[jira] [Commented] (HIVE-18211) Support to read multiple level definition for Map type in Parquet file

["Colin Ma (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-18211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16279741#comment-16279741 ] 

Colin Ma commented on HIVE-18211:
---------------------------------

[~Ferd], can you help to review the patch, thanks.

> Support to read multiple level definition for Map type in Parquet file
> ----------------------------------------------------------------------
>
>                 Key: HIVE-18211
>                 URL: https://issues.apache.org/jira/browse/HIVE-18211
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Colin Ma
>            Assignee: Colin Ma
>         Attachments: HIVE-18211.001.patch
>
>
> For the current implementation with VectorizedParquetRecordReader, only following definition for map type is supported:
> {code}
> repeated group map (MAP_KEY_VALUE) {
>     required binary key (UTF8); optional binary value (UTF8);}
> }
> {code}
> The implementation should support multiple level definition like:
> {code}
> optional group m1 (MAP) {
>     repeated group map (MAP_KEY_VALUE)
>         {required binary key (UTF8); optional binary value (UTF8);}
> }
> {code}



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