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https://issues.apache.org/jira/browse/ARROW-8221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche updated ARROW-8221:
-
Description:
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 or
validating the schema. Not sure yet what the best API for this would be.
was:
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.
> [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
>Priority: Major
> 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
> or validating the schema. Not sure yet what the best API for this would be.
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