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c

org.apache.spark.sql.catalyst.optimizer

PropagateEmptyRelationBase

abstract class PropagateEmptyRelationBase extends Rule[LogicalPlan] with CastSupport

The base class of two rules in the normal and AQE Optimizer. It simplifies query plans with empty or non-empty relations:

  1. Higher-node Logical Plans
    • Union with all empty children. 2. Binary-node Logical Plans
    • Join with one or two empty children (including Intersect/Except).
    • Left semi Join Right side is non-empty and condition is empty. Eliminate join to its left side.
    • Left anti join Right side is non-empty and condition is empty. Eliminate join to an empty LocalRelation. 3. Unary-node Logical Plans
    • Project/Filter/Sample with all empty children.
    • Limit/Repartition/RepartitionByExpression/Rebalance with all empty children.
    • Aggregate with all empty children and at least one grouping expression.
    • Generate(Explode) with all empty children. Others like Hive UDTF may return results.
Linear Supertypes
CastSupport, Rule[LogicalPlan], Logging, SQLConfHelper, AnyRef, Any
Known Subclasses
PropagateEmptyRelation
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. PropagateEmptyRelationBase
  2. CastSupport
  3. Rule
  4. Logging
  5. SQLConfHelper
  6. AnyRef
  7. Any
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  2. Show All
Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new PropagateEmptyRelationBase()

Abstract Value Members

  1. abstract def applyInternal(plan: LogicalPlan): LogicalPlan
    Attributes
    protected

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def apply(plan: LogicalPlan): LogicalPlan
    Definition Classes
    PropagateEmptyRelationBase → Rule
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def cast(child: Expression, dataType: DataType): Cast

    Create a Cast expression with the session local time zone.

    Create a Cast expression with the session local time zone.

    Definition Classes
    CastSupport
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  8. def commonApplyFunc: PartialFunction[LogicalPlan, LogicalPlan]
    Attributes
    protected
  9. def conf: SQLConf

    The active config object within the current scope.

    The active config object within the current scope. See SQLConf.get for more information.

    Definition Classes
    SQLConfHelper
  10. def empty(plan: LogicalPlan): LocalRelation
    Attributes
    protected
  11. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  13. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  14. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  15. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  16. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  17. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  18. def isEmpty(plan: LogicalPlan): Boolean
    Attributes
    protected
  19. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  20. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  21. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  22. def logDebug(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  23. def logDebug(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  24. def logError(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  25. def logError(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  26. def logInfo(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  27. def logInfo(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  28. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  29. def logTrace(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  30. def logTrace(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  31. def logWarning(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  32. def logWarning(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  33. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  34. def nonEmpty(plan: LogicalPlan): Boolean
    Attributes
    protected
  35. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  36. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  37. lazy val ruleId: RuleId
    Attributes
    protected
    Definition Classes
    Rule
  38. val ruleName: String

    Name for this rule, automatically inferred based on class name.

    Name for this rule, automatically inferred based on class name.

    Definition Classes
    Rule
  39. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  40. def toString(): String
    Definition Classes
    AnyRef → Any
  41. def userSpecifiedRepartition(p: LogicalPlan): Boolean
    Attributes
    protected
  42. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  43. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  44. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from CastSupport

Inherited from Rule[LogicalPlan]

Inherited from Logging

Inherited from SQLConfHelper

Inherited from AnyRef

Inherited from Any

Ungrouped