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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2013/04/29 05:10:16 UTC

[jira] [Commented] (HIVE-4439) Remove unused join configuration parameter: hive.mapjoin.cache.numrows

    [ https://issues.apache.org/jira/browse/HIVE-4439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13644220#comment-13644220 ] 

Ashutosh Chauhan commented on HIVE-4439:
----------------------------------------

jdbm was used way back in initial implementation of map-join and than subsequently removed. This config variable doesn't do anything useful now.
+1 will commit if tests pass.
                
> Remove unused join configuration parameter: hive.mapjoin.cache.numrows
> ----------------------------------------------------------------------
>
>                 Key: HIVE-4439
>                 URL: https://issues.apache.org/jira/browse/HIVE-4439
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gunther Hagleitner
>            Assignee: Gunther Hagleitner
>         Attachments: HIVE-4439.1.patch
>
>
> The description says:
> "How many rows should be cached by jdbm for map join."
> I can't find any reference to that parameter in the code however.

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