rdblue commented on code in PR #7831:
URL: https://github.com/apache/iceberg/pull/7831#discussion_r1285257779
##########
python/pyiceberg/io/pyarrow.py:
##########
@@ -1025,3 +1039,335 @@ def map_key_partner(self, partner_map:
Optional[pa.Array]) -> Optional[pa.Array]
def map_value_partner(self, partner_map: Optional[pa.Array]) ->
Optional[pa.Array]:
return partner_map.items if isinstance(partner_map, pa.MapArray) else
None
+
+
+_PRIMITIVE_TO_PHYSICAL = {
+ BooleanType(): "BOOLEAN",
+ IntegerType(): "INT32",
+ LongType(): "INT64",
+ FloatType(): "FLOAT",
+ DoubleType(): "DOUBLE",
+ DateType(): "INT32",
+ TimeType(): "INT64",
+ TimestampType(): "INT64",
+ TimestamptzType(): "INT64",
+ StringType(): "BYTE_ARRAY",
+ UUIDType(): "FIXED_LEN_BYTE_ARRAY",
+ BinaryType(): "BYTE_ARRAY",
+}
+_PHYSICAL_TYPES = set(_PRIMITIVE_TO_PHYSICAL.values()).union({"INT96"})
+
+
+class StatsAggregator:
+ current_min: Any
+ current_max: Any
+ trunc_length: Optional[int]
+
+ def __init__(self, iceberg_type: PrimitiveType, physical_type_string: str,
trunc_length: Optional[int] = None) -> None:
+ self.current_min = None
+ self.current_max = None
+ self.trunc_length = trunc_length
+
+ if physical_type_string not in _PHYSICAL_TYPES:
+ raise ValueError(f"Unknown physical type {physical_type_string}")
+
+ if physical_type_string == "INT96":
+ raise NotImplementedError("Statistics not implemented for INT96
physical type")
+
+ expected_physical_type = _PRIMITIVE_TO_PHYSICAL[iceberg_type]
+ if expected_physical_type != physical_type_string:
+ raise ValueError(
+ f"Unexpected physical type {physical_type_string} for
{iceberg_type}, expected {expected_physical_type}"
+ )
+
+ self.primitive_type = iceberg_type
+
+ def serialize(self, value: Any) -> bytes:
+ if self.primitive_type == UUIDType():
+ value = uuid.UUID(bytes=value)
Review Comment:
Is this needed because Arrow internally represents the UUID type as
`fixed[16]`? If so, can't we just return the value directly since it's already
bytes?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
