rok commented on issue #37192:
URL: https://github.com/apache/arrow/issues/37192#issuecomment-1680331785
Thanks for reporting this!
Could you say more about your intended use of this? If you're looking to get
number of units since epoch you could just run:
```python
import pyarrow as pa
arr = pa.array([0, 10E17], pa.timestamp("ns"))
arr.cast(pa.int64())
<pyarrow.lib.Int64Array object at 0x7fea336b9ea0>
[
0,
1000000000000000000
]
```
If you're looking to round your time to multiples of units I'd suggest
looking at temporal rounding functions:
```python
import pyarrow.compute as pc
pc.floor_temporal(arr, multiple=1, unit="second")
<pyarrow.lib.TimestampArray object at 0x7fea33be2740>
[
1970-01-01 00:00:00.000000000,
2001-09-09 01:46:40.000000000
]
```
More here: https://arrow.apache.org/docs/cpp/compute.html#conversions
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