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https://issues.apache.org/jira/browse/ARROW-274?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julien Le Dem resolved ARROW-274.
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Resolution: Fixed
Issue resolved by pull request 128
[https://github.com/apache/arrow/pull/128]
> Make the MapVector nullable
> ---------------------------
>
> Key: ARROW-274
> URL: https://issues.apache.org/jira/browse/ARROW-274
> Project: Apache Arrow
> Issue Type: Bug
> Components: Java - Vectors
> Reporter: Julien Le Dem
>
> Currently the MapVector used to store Structs (aka Tuples) does not have a
> validity inner vector. As such struct types can not be null.
> Based on the use of The MapVector I'm thinking of creating a
> NullableMapVector for this purpose that would encapsulate the MapVector
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