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https://issues.apache.org/jira/browse/ARROW-14286?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche reassigned ARROW-14286:
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Assignee: Joris Van den Bossche
> [Python][Parquet] Allow to select columns of a list field without requiring
> the list component names
> ----------------------------------------------------------------------------------------------------
>
> Key: ARROW-14286
> URL: https://issues.apache.org/jira/browse/ARROW-14286
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Joris Van den Bossche
> Assignee: Joris Van den Bossche
> Priority: Major
> Labels: parquet
>
> Subtask for ARROW-14196.
> Currently, if you have a list column, where the list elements itself are
> nested items (eg a list of structs), selecting a subset of that list column
> requires something like {{columns=["columnA.list.item.subfield"]}}. While
> this "list.item" is superfluous, since a list always contains a single child.
> So ideally we allow to specify this as {{columns=["columnA.subfield"]}}.
> This also avoids relying on the exact name of the list item (item vs
> element), for which the default differs between Parquet and Arrow.
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