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https://issues.apache.org/jira/browse/SPARK-12532?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust updated SPARK-12532:
-------------------------------------
Shepherd: Michael Armbrust
> Join-key Pushdown via Predicate Transitivity
> --------------------------------------------
>
> Key: SPARK-12532
> URL: https://issues.apache.org/jira/browse/SPARK-12532
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Xiao Li
> Labels: SQL
>
> {code}
> "SELECT * FROM upperCaseData JOIN lowerCaseData where lowerCaseData.n =
> upperCaseData.N and lowerCaseData.n = 3"
> {code}
> {code}
> == Analyzed Logical Plan ==
> N: int, L: string, n: int, l: string
> Project [N#16,L#17,n#18,l#19]
> +- Filter ((n#18 = N#16) && (n#18 = 3))
> +- Join Inner, None
> :- Subquery upperCaseData
> : +- LogicalRDD [N#16,L#17], MapPartitionsRDD[17] at beforeAll at
> BeforeAndAfterAll.scala:187
> +- Subquery lowerCaseData
> +- LogicalRDD [n#18,l#19], MapPartitionsRDD[19] at beforeAll at
> BeforeAndAfterAll.scala:187
> {code}
> Before the improvement, the optimized logical plan is
> {code}
> == Optimized Logical Plan ==
> Project [N#16,L#17,n#18,l#19]
> +- Join Inner, Some((n#18 = N#16))
> :- LogicalRDD [N#16,L#17], MapPartitionsRDD[17] at beforeAll at
> BeforeAndAfterAll.scala:187
> +- Filter (n#18 = 3)
> +- LogicalRDD [n#18,l#19], MapPartitionsRDD[19] at beforeAll at
> BeforeAndAfterAll.scala:187
> {code}
> After the improvement, the optimized logical plan should be like
> {code}
> == Optimized Logical Plan ==
> Project [N#16,L#17,n#18,l#19]
> +- Join Inner, Some((n#18 = N#16))
> :- Filter (N#16 = 3)
> : +- LogicalRDD [N#16,L#17], MapPartitionsRDD[17] at beforeAll at
> BeforeAndAfterAll.scala:187
> +- Filter (n#18 = 3)
> +- LogicalRDD [n#18,l#19], MapPartitionsRDD[19] at beforeAll at
> BeforeAndAfterAll.scala:187
> {code}
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