OIiveirra opened a new pull request, #67834:
URL: https://github.com/apache/doris/pull/67834
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: Loading Parquet timestamps before the Unix epoch with
fractional seconds could produce a negative subsecond component. Its conversion
to an unsigned value then corrupted the timestamp, yielding NULL or a 1970
value. Normalize the quotient and remainder with floor semantics before
constructing the timestamp.
### Release note
Fix loading pre-epoch Parquet timestamps that contain fractional seconds.
### Check List (For Author)
- Test: Unit Test / Regression test
- Ran 4 focused Parquet timestamp conversion BE unit tests
- Ran test_outfile_parquet regression suite against a local FE/BE
cluster, including exact values for five pre-epoch timestamps
- Behavior changed: Yes (pre-epoch Parquet timestamps with fractional
seconds are decoded correctly)
- Does this need documentation: No
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