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Posted to dev@crunch.apache.org by "Gabriel Reid (JIRA)" <ji...@apache.org> on 2013/06/10 09:13:20 UTC

[jira] [Created] (CRUNCH-216) Transpose arguments in MapsideJoinStrategy.join

Gabriel Reid created CRUNCH-216:
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             Summary: 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


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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