MutableProjection

Converts a InternalRow to another Row given a sequence of expression that define each column of the new row. If the schema of the input row is specified, then the given expression will be bound to that schema.

In contrast to a normal projection, a MutableProjection reuses the same underlying row object each time an input row is added. This significantly reduces the cost of calculating the projection, but means that it is not safe to hold on to a reference to a InternalRow after next() has been called on the Iterator that produced it. Instead, the user must call InternalRow.copy() and hold on to the returned InternalRow before calling next().

Linear Supertypes

Projection, (InternalRow) ⇒ InternalRow, AnyRef, Any

Known Subclasses

BaseMutableProjection, InterpretedMutableProjection

Instance Constructors

new MutableProjection()

Abstract Value Members

abstract def apply(v1: InternalRow): InternalRow

Definition Classes
Function1
abstract def currentValue: InternalRow
abstract def target(row: InternalRow): MutableProjection

Uses the given row to store the output of the projection.

Concrete 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 andThen[A](g: (InternalRow) ⇒ A): (InternalRow) ⇒ A

Definition Classes
Function1
Annotations
@unspecialized()
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
def compose[A](g: (A) ⇒ InternalRow): (A) ⇒ InternalRow

Definition Classes
Function1
Annotations
@unspecialized()
final def eq(arg0: AnyRef): Boolean

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

Definition Classes
AnyRef → Any
def finalize(): Unit

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

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
def initialize(partitionIndex: Int): Unit

Initializes internal states given the current partition index.
Initializes internal states given the current partition index. This is used by nondeterministic expressions to set initial states. The default implementation does nothing.

Definition Classes
Projection
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
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
Function1 → AnyRef → Any
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 expressions

abstract class MutableProjection extends Projection

Instance Constructors

new MutableProjection()

Abstract Value Members

abstract def apply(v1: InternalRow): InternalRow

abstract def currentValue: InternalRow

abstract def target(row: InternalRow): MutableProjection

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

def andThen[A](g: (InternalRow) ⇒ A): (InternalRow) ⇒ A

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def compose[A](g: (A) ⇒ InternalRow): (A) ⇒ InternalRow

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

def initialize(partitionIndex: Int): Unit

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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 Projection

Inherited from (InternalRow) ⇒ InternalRow

Inherited from AnyRef

Inherited from Any

Ungrouped