thswlsqls opened a new pull request, #8643:
URL: https://github.com/apache/paimon/pull/8643
### Purpose
fix #8642
- `HiveTypeUtils.HiveToPaimonTypeVisitor.atomic()` mapped Hive `timestamp`
to `DataTypes.TIMESTAMP_MILLIS()` (precision 3), silently truncating
sub-millisecond values when a Hive schema is inferred into Paimon
(migrate/clone/CREATE via Hive).
- Change it to `DataTypes.TIMESTAMP()` (default precision 6) for parity with
the same-file local-zoned reverse path (`TIMESTAMP_WITH_LOCAL_TIME_ZONE()`,
precision 6) and `SparkTypeUtils.java:436` (`new TimestampType()`, precision 6).
- Existing persisted schemas are unchanged — only newly inferred
migrate/clone/CREATE schemas move from precision 3 to 6.
### Tests
- Added `HiveTypeUtilsTest#testToPaimonTypeTimestampPrecision` asserting
`toPaimonType("timestamp")` equals `DataTypes.TIMESTAMP()` and its precision
equals the local-zoned reverse-path precision.
- `mvn -pl paimon-hive/paimon-hive-common -am clean install` (JDK 11) —
HiveTypeUtilsTest: 2 tests passed.
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