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org.apache.spark.sql.execution.aggregate

MergingSessionsIterator

class MergingSessionsIterator extends AggregationIterator

This is a variant of SortAggregateIterator which merges the session windows based on the fact input rows are sorted by "group keys + the start time of session window".

When merging windows, it also applies aggregations on merged window, which eliminates the necessity on buffering inputs (which requires copying rows) and update the session spec for each input.

Linear Supertypes
AggregationIterator, Logging, Iterator[UnsafeRow], IterableOnceOps[UnsafeRow, Iterator, Iterator[UnsafeRow]], IterableOnce[UnsafeRow], AnyRef, Any
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Inherited
  1. MergingSessionsIterator
  2. AggregationIterator
  3. Logging
  4. Iterator
  5. IterableOnceOps
  6. IterableOnce
  7. AnyRef
  8. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new MergingSessionsIterator(partIndex: Int, groupingExpressions: Seq[NamedExpression], sessionExpression: NamedExpression, valueAttributes: Seq[Attribute], inputIterator: Iterator[InternalRow], aggregateExpressions: Seq[AggregateExpression], aggregateAttributes: Seq[Attribute], initialInputBufferOffset: Int, resultExpressions: Seq[NamedExpression], newMutableProjection: (Seq[Expression], Seq[Attribute]) => MutableProjection, numOutputRows: SQLMetric)

Type Members

  1. class GroupedIterator[B >: A] extends AbstractIterator[Seq[B]]
    Definition Classes
    Iterator

