DanielLeens commented on PR #12592:
URL: https://github.com/apache/seatunnel/pull/12592#issuecomment-6397053332

   Thanks both. Two quick confirmations for @SEZ9's open questions, checked 
against `cb6ae01c0` (code reading only, nothing executed locally):
   
   - **F1:** `DuckDBTypeConverter.reconvertTimestampType` 
(`DuckDBTypeConverter.java:349`) uses the declared scale, clamps values above 
the maximum to `TIMESTAMP_NS` with a WARN, and a null/negative scale falls back 
to plain `TIMESTAMP`. So the DuckDB-to-DuckDB `TIMESTAMP_NS` round trip is 
implemented, not a deferred limitation, and it is pinned by the two 
`testReconvertTimestamp*` cases that @hutiefang76 named.
   - **CI:** the required `Build` check on this head is `success` 
(https://github.com/apache/seatunnel/runs/119994188490), and the `Notify test 
workflow` check is green as well, so there is nothing left to independently 
verify on that side.
   
   @hutiefang76's answers on F3/F8 and F5/F7 match my earlier review: the 
one-time WARN plus the Javadoc on metadata-based detection are in place, and 
the `Calendar` allocation hoisting stays a non-blocking follow-up. My 
conclusion is unchanged: no source-side blocker, ready for committer review.


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