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Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2011/02/04 20:02:30 UTC
[jira] Assigned: (HIVE-1900) a mapper should be able to span
multiple partitions
[ https://issues.apache.org/jira/browse/HIVE-1900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Namit Jain reassigned HIVE-1900:
--------------------------------
Assignee: Krishna Kumar (was: Namit Jain)
> a mapper should be able to span multiple partitions
> ---------------------------------------------------
>
> Key: HIVE-1900
> URL: https://issues.apache.org/jira/browse/HIVE-1900
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Krishna Kumar
> Attachments: hive.1900.1.patch
>
>
> Currently, a mapper only spans a single partition which creates a problem in the presence of many
> small partitions (which is becoming a common usecase in facebook).
> If the plan is the same, a mapper should be able to span files across multiple partitions
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