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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HIVE-9757) LLAP: Reuse string dictionaries per column per stripe when processing row groups
Date Mon, 02 Mar 2015 21:24:04 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasanth Jayachandran resolved HIVE-9757.
-----------------------------------------
    Resolution: Fixed

Fixed by HIVE-9782

> LLAP: Reuse string dictionaries per column per stripe when processing row groups
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-9757
>                 URL: https://issues.apache.org/jira/browse/HIVE-9757
>             Project: Hive
>          Issue Type: Sub-task
>    Affects Versions: llap
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>             Fix For: llap
>
>
> Dictionary streams are cached by low level cache. When creating column vectors from streams
we create dictionary for every row group that we process. We should add per query cache to
cache the deserialized representation of dictionary per stripe per column. 



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