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Support for ns #1188

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Support for ns #1188

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ffdbc3e
added support for ns in primitie function and added the abilty to dow…
zaryab-ali Sep 20, 2024
5c3483b
added support for ns in primitie function, also added the abilty to d…
zaryab-ali Sep 20, 2024
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11 changes: 10 additions & 1 deletion pyiceberg/io/pyarrow.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1068,8 +1068,17 @@ def primitive(self, primitive: pa.DataType) -> PrimitiveType:
return StringType()
elif pa.types.is_date32(primitive):
return DateType()
elif isinstance(primitive, pa.Time64Type) and primitive.unit == "us":
elif isinstance(primitive, pa.Time64Type) and (primitive.unit == "us" or primitive.unit == "ns"):
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i think we can get rid fo the us/ns check here, since Time64Type only supports those 2 https://arrow.apache.org/docs/python/generated/pyarrow.Time64Type.html

primitive = cast(pa.TimestampType, primitive)
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Time64Type and TimestampType and different, dont need to cast here

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https://github.com/zaryab-ali/iceberg-python/blob/5c3483b25d8655067930bb8ffe938a6296c6ead6/pyiceberg/types.py#L656

if primitive.unit == "ns":
if self._downcast_ns_timestamp_to_us:
logger.warning("Iceberg does not yet support 'ns' timestamp precision. Downcasting to 'us'.")
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lets add a test to verify that when _downcast_ns_timestamp_to_us is True, the downcasting happens

else:
raise TypeError(
"Iceberg does not yet support 'ns' timestamp precision. Use 'downcast-ns-timestamp-to-us-on-write' configuration property to automatically downcast 'ns' to 'us' on write."
)
return TimeType()

elif pa.types.is_timestamp(primitive):
primitive = cast(pa.TimestampType, primitive)
if primitive.unit in ("s", "ms", "us"):
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