JingsongLi commented on PR #9866:
URL: https://github.com/apache/paimon/pull/9866#issuecomment-5708357150

   Solid correctness fix. Verified the gate matches the mapper's lossiness 
exactly: the only lossy value mappers are the TIMESTAMP ones going through 
`Timestamp.toMicros()`, and `precision > 6` is precisely where that truncates. 
Precision 6 keeps answering value predicates (the second test pins that), and 
inheriting `REMAIN` for everything except `isNull`/`isNotNull` is the right 
conservative choice — `<>` and `NOT IN` were the dangerous ones because they 
flip the matched rows over the whole row count.
   
   The DE integration test comparing the indexed read with a full scan across 
the predicate shapes is a good safety net, including the guard that 
sub-microsecond values survive the write/read round trip.
   


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