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ++[B >: UnsafeRow](xs: => IterableOnce[B]): Iterator[B]
    Definition Classes
    Iterator
    Annotations
    @inline()
  4. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. final def addString(b: StringBuilder): StringBuilder
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  6. final def addString(b: StringBuilder, sep: String): StringBuilder
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  7. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder
    Definition Classes
    IterableOnceOps
  8. val aggregateFunctions: Array[AggregateFunction]
    Attributes
    protected
    Definition Classes
    AggregationIterator
  9. val allImperativeAggregateFunctionPositions: Array[Int]
    Attributes
    protected[this]
    Definition Classes
    AggregationIterator
  10. val allImperativeAggregateFunctions: Array[ImperativeAggregate]
    Attributes
    protected[this]
    Definition Classes
    AggregationIterator
  11. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  12. def buffered: BufferedIterator[UnsafeRow]
    Definition Classes
    Iterator
  13. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  14. def collect[B](pf: PartialFunction[UnsafeRow, B]): Iterator[B]
    Definition Classes
    Iterator → IterableOnceOps
  15. def collectFirst[B](pf: PartialFunction[UnsafeRow, B]): Option[B]
    Definition Classes
    IterableOnceOps
  16. def concat[B >: UnsafeRow](xs: => IterableOnce[B]): Iterator[B]
    Definition Classes
    Iterator
  17. def contains(elem: Any): Boolean
    Definition Classes
    Iterator
  18. def copyToArray[B >: UnsafeRow](xs: Array[B], start: Int, len: Int): Int
    Definition Classes
    IterableOnceOps
  19. def copyToArray[B >: UnsafeRow](xs: Array[B], start: Int): Int
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding("This should always forward to the 3-arg version of this method", "2.13.4")
  20. def copyToArray[B >: UnsafeRow](xs: Array[B]): Int
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding("This should always forward to the 3-arg version of this method", "2.13.4")
  21. def corresponds[B](that: IterableOnce[B])(p: (UnsafeRow, B) => Boolean): Boolean
    Definition Classes
    IterableOnceOps
  22. def count(p: (UnsafeRow) => Boolean): Int
    Definition Classes
    IterableOnceOps
  23. def distinct: Iterator[UnsafeRow]
    Definition Classes
    Iterator
  24. def distinctBy[B](f: (UnsafeRow) => B): Iterator[UnsafeRow]
    Definition Classes
    Iterator
  25. def drop(n: Int): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  26. def dropWhile(p: (UnsafeRow) => Boolean): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  27. def duplicate: (Iterator[UnsafeRow], Iterator[UnsafeRow])
    Definition Classes
    Iterator
  28. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  29. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  30. def exists(p: (UnsafeRow) => Boolean): Boolean
    Definition Classes
    IterableOnceOps
  31. val expressionAggInitialProjection: MutableProjection
    Attributes
    protected[this]
    Definition Classes
    AggregationIterator
  32. def filter(p: (UnsafeRow) => Boolean): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  33. def filterNot(p: (UnsafeRow) => Boolean): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  34. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  35. def find(p: (UnsafeRow) => Boolean): Option[UnsafeRow]
    Definition Classes
    IterableOnceOps
  36. def flatMap[B](f: (UnsafeRow) => IterableOnce[B]): Iterator[B]
    Definition Classes
    Iterator → IterableOnceOps
  37. def flatten[B](implicit ev: (UnsafeRow) => IterableOnce[B]): Iterator[B]
    Definition Classes
    Iterator → IterableOnceOps
  38. def fold[A1 >: UnsafeRow](z: A1)(op: (A1, A1) => A1): A1
    Definition Classes
    IterableOnceOps
  39. def foldLeft[B](z: B)(op: (B, UnsafeRow) => B): B
    Definition Classes
    IterableOnceOps
  40. def foldRight[B](z: B)(op: (UnsafeRow, B) => B): B
    Definition Classes
    IterableOnceOps
  41. def forall(p: (UnsafeRow) => Boolean): Boolean
    Definition Classes
    IterableOnceOps
  42. def foreach[U](f: (UnsafeRow) => U): Unit
    Definition Classes
    IterableOnceOps
  43. val generateOutput: (UnsafeRow, InternalRow) => UnsafeRow
    Attributes
    protected
    Definition Classes
    AggregationIterator
  44. def generateProcessRow(expressions: Seq[AggregateExpression], functions: Seq[AggregateFunction], inputAttributes: Seq[Attribute]): (InternalRow, InternalRow) => Unit
    Attributes
    protected
    Definition Classes
    AggregationIterator
  45. def generateResultProjection(): (UnsafeRow, InternalRow) => UnsafeRow
    Attributes
    protected
    Definition Classes
    AggregationIterator
  46. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  47. def grouped[B >: UnsafeRow](size: Int): GroupedIterator[B]
    Definition Classes
    Iterator
  48. val groupingAttributes: Seq[Attribute]
    Attributes
    protected
    Definition Classes
    AggregationIterator
  49. val groupingProjection: UnsafeProjection
    Attributes
    protected
    Definition Classes
    AggregationIterator
  50. val groupingWithoutSession: Seq[NamedExpression]
  51. val groupingWithoutSessionAttributes: Seq[Attribute]
  52. final def hasNext: Boolean
    Definition Classes
    MergingSessionsIterator → Iterator
  53. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  54. def indexOf[B >: UnsafeRow](elem: B, from: Int): Int
    Definition Classes
    Iterator
  55. def indexOf[B >: UnsafeRow](elem: B): Int
    Definition Classes
    Iterator
  56. def indexWhere(p: (UnsafeRow) => Boolean, from: Int): Int
    Definition Classes
    Iterator
  57. def initialize(): Unit
    Attributes
    protected
  58. def initializeAggregateFunctions(expressions: Seq[AggregateExpression], startingInputBufferOffset: Int): Array[AggregateFunction]
    Attributes
    protected
    Definition Classes
    AggregationIterator
  59. def initializeBuffer(buffer: InternalRow): Unit

    Initializes buffer values for all aggregate functions.

    Initializes buffer values for all aggregate functions.

