ColumnStatsMap

This class contains the original column stats from child, and maintains the updated column stats. We will update the corresponding ColumnStats for a column after we apply a predicate condition. For example, column c has [min, max] value as [0, 100]. In a range condition such as (c > 40 AND c <= 50), we need to set the column's [min, max] value to [40, 100] after we evaluate the first condition c > 40. We also need to set the column's [min, max] value to [40, 50] after we evaluate the second condition c <= 50.

originalMap: Original column stats from child.

Linear Supertypes

Serializable, Serializable, Product, Equals, AnyRef, Any

Instance Constructors

new ColumnStatsMap(originalMap: AttributeMap[ColumnStat])

originalMap
Original column stats from child.

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

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

Definition Classes
AnyRef → Any
def apply(a: Attribute): ColumnStat

Gets column stat for the given attribute.
Gets column stat for the given attribute. Prefer the column stat in updatedMap than that in originalMap, because updatedMap has the latest (updated) column stats.
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

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

Definition Classes
AnyRef
def finalize(): Unit

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

Definition Classes
AnyRef → Any
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
val originalMap: AttributeMap[ColumnStat]

Original column stats from child.
def outputColumnStats(rowsBeforeFilter: BigInt, rowsAfterFilter: BigInt): AttributeMap[ColumnStat]

Collects updated column stats, and scales down ndv for other column stats if the number of rows decreases after this Filter operator.
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def update(a: Attribute, stats: ColumnStat): Unit

Updates column stats in updatedMap.
final def wait(): Unit

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

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

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Doc: package statsEstimation

case class ColumnStatsMap(originalMap: AttributeMap[ColumnStat]) extends Product with Serializable

Instance Constructors

new ColumnStatsMap(originalMap: AttributeMap[ColumnStat])

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

def apply(a: Attribute): ColumnStat

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def contains(a: Attribute): Boolean

final def eq(arg0: AnyRef): Boolean

def finalize(): Unit

final def getClass(): Class[_]

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

val originalMap: AttributeMap[ColumnStat]

def outputColumnStats(rowsBeforeFilter: BigInt, rowsAfterFilter: BigInt): AttributeMap[ColumnStat]

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

def update(a: Attribute, stats: ColumnStat): Unit

final def wait(): Unit

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

final def wait(arg0: Long): Unit

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped