Packages

abstract class MutableProjection extends Projection

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
InterpretedMutableProjection, BaseMutableProjection
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Inherited
  1. MutableProjection
  2. Projection
  3. Function1
  4. AnyRef
  5. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new MutableProjection()

Abstract Value Members

  1. abstract def apply(v1: InternalRow): InternalRow
    Definition Classes
    Function1
  2. abstract def currentValue: InternalRow
  3. abstract def target(row: InternalRow): MutableProjection

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

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def andThen[A](g: (InternalRow) ⇒ A): (InternalRow) ⇒ A
    Definition Classes
    Function1
    Annotations
    @unspecialized()
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  7. def compose[A](g: (A) ⇒ InternalRow): (A) ⇒ InternalRow
    Definition Classes
    Function1
    Annotations
    @unspecialized()
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. 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
  14. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  15. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    Function1 → AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Projection

Inherited from (InternalRow) ⇒ InternalRow

Inherited from AnyRef

Inherited from Any

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