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https://issues.apache.org/jira/browse/ARROW-3388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17094518#comment-17094518
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Francois Saint-Jacques commented on ARROW-3388:
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I think it's normal to require a schema.
> [Python] boolean Partition keys in ParquetDataset are reconstructed as string
> -----------------------------------------------------------------------------
>
> Key: ARROW-3388
> URL: https://issues.apache.org/jira/browse/ARROW-3388
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: Uwe Korn
> Priority: Major
> Labels: dataset, dataset-parquet-read, parquet
> Fix For: 1.0.0
>
>
> Saving a {{ParquetDataset}} using a boolean column as a partitioning column
> will store {{True/False}} as the values in the path. On reload these columns
> will then be string columns with the values {{'True'}} and {{'False'}}.
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