Gabriel39 commented on PR #67784:
URL: https://github.com/apache/doris/pull/67784#issuecomment-5692152643

   Fixed and validated the timestamp conversion follow-up in d006f9d21d:
   
   - MySQL now aligns execution sessions and explicit timestamp Calendars to 
UTC for both reads and writes. Real-driver tests reproduced the eight-hour 
shift before the fix. Remote session-sensitive expressions now run in UTC; 
DATETIME column reads retain wall-clock values.
   - ClickHouse scalar timestamps now use the same epoch-microsecond projection 
as nested timestamps, including Query TVFs. A real JDBC v1 test exposed the 
loss of the second instant in a DST overlap; v1/v2 now pass.
   - SQL Server legacy drivers use their offset-preserving Timestamp fallback 
when OffsetDateTime is unsupported, with a single capability probe per executor.
   
   Validation: 213 focused FE/JNI/integration tests passed with no failures or 
skips; packaging and FE Checkstyle passed. Updated Doris packages passed 37 
end-to-end assertions across UTC, Asia/Shanghai and America/New_York against 
MySQL, ClickHouse v1/v2 and SQL Server. Hudi/MaxCompute carrier and Arrow 
coverage passed; no live Hudi/MaxCompute environment was available, so their 
service-level validation is not claimed. No native storage code was changed. 
Full CI is pending.


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