andygrove commented on a change in pull request #8794:
URL: https://github.com/apache/arrow/pull/8794#discussion_r532996931
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File path: rust/arrow/src/compute/kernels/cast.rs
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@@ -376,6 +378,27 @@ pub fn cast(array: &ArrayRef, to_type: &DataType) ->
Result<ArrayRef> {
Int64 => cast_string_to_numeric::<Int64Type>(array),
Float32 => cast_string_to_numeric::<Float32Type>(array),
Float64 => cast_string_to_numeric::<Float64Type>(array),
+ Date32(DateUnit::Day) => {
+ use chrono::{NaiveDate, NaiveTime};
+ let zero_time = NaiveTime::from_hms(0, 0, 0);
+ let string_array =
array.as_any().downcast_ref::<StringArray>().unwrap();
Review comment:
It would be nice to use `expect` rather than `unwrap` here so that we
can provide an error message e.g. `.expect("failed to downcast to string in
CAST from String to Date")`
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