blackary opened a new pull request #10211:
URL: https://github.com/apache/arrow/pull/10211
This surprised me when trying to use this flag to avoid this exception:
```python
df.to_parquet("test.parquet")
*** pyarrow.lib.ArrowInvalid: Casting from timestamp[ns, tz=UTC] to
timestamp[us] would lose data:
1520751599999999999
df.to_parquet("test.parquet", coerce_timestamps='us')
*** pyarrow.lib.ArrowInvalid: Casting from timestamp[ns, tz=UTC] to
timestamp[us] would lose data:
1520751599999999999
df.to_parquet("test.parquet", allow_truncated_timestamps=True)
*** pyarrow.lib.ArrowInvalid: Casting from timestamp[ns, tz=UTC] to
timestamp[us] would lose data:
1520751599999999999
df.to_parquet("test.parquet", coerce_timestamps='us',
allow_truncated_timestamps=True)
# Succeeded without exception
```
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