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https://issues.apache.org/jira/browse/HIVEMALL-88?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15928262#comment-15928262
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Takeshi Yamamuro commented on HIVEMALL-88:
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Resolved by https://github.com/apache/incubator-hivemall/pull/61
> Support a function to flatten a nested schema
> ---------------------------------------------
>
> Key: HIVEMALL-88
> URL: https://issues.apache.org/jira/browse/HIVEMALL-88
> Project: Hivemall
> Issue Type: Improvement
> Reporter: Takeshi Yamamuro
> Labels: Spark
>
> Since parquet is first-citizen in Spark, most of users use nested schemas in
> DF. In some usecases, they need to flatten nested schemas into flat ones to
> dump data into the other systems that do not support nested schemas, e.g.,
> RDBMS. So, it is useful to support conversion function from nested schemas to
> flat ones.
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