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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/02/01 06:15:51 UTC
[jira] [Commented] (SPARK-19419) Unable to detect all the cases of
cartesian products when spark.sql.crossJoin.enabled is false
[ https://issues.apache.org/jira/browse/SPARK-19419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848057#comment-15848057 ]
Apache Spark commented on SPARK-19419:
--------------------------------------
User 'gatorsmile' has created a pull request for this issue:
https://github.com/apache/spark/pull/16762
> Unable to detect all the cases of cartesian products when spark.sql.crossJoin.enabled is false
> ----------------------------------------------------------------------------------------------
>
> Key: SPARK-19419
> URL: https://issues.apache.org/jira/browse/SPARK-19419
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Xiao Li
> Assignee: Xiao Li
>
> The existing detection is unable to cover all the cartesian product cases. For example,
> - Case 1) having non-equal predicates in join conditiions of an inner join.
> - Case 2) equi-join's key columns are not sortable and both sides are not small enough for broadcasting.
> This PR is to move the cross-join detection back to `BroadcastNestedLoopJoinExec` and `CartesianProductExec`.
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