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Posted to issues@hivemall.apache.org by "Takeshi Yamamuro (JIRA)" <ji...@apache.org> on 2017/03/16 15:24:41 UTC

[jira] [Resolved] (HIVEMALL-88) Support a function to flatten a nested schema

     [ https://issues.apache.org/jira/browse/HIVEMALL-88?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Takeshi Yamamuro resolved HIVEMALL-88.
--------------------------------------
    Resolution: Fixed
      Assignee: Takeshi Yamamuro

> 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
>            Assignee: 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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