jackylee-ch opened a new pull request, #18001:
URL: https://github.com/apache/iceberg/pull/18001
The nano-of-millisecond argument in `StructRowData.convertValue` is
`floorMod(timeMillis * 1000, 1000) * 1000`, always 0 since `timeMillis` is
already millis. A `timestamp` in an array or map loses sub-millisecond
precision: `12:00:00.123456` reads back as `12:00:00.123`. Normalized to micros
first, like `TIMESTAMP_NANO` below it.
### Testing
`iceberg-flink-{1.20,2.1,2.2,2.3}:test --tests TestStructRowData`
---
**AI Disclosure**
- Model: Claude Opus 5
- Platform/Tool: Ducc
- Human Oversight: fully reviewed
- Prompt Summary: Fix microsecond truncation for nested timestamps.
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