Packages

c

org.apache.spark.sql.execution.window

UnboundedFollowingWindowFunctionFrame

final class UnboundedFollowingWindowFunctionFrame extends WindowFunctionFrame

The UnboundFollowing window frame calculates frames with the following SQL form: ... BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING

There is only an upper bound. This is a slightly modified version of the sliding window. The sliding window operator has to check if both upper and the lower bound change when a new row gets processed, where as the unbounded following only has to check the lower bound.

This is a very expensive operator to use, O(n * (n - 1) /2), because we need to maintain a buffer and must do full recalculation after each row. Reverse iteration would be possible, if the commutativity of the used window functions can be guaranteed.

Linear Supertypes
WindowFunctionFrame, AnyRef, Any
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  1. UnboundedFollowingWindowFunctionFrame
  2. WindowFunctionFrame
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Instance Constructors

  1. new UnboundedFollowingWindowFunctionFrame(target: InternalRow, processor: AggregateProcessor, lbound: BoundOrdering)

    target

    to write results to.

    processor

    to calculate the row values with.

    lbound

    comparator used to identify the lower bound of an output row.

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. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. def currentLowerBound(): Int

    The current lower window bound in the row array (inclusive).

    The current lower window bound in the row array (inclusive).

    This should be called after the current row is updated via write.

    Definition Classes
    UnboundedFollowingWindowFunctionFrame → WindowFunctionFrame
  7. def currentUpperBound(): Int

    The current row index of the upper window bound in the row array (exclusive)

    The current row index of the upper window bound in the row array (exclusive)

    This should be called after the current row is updated via write.

    Definition Classes
    UnboundedFollowingWindowFunctionFrame → WindowFunctionFrame
  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. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. def prepare(rows: ExternalAppendOnlyUnsafeRowArray): Unit

    Prepare the frame for calculating a new partition.

    Prepare the frame for calculating a new partition.

    rows

    to calculate the frame results for.

    Definition Classes
    UnboundedFollowingWindowFunctionFrame → WindowFunctionFrame
  18. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    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()
  23. def write(index: Int, current: InternalRow): Unit

    Write the frame columns for the current row to the given target row.

    Write the frame columns for the current row to the given target row.

    Definition Classes
    UnboundedFollowingWindowFunctionFrame → WindowFunctionFrame

Inherited from WindowFunctionFrame

Inherited from AnyRef

Inherited from Any

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