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Type:
New Feature
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Resolution: Unresolved
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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None
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Python Drivers
PyMongoArrow's treatment of the "binary" data type is murky. It is handled as a PyArrow ExtensionType. It is closest to PyArrow's FixedSizeBinaryType. This ticket is to add support for pyarrow.binary() and pyarrow.large_binary. The following gives a sense of the so-called murkiness.
pa.binary() Out[12]: DataType(binary) pa.binary(12) Out[13]: FixedSizeBinaryType(fixed_size_binary[12]) pa.large_binary() Out[14]: DataType(large_binary) from pymongoarrow.types import BinaryType BinaryType(10) Out[16]: BinaryType(DataType(binary))
More concretely, the following attempt to write a pyarrow.Table with DataType(binary) fails.
import pyarrow as pa
from pymongoarrow.api import write
from pymongo import MongoClient
coll = MongoClient().db.coll
aschema = pa.schema([("Binary", pa.binary())])
table_in = pa.Table.from_pydict({"Binary": [b"1", b"one"]}, schema=aschema)
write(coll, table_in)
with the following
File "/Users/casey.clements/src/mongo-arrow/bindings/python/pymongoarrow/api.py", line 432, in write
_validate_schema(tabular.schema.types)
File "/Users/casey.clements/src/mongo-arrow/bindings/python/pymongoarrow/types.py", line 324, in _validate_schema
raise ValueError(msg)
ValueError: Unsupported data type "binary" in schema
- is related to
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INTPYTHON-251 Support fixed size binary data type
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- Backlog
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- related to
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- Closed
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