jdockerty opened a new pull request, #710:
URL: https://github.com/apache/iceberg-rust/pull/710

   Closes https://github.com/apache/iceberg-rust/issues/709
   
   Nanosecond precision can be written by `parquet-rs` and [`iceberg-rust` has 
some support for this 
recently](https://github.com/apache/iceberg-rust/pull/542) too.
   
   The `DataType::Timestamp` itself is caught by the Arrow's own 
[`is_temporal`](https://github.com/apache/arrow-rs/blob/853626ef519bd68bfd604bf6d136f8677bedb1eb/arrow-schema/src/datatype.rs#L497-L505)
 function usage within the 
[`is_primitive`](https://github.com/apache/iceberg-rust/blob/697a20060f2247da87f73073e8bf5ab407bd40ea/crates/iceberg/src/arrow/schema.rs#L116)
 usage for Iceberg - this is why I haven't expanded the `match` arm.
   


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