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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HIVE-1781) outputs not populated for dynamic partitions at compile time
Date Thu, 11 Nov 2010 17:16:20 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Namit Jain reassigned HIVE-1781:
--------------------------------

    Assignee: Namit Jain

> outputs not populated for dynamic partitions at compile time
> ------------------------------------------------------------
>
>                 Key: HIVE-1781
>                 URL: https://issues.apache.org/jira/browse/HIVE-1781
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>
> OSTHOOK: query: create table tstsrcpart like srcpart
> POSTHOOK: type: CREATETABLE
> POSTHOOK: Output: default@tstsrcpart
> PREHOOK: query: from srcpart
> insert overwrite table tstsrcpart partition (ds, hr) select key, value, ds, hr where
ds <= '2008-04-08'
> PREHOOK: type: QUERY
> PREHOOK: Input: default@srcpart@ds=2008-04-08/hr=11
> PREHOOK: Input: default@srcpart@ds=2008-04-08/hr=12
> POSTHOOK: query: from srcpart
> As is evident from above, the outputs are not populated at all at compile time.
> This may create a problem for many components that depend on outputs: locking, authorization
etc.
> However, the exact set of outputs may be needed for some other components (for example.
the
> internal deployment in Facebook has a replication hook which is used for replication
which needs the
> exact set of outputs). It may  be a good idea to extend WriteEntity to include a flag
which indicates
> whether the output is complete or not, and then the hook can look at that flag if needed

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