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org.apache.spark.sql.catalyst.optimizer

PropagateEmptyRelation

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object PropagateEmptyRelation extends Rule[LogicalPlan] with PredicateHelper

Collapse plans consisting empty local relations generated by PruneFilters. 1. Binary(or Higher)-node Logical Plans

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  1. PropagateEmptyRelation
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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. def apply(plan: LogicalPlan): LogicalPlan

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    Definition Classes
    PropagateEmptyRelationRule
  5. final def asInstanceOf[T0]: T0

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  6. def canEvaluate(expr: Expression, plan: LogicalPlan): Boolean

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    Returns true if expr can be evaluated using only the output of plan.

    Returns true if expr can be evaluated using only the output of plan. This method can be used to determine when it is acceptable to move expression evaluation within a query plan.

    For example consider a join between two relations R(a, b) and S(c, d).

    - canEvaluate(EqualTo(a,b), R) returns true - canEvaluate(EqualTo(a,c), R) returns false - canEvaluate(Literal(1), R) returns true as literals CAN be evaluated on any plan

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    PredicateHelper
  7. def canEvaluateWithinJoin(expr: Expression): Boolean

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    Returns true iff expr could be evaluated as a condition within join.

    Returns true iff expr could be evaluated as a condition within join.

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    PredicateHelper
  8. def clone(): AnyRef

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  9. final def eq(arg0: AnyRef): Boolean

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  10. def equals(arg0: Any): Boolean

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  11. def finalize(): Unit

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    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]

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  13. def hashCode(): Int

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  14. def initializeLogIfNecessary(isInterpreter: Boolean): Unit

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    Logging
  15. final def isDebugEnabled: Boolean

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  16. final def isInfoEnabled: Boolean

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  17. final def isInstanceOf[T0]: Boolean

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  18. final def isTraceEnabled: Boolean

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  19. def log: Logger

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    Logging
  20. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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  21. def logDebug(msg: ⇒ String): Unit

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  22. def logError(msg: ⇒ String, throwable: Throwable): Unit

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    Logging
  23. def logError(msg: ⇒ String): Unit

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    Logging
  24. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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    Logging
  25. def logInfo(msg: ⇒ String): Unit

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    Logging
  26. def logName: String

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    Logging
  27. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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  28. def logTrace(msg: ⇒ String): Unit

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    Logging
  29. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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    Logging
  30. def logWarning(msg: ⇒ String): Unit

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    Logging
  31. final def ne(arg0: AnyRef): Boolean

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  32. final def notify(): Unit

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  33. final def notifyAll(): Unit

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  34. def replaceAlias(condition: Expression, aliases: AttributeMap[Expression]): Expression

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    PredicateHelper
  35. val ruleName: String

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

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

    Definition Classes
    Rule
  36. def splitConjunctivePredicates(condition: Expression): Seq[Expression]

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    PredicateHelper
  37. def splitDisjunctivePredicates(condition: Expression): Seq[Expression]

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    PredicateHelper
  38. final def synchronized[T0](arg0: ⇒ T0): T0

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  39. def toString(): String

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  40. final def wait(): Unit

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    @throws( ... )
  41. final def wait(arg0: Long, arg1: Int): Unit

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  42. final def wait(arg0: Long): Unit

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Inherited from PredicateHelper

Inherited from Rule[LogicalPlan]

Inherited from Logging

Inherited from AnyRef

Inherited from Any

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