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Posted to issues@spark.apache.org by "Michael Armbrust (JIRA)" <ji...@apache.org> on 2014/11/20 21:36:34 UTC
[jira] [Updated] (SPARK-3839) Reimplement HashOuterJoin to
construct hash table of only one relation
[ https://issues.apache.org/jira/browse/SPARK-3839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Armbrust updated SPARK-3839:
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Target Version/s: 1.3.0 (was: 1.2.0)
> Reimplement HashOuterJoin to construct hash table of only one relation
> ----------------------------------------------------------------------
>
> Key: SPARK-3839
> URL: https://issues.apache.org/jira/browse/SPARK-3839
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.1.0
> Reporter: Liquan Pei
> Assignee: Liquan Pei
>
> Currently, in HashOuterJoin, we build hash tables for both relations, however, in left/right outer join, we only need to build hash table for one relation. For example, for left hash join, we build a hash table for the right relation and stream the left relation.
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