org.apache.spark.sql.execution.aggregate

SortBasedAggregator

class SortBasedAggregator extends AnyRef

A class used to handle sort-based aggregation, used together with ObjectHashAggregateExec.

To do

Try to eliminate this class by refactor and reuse code paths in SortAggregateExec.

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Instance Constructors

  1. new SortBasedAggregator(initialAggBufferIterator: KVIterator[UnsafeRow, UnsafeRow], inputSchema: StructType, groupingSchema: StructType, processRow: (InternalRow, InternalRow) ⇒ Unit, mergeAggregationBuffers: (InternalRow, InternalRow) ⇒ Unit, makeEmptyAggregationBuffer: ⇒ InternalRow)

    initialAggBufferIterator

    iterator that points to sorted input aggregation buffers

    inputSchema

    The schema of input row

    groupingSchema

    The schema of grouping key

    processRow

    Function to update the aggregation buffer with input rows

    mergeAggregationBuffers

    Function used to merge the input aggregation buffers into existing aggregation buffers

    makeEmptyAggregationBuffer

    Creates an empty aggregation buffer

Value Members

  1. final def !=(arg0: AnyRef): Boolean

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  2. final def !=(arg0: Any): Boolean

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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  5. final def ==(arg0: Any): Boolean

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  6. def addInput(groupingKey: UnsafeRow, inputRow: UnsafeRow): Unit

  7. final def asInstanceOf[T0]: T0

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  8. def clone(): AnyRef

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  9. def destructiveIterator(): Iterator[AggregationBufferEntry]

    Returns a destructive iterator of AggregationBufferEntry.

    Returns a destructive iterator of AggregationBufferEntry. Notice: it is illegal to call any method after destructiveIterator() has been called.

  10. final def eq(arg0: AnyRef): Boolean

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  11. def equals(arg0: Any): Boolean

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  12. def finalize(): Unit

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  13. final def getClass(): Class[_]

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  16. final def ne(arg0: AnyRef): Boolean

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  17. final def notify(): Unit

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  18. final def notifyAll(): Unit

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  19. final def synchronized[T0](arg0: ⇒ T0): T0

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  20. def toString(): String

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  21. final def wait(): Unit

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  22. final def wait(arg0: Long, arg1: Int): Unit

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