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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-216) Transpose arguments in MapsideJoinStrategy.join
Date Sat, 15 Feb 2014 23:26:19 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13902576#comment-13902576
] 

Josh Wills commented on CRUNCH-216:
-----------------------------------

Sorry-- don't you need to reverse both the left and right outer joins?

> Transpose arguments in MapsideJoinStrategy.join
> -----------------------------------------------
>
>                 Key: CRUNCH-216
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-216
>             Project: Crunch
>          Issue Type: Improvement
>            Reporter: Gabriel Reid
>         Attachments: CRUNCH-216.patch
>
>
> The MapsideJoinStrategy currently specifies that the smaller table in the join (i.e.
the table to be replicated and loaded in memory) should be on the right-hand side of the join.
> This is the opposite of what is done in all other join strategies, making it impossible
to just switch out another join strategy for a MapsideJoinStrategy. The MapsideJoinStrategy
could be brought in line with the other JoinStrategies to expect the smaller of two tables
to be provided as the left-side table.



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