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https://issues.apache.org/jira/browse/ARROW-9332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17156646#comment-17156646
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Joris Van den Bossche commented on ARROW-9332:
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Basic pickling of RowGroupInfo (that at least preserves the row group id) was
added in ARROW-9321 (https://github.com/apache/arrow/pull/7692). Further
enhancement could also preserve num_rows, total_byte_size and statistics (but
that is less a priority). Pickling the statistics will first require pickling
of scalars -> ARROW-9394
> [Python][Dataset] Support pickling of ParquetFileFragment's RowGroupInfo
> ------------------------------------------------------------------------
>
> Key: ARROW-9332
> URL: https://issues.apache.org/jira/browse/ARROW-9332
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Joris Van den Bossche
> Priority: Major
> Labels: dataset, dataset-dask-integration
>
> Follow-up on ARROW-8651 to ensure we can also preserve the statistics
> information of {{RowGroupInfo}} of a {{ParquetFileFragment}}
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