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com.nvidia.spark.rapids.window

GpuBatchedRunningWindowWithFixer

trait GpuBatchedRunningWindowWithFixer extends AnyRef

For many operations a running window (unbounded preceding to current row) can process the data without dividing the data up into batches that contain all of the data for a given group by key set. Instead we store a small amount of state from a previous result and use it to fix the final result. This is a memory optimization.

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Known Subclasses
GpuDenseRank, GpuRank, GpuRowNumber, GpuBasicDecimalSum, GpuBasicMax, GpuBasicMin, GpuBasicSum, GpuCount, GpuDecimal128Sum, GpuDecimalSum, GpuFirst, GpuFloatMax, GpuFloatMin, GpuLast, GpuMax, GpuMin, GpuNthValue, GpuSum
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Abstract Value Members

  1. abstract def newFixer(): BatchedRunningWindowFixer

    Get a new class that can be used to fix up batched running window operations.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def canFixUp: Boolean

    Checks whether the running window can be fixed up.

    Checks whether the running window can be fixed up. This should be called before newFixer(), to check whether the fixer would work.

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