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c

org.apache.spark.sql.execution

UnsafeFixedWidthAggregationMap

final class UnsafeFixedWidthAggregationMap extends AnyRef

Unsafe-based HashMap for performing aggregations where the aggregated values are fixed-width.

This map supports a maximum of 2 billion keys.

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Instance Constructors

  1. new UnsafeFixedWidthAggregationMap(emptyAggregationBuffer: InternalRow, aggregationBufferSchema: StructType, groupingKeySchema: StructType, taskContext: TaskContext, initialCapacity: Int, pageSizeBytes: Long)

Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    @throws( ... ) @native()
  6. def destructAndCreateExternalSorter(): UnsafeKVExternalSorter

    Sorts the map's records in place, spill them to disk, and returns an UnsafeKVExternalSorter

    Sorts the map's records in place, spill them to disk, and returns an UnsafeKVExternalSorter

    Note that the map will be reset for inserting new records, and the returned sorter can NOT be used to insert records.

  7. final def eq(arg0: AnyRef): Boolean
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  8. def equals(arg0: Any): Boolean
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  9. def finalize(): Unit
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    @throws( classOf[java.lang.Throwable] )
  10. def free(): Unit

    Free the memory associated with this map.

    Free the memory associated with this map. This is idempotent and can be called multiple times.

  11. def getAggregationBuffer(groupingKey: InternalRow): UnsafeRow

    Return the aggregation buffer for the current group.

    Return the aggregation buffer for the current group. For efficiency, all calls to this method return the same object. If additional memory could not be allocated, then this method will signal an error by returning null.

  12. def getAggregationBufferFromUnsafeRow(key: UnsafeRow, hash: Int): UnsafeRow
  13. def getAggregationBufferFromUnsafeRow(key: UnsafeRow): UnsafeRow
  14. def getAvgHashProbeBucketListIterations(): Double

    Gets the average bucket list iterations per lookup in the underlying BytesToBytesMap.

  15. final def getClass(): Class[_]
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    @native()
  16. def getPeakMemoryUsedBytes(): Long

    Return the peak memory used so far, in bytes.

  17. def hashCode(): Int
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  18. final def isInstanceOf[T0]: Boolean
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  19. def iterator(): KVIterator[UnsafeRow, UnsafeRow]

    Returns an iterator over the keys and values in this map.

    Returns an iterator over the keys and values in this map. This uses destructive iterator of BytesToBytesMap. So it is illegal to call any other method on this map after iterator() has been called.

    For efficiency, each call returns the same object.

  20. final def ne(arg0: AnyRef): Boolean
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  21. final def notify(): Unit
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  22. final def notifyAll(): Unit
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  23. final def synchronized[T0](arg0: ⇒ T0): T0
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  24. def toString(): String
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  25. final def wait(): Unit
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    @throws( ... )
  26. final def wait(arg0: Long, arg1: Int): Unit
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    @throws( ... )
  27. final def wait(arg0: Long): Unit
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