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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2016/02/23 01:34:18 UTC
[jira] [Resolved] (SPARK-13422) Use HashedRelation instead of
HashSet in Left Semi Joins
[ https://issues.apache.org/jira/browse/SPARK-13422?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Reynold Xin resolved SPARK-13422.
---------------------------------
Resolution: Fixed
Assignee: Xiu (Joe) Guo
Fix Version/s: 2.0.0
> Use HashedRelation instead of HashSet in Left Semi Joins
> --------------------------------------------------------
>
> Key: SPARK-13422
> URL: https://issues.apache.org/jira/browse/SPARK-13422
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Herman van Hovell
> Assignee: Xiu (Joe) Guo
> Priority: Minor
> Fix For: 2.0.0
>
>
> {{BroadcastLeftSemiJoinHash}} and {{LeftSemiJoinHash}} both use a {{HashSet}} when not condition (besides the equality conditions) has been defined. We should use the {{HashedRelation here}}, this is a more optimized datastructure for the problem at hand and this reduces code complexity.
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