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  • package root
    Definition Classes
    root
  • package org
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    root
  • package apache
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    org
  • package spark
    Definition Classes
    apache
  • package sql

    Allows the execution of relational queries, including those expressed in SQL using Spark.

    Allows the execution of relational queries, including those expressed in SQL using Spark.

    Definition Classes
    spark
  • package execution

    The physical execution component of Spark SQL.

    The physical execution component of Spark SQL. Note that this is a private package. All classes in catalyst are considered an internal API to Spark SQL and are subject to change between minor releases.

    Definition Classes
    sql
  • package analysis
    Definition Classes
    execution
  • object DetectAmbiguousSelfJoin extends Rule[LogicalPlan]

    Detects ambiguous self-joins, so that we can fail the query instead of returning confusing results.

    Detects ambiguous self-joins, so that we can fail the query instead of returning confusing results.

    Dataset column reference is simply an AttributeReference that is returned by Dataset#col. Most of time we don't need to do anything special, as AttributeReference can point to the column precisely. However, in case of self-join, the analyzer generates AttributeReference with new expr IDs for the right side plan of the join. If the Dataset column reference points to a column in the right side plan of a self-join, users will get unexpected result because the column reference can't match the newly generated AttributeReference.

    Note that, this rule removes all the Dataset id related metadata from AttributeReference, so that they don't exist after analyzer.

    Definition Classes
    analysis
  • AttrWithCast
  • LogicalPlanWithDatasetId

object LogicalPlanWithDatasetId

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  16. def toString(): String
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  17. def unapply(p: LogicalPlan): Option[(LogicalPlan, HashSet[Long])]
  18. final def wait(): Unit
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  19. final def wait(arg0: Long, arg1: Int): Unit
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  20. final def wait(arg0: Long): Unit
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