Packages

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. 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. 2. Unary-node Logical Plans
    • Limit/Repartition 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
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new PropagateEmptyRelationBase()

Abstract Value Members

  1. abstract def apply(plan: LogicalPlan): LogicalPlan
    Definition Classes
    Rule

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. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. 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
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. def commonApplyFunc: PartialFunction[LogicalPlan, LogicalPlan]
    Attributes
    protected
  8. 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
  9. def empty(plan: LogicalPlan): LocalRelation
    Attributes
    protected
  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  12. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  13. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  14. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  15. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  16. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  17. def isEmpty(plan: LogicalPlan): Boolean
    Attributes
    protected
  18. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  19. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  20. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  21. def logDebug(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  22. def logDebug(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  23. def logError(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  24. def logError(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  25. def logInfo(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  26. def logInfo(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  27. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  28. def logTrace(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  29. def logTrace(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  30. def logWarning(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  31. def logWarning(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  32. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  33. def nonEmpty(plan: LogicalPlan): Boolean
    Attributes
    protected
  34. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  35. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  36. lazy val ruleId: RuleId
    Attributes
    protected
    Definition Classes
    Rule
  37. 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
  38. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  39. def toString(): String
    Definition Classes
    AnyRef → Any
  40. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  41. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  42. 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