Object

org.apache.spark.sql.catalyst.optimizer

RewritePredicateSubquery

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object RewritePredicateSubquery extends Rule[LogicalPlan] with PredicateHelper

This rule rewrites predicate sub-queries into left semi/anti joins. The following predicates are supported: a. EXISTS/NOT EXISTS will be rewritten as semi/anti join, unresolved conditions in Filter will be pulled out as the join conditions. b. IN/NOT IN will be rewritten as semi/anti join, unresolved conditions in the Filter will be pulled out as join conditions, value = selected column will also be used as join condition.

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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
    RewritePredicateSubqueryRule
  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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    Definition Classes
    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 isInstanceOf[T0]: Boolean

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  16. def isTraceEnabled(): Boolean

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    Logging
  17. def log: Logger

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

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

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

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

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

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  23. def logInfo(msg: ⇒ String): Unit

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  24. def logName: String

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

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

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

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

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

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  30. final def notify(): Unit

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  31. final def notifyAll(): Unit

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

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    PredicateHelper
  33. 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.

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    Rule
  34. def splitConjunctivePredicates(condition: Expression): Seq[Expression]

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

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

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  37. def toString(): String

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  38. final def wait(): Unit

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

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    @throws( ... )
  40. final def wait(arg0: Long): Unit

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Inherited from PredicateHelper

Inherited from Rule[LogicalPlan]

Inherited from Logging

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