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https://issues.apache.org/jira/browse/ARROW-9137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17151661#comment-17151661
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Kouhei Sutou commented on ARROW-9137:
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Could you open a separated issue for Python?
> [GLib][Ruby] Allow to read Parquet files in chunks (by RowGroup)
> ----------------------------------------------------------------
>
> Key: ARROW-9137
> URL: https://issues.apache.org/jira/browse/ARROW-9137
> Project: Apache Arrow
> Issue Type: Improvement
> Components: GLib, Ruby
> Affects Versions: 0.17.1
> Reporter: Dimitrij Denissenko
> Assignee: Kouhei Sutou
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> At the moment only `gparquet_arrow_file_reader_read_table` is exported which
> requires the reader to load all row-groups. Additionally, it would be
> extremely helpful to have access to the `ReadRowGroup` method which would
> allow reading parts of the file without having to load everything into memory.
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