://github.com/apache/arrow-rs/blob/c25c5a74c1c70cee57558e81a66a2e44725a67a6/arrow-cast/src/cast/dictionary.rs#L323)
under the hood. This would keep the DataType but i'm not sure it will keep the
exact same encoding as the Dict Array that went in. If we want to keep the
exact same Dict encoding then we would probably need to keep the original
`DictionaryArray` values somewhere
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