[GitHub] [arrow-rs] alamb commented on issue #587: Can't cast from string to timestamp:

[GitBox <gi...@apache.org>]

alamb commented on issue #587:
URL: https://github.com/apache/arrow-rs/issues/587#issuecomment-893079145


   Thanks @sum12 !  think the trait you want is `ArrowTemporalType` https://docs.rs/arrow/5.1.0/arrow/datatypes/trait.ArrowTemporalType.html
   
   So then you could write a function like:
   
   ```rust
   fn temporal_array_to_string<T>(array: &PrimitiveArray<T>) -> Result<ArrayRef>
   where
       T: ArrowTemporalType,
   {
     //  ... call array.value_as_datetime  here as appropriate
   }
   ```
   
   And then to call it you might do something like:
   ```rust
   let timestamp_array = array.as_any().downcast_ref::<TimestampNanosecondArray>().unwrap();
   temporal_array_to_string(timestamp_array)
   ```
   
   


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