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c

org.apache.spark.sql.execution

UnsafeKVExternalSorter

final class UnsafeKVExternalSorter extends AnyRef

A class for performing external sorting on key-value records. Both key and value are UnsafeRows.

Note that this class allows optionally passing in a BytesToBytesMap directly in order to perform in-place sorting of records in the map.

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Visibility
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Instance Constructors

  1. new UnsafeKVExternalSorter(keySchema: StructType, valueSchema: StructType, blockManager: BlockManager, serializerManager: SerializerManager, pageSizeBytes: Long, numElementsForSpillThreshold: Int, map: BytesToBytesMap)
  2. new UnsafeKVExternalSorter(keySchema: StructType, valueSchema: StructType, blockManager: BlockManager, serializerManager: SerializerManager, pageSizeBytes: Long, numElementsForSpillThreshold: Int)

Type Members

  1. class KVSorterIterator extends KVIterator[UnsafeRow, UnsafeRow]

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 cleanupResources(): Unit

    Frees this sorter's in-memory data structures and cleans up its spill files.

  6. def clone(): AnyRef
    Attributes
    protected[lang]
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    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  7. final def eq(arg0: AnyRef): Boolean
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  8. def equals(arg0: AnyRef): Boolean
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  9. def finalize(): Unit
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    protected[lang]
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    @throws(classOf[java.lang.Throwable])
  10. final def getClass(): Class[_ <: AnyRef]
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    Annotations
    @native()
  11. def getPeakMemoryUsedBytes(): Long

    Return the peak memory used so far, in bytes.

  12. def getSpillSize(): Long

    Return the total number of bytes that has been spilled into disk so far.

  13. def hashCode(): Int
    Definition Classes
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    Annotations
    @native()
  14. def insertKV(key: UnsafeRow, value: UnsafeRow): Unit

    Inserts a key-value record into the sorter.

    Inserts a key-value record into the sorter. If the sorter no longer has enough memory to hold the record, the sorter sorts the existing records in-memory, writes them out as partially sorted runs, and then reallocates memory to hold the new record.

  15. final def isInstanceOf[T0]: Boolean
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  16. def merge(other: UnsafeKVExternalSorter): Unit

    Merges another UnsafeKVExternalSorter into this, the other one will be emptied.

    Merges another UnsafeKVExternalSorter into this, the other one will be emptied.

    Exceptions thrown
  17. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  18. final def notify(): Unit
    Definition Classes
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    @native()
  19. final def notifyAll(): Unit
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    @native()
  20. def sortedIterator(): KVSorterIterator

    Returns a sorted iterator.

    Returns a sorted iterator. It is the caller's responsibility to call cleanupResources() after consuming this iterator.

  21. final def synchronized[T0](arg0: => T0): T0
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  22. def toString(): String
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  23. final def wait(): Unit
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    @throws(classOf[java.lang.InterruptedException])
  24. final def wait(arg0: Long, arg1: Int): Unit
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    @throws(classOf[java.lang.InterruptedException])
  25. final def wait(arg0: Long): Unit
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    @throws(classOf[java.lang.InterruptedException]) @native()

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