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https://issues.apache.org/jira/browse/ARROW-3337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney updated ARROW-3337:
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Summary: [JS] IPC writer doesn't serialize the dictionary of nested Vectors
(was: JS writer doesn't serialize the dictionary of nested Vectors)
> [JS] IPC writer doesn't serialize the dictionary of nested Vectors
> ------------------------------------------------------------------
>
> Key: ARROW-3337
> URL: https://issues.apache.org/jira/browse/ARROW-3337
> Project: Apache Arrow
> Issue Type: Improvement
> Components: JavaScript
> Affects Versions: JS-0.3.1
> Reporter: Paul Taylor
> Assignee: Paul Taylor
> Priority: Major
> Fix For: JS-0.4.0
>
>
> The JS writer only serializes dictionaries for [top-level
> children|https://github.com/apache/arrow/blob/ee9b1ba426e2f1f117cde8d8f4ba6fbe3be5674c/js/src/ipc/writer/binary.ts#L40]
> of a Table. This is wrong, and an oversight on my part. The fix here is to
> put the actual Dictionary vectors in the `schema.dictionaries` map instead of
> the dictionary fields, like I understand the C++ does.
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