Joris Van den Bossche created ARROW-8221:
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Summary: [Python][Dataset] Expose schema inference / validation
options in the factory
Key: ARROW-8221
URL: https://issues.apache.org/jira/browse/ARROW-8221
Project: Apache Arrow
Issue Type: Improvement
Components: Python
Reporter: Joris Van den Bossche
Fix For: 0.17.0
ARROW-8058 added options related to schema inference / validation for the
Dataset factory. We should expose this in Python in the {{dataset(..)}} factory
function:
- Add ability to pass a user-specified schema with a {{schema}} keyword,
instead of inferring the schema from (one of) the files (to be passed to the
factory finish method)
- Add {{validate_schema}} option to toggle whether the schema is validated
against the actual files or not.
- Expose in some way the number of fragments to be inspected when inferring the
schema. Not sure yet what the best API for this would be.
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