liukun4515 commented on issue #9981:
URL: 
https://github.com/apache/arrow-datafusion/issues/9981#issuecomment-2058149468

   > I see -- so the expected behavior is that the timestamp should be read as 
a `Timestamp(TimeUnit::Nanosecond, Some("UTC"))` rather than 
`Timestamp(TimeUnit::Nanosecond, None)`
   
   @alamb thanks for your feedback.
   
   Yes,
   But not only this issue, but also the value of `timezone` and how to use the 
timezone in compute of the arrow-rs/datafusion.
   
   When we read the timestamp column from the parquet using the arrow-parquet 
crate, I will get the column with the data type which will be timestamp(unit, 
None) or timestamp(unit, "UTC"), but we need to use the timestamp with 'UTC-7' 
timezone or other timezone specified by the customer when we do the compute or 
operation on the timestamp column.
   
   I have clarify the issue in the comment/pr 
https://github.com/apache/arrow-rs/pull/5605#issuecomment-2058139684
   
   
   


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