Jim Fulton created ARROW-15233:
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Summary: pyarrow.dataset.dataset loses type information when
reading parquet files
Key: ARROW-15233
URL: https://issues.apache.org/jira/browse/ARROW-15233
Project: Apache Arrow
Issue Type: Bug
Components: Python
Affects Versions: 6.0.1
Environment: Ubuntu 20.2, Python 3.8.10
Reporter: Jim Fulton
When reading a parquet containing time data:
{{>>> import pyarrow.dataset}}
{{>>> ds = pyarrow.dataset.dataset('foo.parquet', format='parquet')}}
{{>>> ds.schema[1].type}}
{{DataType(time32[ms])}}
I get {{DataType}} rather than {{{}Time32Type{}}}, which means I can't query
time units.
I assume this is an issue for other non-basic types.
I can write code to scrape the type's string representation. Is there a better
way?
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