Sam Oluwalana created ARROW-3002:
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Summary: Inconsistent DataType Hashing
Key: ARROW-3002
URL: https://issues.apache.org/jira/browse/ARROW-3002
Project: Apache Arrow
Issue Type: Bug
Reporter: Sam Oluwalana
{code:python}
>>> x = pa.field('record', pa.struct([pa.field('x', pa.int32(),
>>> nullable=False)]))
>>> y = pa.field('record', pa.struct([pa.field('x', pa.int32(),
>>> nullable=True)]))
>>> x.__hash__()
-9223372036569171727
>>> y.__hash__()
285604054
>>> x.type
StructType(struct<x: int32>)
>>> x.type.__hash__()
429437081997812647
>>> y.type.__hash__()
429437081997812647
>>> x
pyarrow.Field<record: struct<x: int32>>
>>> y
pyarrow.Field<record: struct<x: int32>>
}
{code}
The StructType should take nullable fields into account when generating the
hash.
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