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From "Dong Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-10642) Update Timestamp type mapping to Parquet
Date Mon, 11 May 2015 08:02:59 GMT

    [ https://issues.apache.org/jira/browse/HIVE-10642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14537699#comment-14537699
] 

Dong Chen commented on HIVE-10642:
----------------------------------

Update patch v1 to address comments.

> Update Timestamp type mapping to Parquet 
> -----------------------------------------
>
>                 Key: HIVE-10642
>                 URL: https://issues.apache.org/jira/browse/HIVE-10642
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Dong Chen
>            Assignee: Dong Chen
>         Attachments: HIVE-10642-parquet.1.patch, HIVE-10642-parquet.patch
>
>
> Timestamp in Hive was originally mapped to INT_96 in Parquet before. And inside Parquet
it use Binary to save values.
> When working on HIVE-10255, I found predicate with timestamp does not work, since comparing
Binary representative of Timestamp value can not give correct relationship.
> Meanwhile, in latest version Parquet, the timestamp is mapped to INT_64. Refer to https://github.com/Parquet/parquet-format/blob/master/LogicalTypes.md
> Therefore, this Jira will update the mapping of Timestamp type in Hive, and keep it backward
compatible.



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