QueryPlanner

Abstract class for transforming LogicalPlans into physical plans. Child classes are responsible for specifying a list of GenericStrategy objects that each of which can return a list of possible physical plan options. If a given strategy is unable to plan all of the remaining operators in the tree, it can call planLater, which returns a placeholder object that will be filled in using other available strategies.

TODO: RIGHT NOW ONLY ONE PLAN IS RETURNED EVER... PLAN SPACE EXPLORATION WILL BE IMPLEMENTED LATER.

PhysicalPlan: The type of physical plan produced by this QueryPlanner

Linear Supertypes

AnyRef, Any

Instance Constructors

new QueryPlanner()

Abstract Value Members

abstract def collectPlaceholders(plan: PhysicalPlan): Seq[(PhysicalPlan, LogicalPlan)]

Collects placeholders marked as planLater by strategy and its LogicalPlans
Collects placeholders marked as planLater by strategy and its LogicalPlans

Attributes
protected
abstract def prunePlans(plans: Iterator[PhysicalPlan]): Iterator[PhysicalPlan]

Prunes bad plans to prevent combinatorial explosion.
Prunes bad plans to prevent combinatorial explosion.

Attributes
protected
abstract def strategies: Seq[GenericStrategy[PhysicalPlan]]

A list of execution strategies that can be used by the planner

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
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final def ##(): Int

Definition Classes
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final def ==(arg0: Any): Boolean

Definition Classes
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final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
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def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
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def hashCode(): Int

Definition Classes
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final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
def plan(plan: LogicalPlan): Iterator[PhysicalPlan]
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
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final def wait(): Unit

Definition Classes
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Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
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Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
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Annotations
@throws( ... )

Related Doc: package planning

abstract class QueryPlanner[PhysicalPlan <: TreeNode[PhysicalPlan]] extends AnyRef

Instance Constructors

new QueryPlanner()

Abstract Value Members

abstract def collectPlaceholders(plan: PhysicalPlan): Seq[(PhysicalPlan, LogicalPlan)]

abstract def prunePlans(plans: Iterator[PhysicalPlan]): Iterator[PhysicalPlan]

abstract def strategies: Seq[GenericStrategy[PhysicalPlan]]

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def plan(plan: LogicalPlan): Iterator[PhysicalPlan]

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from AnyRef

Inherited from Any

Ungrouped