    Attributes
    protected
    Definition Classes
    AggregationIterator
  60. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  61. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  62. def isEmpty: Boolean
    Definition Classes
    Iterator → IterableOnceOps
    Annotations
    @deprecatedOverriding("isEmpty is defined as !hasNext; override hasNext instead", "2.13.0")
  63. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  64. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  65. def isTraversableAgain: Boolean
    Definition Classes
    IterableOnceOps
  66. final def iterator: Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnce
    Annotations
    @inline()
  67. def knownSize: Int
    Definition Classes
    IterableOnce
  68. final def length: Int
    Definition Classes
    Iterator
    Annotations
    @inline()
  69. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  70. def logDebug(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  71. def logDebug(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  72. def logError(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  73. def logError(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  74. def logInfo(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  75. def logInfo(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  76. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  77. def logTrace(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  78. def logTrace(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  79. def logWarning(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  80. def logWarning(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  81. def map[B](f: (UnsafeRow) => B): Iterator[B]
    Definition Classes
    Iterator → IterableOnceOps
  82. def max[B >: UnsafeRow](implicit ord: Ordering[B]): UnsafeRow
    Definition Classes
    IterableOnceOps
  83. def maxBy[B](f: (UnsafeRow) => B)(implicit cmp: Ordering[B]): UnsafeRow
    Definition Classes
    IterableOnceOps
  84. def maxByOption[B](f: (UnsafeRow) => B)(implicit cmp: Ordering[B]): Option[UnsafeRow]
    Definition Classes
    IterableOnceOps
  85. def maxOption[B >: UnsafeRow](implicit ord: Ordering[B]): Option[UnsafeRow]
    Definition Classes
    IterableOnceOps
  86. def min[B >: UnsafeRow](implicit ord: Ordering[B]): UnsafeRow
    Definition Classes
    IterableOnceOps
  87. def minBy[B](f: (UnsafeRow) => B)(implicit cmp: Ordering[B]): UnsafeRow
    Definition Classes
    IterableOnceOps
  88. def minByOption[B](f: (UnsafeRow) => B)(implicit cmp: Ordering[B]): Option[UnsafeRow]
    Definition Classes
    IterableOnceOps
  89. def minOption[B >: UnsafeRow](implicit ord: Ordering[B]): Option[UnsafeRow]
    Definition Classes
    IterableOnceOps
  90. final def mkString: String
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  91. final def mkString(sep: String): String
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  92. final def mkString(start: String, sep: String, end: String): String
    Definition Classes
    IterableOnceOps
  93. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  94. final def next(): UnsafeRow
    Definition Classes
    MergingSessionsIterator → Iterator
  95. def nextOption(): Option[UnsafeRow]
    Definition Classes
    Iterator
  96. def nonEmpty: Boolean
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecatedOverriding("nonEmpty is defined as !isEmpty; override isEmpty instead", "2.13.0")
  97. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  98. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  99. def outputForEmptyGroupingKeyWithoutInput(): UnsafeRow
  100. def padTo[B >: UnsafeRow](len: Int, elem: B): Iterator[B]
    Definition Classes
    Iterator
  101. def partition(p: (UnsafeRow) => Boolean): (Iterator[UnsafeRow], Iterator[UnsafeRow])
    Definition Classes
    Iterator
  102. def patch[B >: UnsafeRow](from: Int, patchElems: Iterator[B], replaced: Int): Iterator[B]
    Definition Classes
    Iterator
  103. def processCurrentSortedGroup(): Unit

    Processes rows in the current group.

    Processes rows in the current group. It will stop when it find a new group.

