adriangb commented on PR #25163:
URL: https://github.com/apache/datafusion/pull/25163#issuecomment-5625321869

   Heads-up on a merge-order interaction: 
https://github.com/apache/datafusion/pull/25175 (timezone characterization 
tests) currently pins the *current* behaviour of these fields as errors —
   
   ```
   query error DataFusion error: Execution error: Date part 'timezone_hour' not 
supported
   SELECT date_part('timezone_hour', ts) FROM day_denver
   ```
   
   — in `datafusion/sqllogictest/test_files/datetime/timestamps_timezone.slt`, 
Section 9, along with a comment saying there is no way to ask a timezone-aware 
value for its own offset.
   
   Once this PR lands, those two `query error` blocks become value queries 
(`-6` and `0` for every `day_denver` row) and that comment is no longer true. 
Whichever of the two merges second needs to update the other; nothing is broken 
by merging in either order. Noting it here so it is not a surprise.
   


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