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[SPARK-6231][SQL/DF] Automatically resolve join condition ambiguity for self-joins.
See the comment in join function for more information. Author: Reynold Xin <rxin@databricks.com> Closes #5919 from rxin/self-join-resolve and squashes the following commits: e2fb0da [Reynold Xin] Updated SQLConf comment. 7233a86 [Reynold Xin] Updated comment. 6be2b4d [Reynold Xin] Removed println 9f6b72f [Reynold Xin] [SPARK-6231][SQL/DF] Automatically resolve ambiguity in join condition for self-joins.
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala 5 additions, 0 deletions...che/spark/sql/catalyst/expressions/namedExpressions.scala
- sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala 34 additions, 4 deletionssql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
- sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala 7 additions, 0 deletionssql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
- sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala 86 additions, 0 deletions.../test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala
- sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala 0 additions, 39 deletions.../src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
- sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameJoinSuite.scala 38 additions, 0 deletions...la/org/apache/spark/sql/hive/HiveDataFrameJoinSuite.scala
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