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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5171) metastore server can cache pruning results across queries
Date Thu, 29 Aug 2013 21:33:51 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HIVE-5171:
-----------------------------------

    Assignee:     (was: Sergey Shelukhin)
    
> metastore server can cache pruning results across queries 
> ----------------------------------------------------------
>
>                 Key: HIVE-5171
>                 URL: https://issues.apache.org/jira/browse/HIVE-5171
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Sergey Shelukhin
>
> Partition pruning results are cached during a query (SemanticAnalyzer and ParseContext
are the scope). 
> We could also cache them between queries in MetaStore, which would be especially useful
if metastore server is remote and thus long-lived/shared between clients.
> It may be more complex than it seems due to OOM potential. Also the key would need to
be changed since the same expression string that is currently used may mean different things
for different queries.

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