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From "Takeshi Yamamuro (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (SPARK-26868) Duplicate error message for implicit cartesian product in verbose explain
Date Thu, 14 Feb 2019 06:47:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-26868?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Takeshi Yamamuro updated SPARK-26868:
-------------------------------------
    Comment: was deleted

(was: Thanks, [~dongjoon]!

I might misunderstand the affected version;

Since the guide says "Affects Version. For Bugs, assign at least one version that is known
to exhibit the problem or need the change", we set the already-released version there? )

> Duplicate error message for implicit cartesian product in verbose explain
> -------------------------------------------------------------------------
>
>                 Key: SPARK-26868
>                 URL: https://issues.apache.org/jira/browse/SPARK-26868
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Takeshi Yamamuro
>            Priority: Trivial
>
> Super trivial though, I just report this just in case (I think it would be nice if we
could print this error message in a cleaner way):
> {code:java}
> scala> Seq(1).toDF("id").write.saveAsTable("t1")
> scala> Seq(1).toDF("id").write.saveAsTable("t2")
> scala> sql("SELECT * FROM t1 JOIN t2").explain(true)
> == Parsed Logical Plan ==
> 'Project [*]
> +- 'Join Inner
>    :- 'UnresolvedRelation `t1`
>    +- 'UnresolvedRelation `t2`
> == Analyzed Logical Plan ==
> id: int, id: int
> Project [id#14, id#15]
> +- Join Inner
>    :- SubqueryAlias `default`.`t1`
>    :  +- Relation[id#14] parquet
>    +- SubqueryAlias `default`.`t2`
>       +- Relation[id#15] parquet
> == Optimized Logical Plan ==
> org.apache.spark.sql.AnalysisException: Detected implicit cartesian product for INNER
join between logical plans
> Relation[id#14] parquet
> and
> Relation[id#15] parquet
> Join condition is missing or trivial.
> Either: use the CROSS JOIN syntax to allow cartesian products between these
> relations, or: enable implicit cartesian products by setting the configuration
> variable spark.sql.crossJoin.enabled=true;
> == Physical Plan ==
> org.apache.spark.sql.AnalysisException: Detected implicit cartesian product for INNER
join between logical plans
> Relation[id#14] parquet
> and
> Relation[id#15] parquet
> Join condition is missing or trivial.
> Either: use the CROSS JOIN syntax to allow cartesian products between these
> relations, or: enable implicit cartesian products by setting the configuration
> variable spark.sql.crossJoin.enabled=true;
> {code}



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