fixes

Signed-off-by: Robert Kruszewski <[email protected]>

Author: robert3005

vortex-duckdb/src/convert/vector.rs

@@ -108,7 +108,7 @@ pub fn flat_vector_to_vortex(vector: &mut Vector, len: usize) -> VortexResult<Ar
             )
             .into_array();
             Ok(
-                TemporalArray::new_timestamp(arr, TimeUnit::Nanoseconds, Some("UTC".to_string()))
+                TemporalArray::new_timestamp(arr, TimeUnit::Microseconds, Some("UTC".to_string()))
                     .into_array(),
             )
         }

vortex-duckdb/src/duckdb/vector.rs

@@ -381,7 +381,6 @@ mod tests {
 
         let validity = vector.validity_ref(len);
         let validity = validity.to_validity();
-        assert_eq!(validity.maybe_len(), Some(1));
         assert!(validity.is_null(0));
     }
 
@@ -398,7 +397,6 @@ mod tests {
 
         let validity = vector.validity_ref(len);
         let validity = validity.to_validity();
-        assert_eq!(validity.maybe_len(), Some(1));
         assert!(validity.is_valid(0));
     }
 
@@ -431,7 +429,6 @@ mod tests {
 
         let validity = vector.validity_ref(len);
         let validity = validity.to_validity();
-        assert_eq!(validity.maybe_len(), Some(len));
         // Check that all positions are null
         assert_eq!(validity, Validity::AllInvalid);
     }