    Attributes
    protected
  104. val processRow: (InternalRow, InternalRow) => Unit
    Attributes
    protected
    Definition Classes
    AggregationIterator
  105. def product[B >: UnsafeRow](implicit num: Numeric[B]): B
    Definition Classes
    IterableOnceOps
  106. def reduce[B >: UnsafeRow](op: (B, B) => B): B
    Definition Classes
    IterableOnceOps
  107. def reduceLeft[B >: UnsafeRow](op: (B, UnsafeRow) => B): B
    Definition Classes
    IterableOnceOps
  108. def reduceLeftOption[B >: UnsafeRow](op: (B, UnsafeRow) => B): Option[B]
    Definition Classes
    IterableOnceOps
  109. def reduceOption[B >: UnsafeRow](op: (B, B) => B): Option[B]
    Definition Classes
    IterableOnceOps
  110. def reduceRight[B >: UnsafeRow](op: (UnsafeRow, B) => B): B
    Definition Classes
    IterableOnceOps
  111. def reduceRightOption[B >: UnsafeRow](op: (UnsafeRow, B) => B): Option[B]
    Definition Classes
    IterableOnceOps
  112. def reversed: Iterable[UnsafeRow]
    Attributes
    protected
    Definition Classes
    IterableOnceOps
  113. def sameElements[B >: UnsafeRow](that: IterableOnce[B]): Boolean
    Definition Classes
    Iterator
  114. def scanLeft[B](z: B)(op: (B, UnsafeRow) => B): Iterator[B]
    Definition Classes
    Iterator → IterableOnceOps
  115. def size: Int
    Definition Classes
    IterableOnceOps
  116. def slice(from: Int, until: Int): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  117. def sliceIterator(from: Int, until: Int): Iterator[UnsafeRow]
    Attributes
    protected
    Definition Classes
    Iterator
  118. def sliding[B >: UnsafeRow](size: Int, step: Int): GroupedIterator[B]
    Definition Classes
    Iterator
  119. def span(p: (UnsafeRow) => Boolean): (Iterator[UnsafeRow], Iterator[UnsafeRow])
    Definition Classes
    Iterator → IterableOnceOps
  120. def splitAt(n: Int): (Iterator[UnsafeRow], Iterator[UnsafeRow])
    Definition Classes
    IterableOnceOps
  121. def stepper[S <: Stepper[_]](implicit shape: StepperShape[UnsafeRow, S]): S
    Definition Classes
    IterableOnce
  122. def sum[B >: UnsafeRow](implicit num: Numeric[B]): B
    Definition Classes
    IterableOnceOps
  123. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  124. def take(n: Int): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  125. def takeWhile(p: (UnsafeRow) => Boolean): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  126. def tapEach[U](f: (UnsafeRow) => U): Iterator[UnsafeRow]
    Definition Classes
    Iterator → IterableOnceOps
  127. def to[C1](factory: Factory[UnsafeRow, C1]): C1
    Definition Classes
    IterableOnceOps
  128. def toArray[B >: UnsafeRow](implicit arg0: ClassTag[B]): Array[B]
    Definition Classes
    IterableOnceOps
  129. final def toBuffer[B >: UnsafeRow]: Buffer[B]
    Definition Classes
    IterableOnceOps
    Annotations
    @inline()
  130. def toIndexedSeq: IndexedSeq[UnsafeRow]
    Definition Classes
    IterableOnceOps
  131. def toList: List[UnsafeRow]
    Definition Classes
    IterableOnceOps
  132. def toMap[K, V](implicit ev: <:<[UnsafeRow, (K, V)]): Map[K, V]
    Definition Classes
    IterableOnceOps
  133. def toSeq: Seq[UnsafeRow]
    Definition Classes
    IterableOnceOps
  134. def toSet[B >: UnsafeRow]: Set[B]
    Definition Classes
    IterableOnceOps
  135. def toString(): String
    Definition Classes
    Iterator → AnyRef → Any
  136. def toVector: Vector[UnsafeRow]
    Definition Classes
    IterableOnceOps
  137. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  138. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  139. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  140. def withFilter(p: (UnsafeRow) => Boolean): Iterator[UnsafeRow]
    Definition Classes
    Iterator
  141. def zip[B](that: IterableOnce[B]): Iterator[(UnsafeRow, B)]
    Definition Classes
    Iterator
  142. def zipAll[A1 >: UnsafeRow, B](that: IterableOnce[B], thisElem: A1, thatElem: B): Iterator[(A1, B)]
    Definition Classes
    Iterator
  143. def zipWithIndex: Iterator[(UnsafeRow, Int)]
    Definition Classes
    Iterator → IterableOnceOps

Deprecated Value Members

  1. final def /:[B](z: B)(op: (B, UnsafeRow) => B): B
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use foldLeft instead of /:

  2. final def :\[B](z: B)(op: (UnsafeRow, B) => B): B
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use foldRight instead of :\

  3. def aggregate[B](z: => B)(seqop: (B, UnsafeRow) => B, combop: (B, B) => B): B
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) aggregate is not relevant for sequential collections. Use foldLeft(z)(seqop) instead.

  4. final def copyToBuffer[B >: UnsafeRow](dest: Buffer[B]): Unit
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use dest ++= coll instead

  5. final def hasDefiniteSize: Boolean
    Definition Classes
    Iterator → IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) hasDefiniteSize on Iterator is the same as isEmpty

  6. def scanRight[B](z: B)(op: (UnsafeRow, B) => B): Iterator[B]
    Definition Classes
    Iterator
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Call scanRight on an Iterable instead.

  7. def seq: MergingSessionsIterator.this.type
    Definition Classes
    Iterator
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Iterator.seq always returns the iterator itself

  8. final def toIterator: Iterator[UnsafeRow]
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .iterator instead of .toIterator

  9. final def toStream: Stream[UnsafeRow]
    Definition Classes
    IterableOnceOps
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.13.0) Use .to(LazyList) instead of .toStream

Inherited from AggregationIterator

Inherited from Logging

Inherited from Iterator[UnsafeRow]

Inherited from IterableOnceOps[UnsafeRow, Iterator, Iterator[UnsafeRow]]

Inherited from IterableOnce[UnsafeRow]

Inherited from AnyRef

Inherited from Any

Ungrouped