andygrove commented on PR #627:
URL: https://github.com/apache/datafusion-comet/pull/627#issuecomment-2209210317
Thanks @vaibhawvipul. This is looking good. There is also this section in
`cast.rs`:
```rust
fn cast_array(&self, array: ArrayRef) -> DataFusionResult<ArrayRef> {
let to_type = &self.data_type;
let array = array_with_timezone(array, self.timezone.clone(),
Some(to_type))?;
let from_type = array.data_type().clone();
// unpack dictionary string arrays first
// TODO: we are unpacking a dictionary-encoded array and then
performing
// the cast. We could potentially improve performance here by
casting the
// dictionary values directly without unpacking the array first,
although this
// would add more complexity to the code
```
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