Packages

case class GpuVariancePop(child: Expression, nullOnDivideByZero: Boolean) extends GpuM2 with Product with Serializable

Linear Supertypes
GpuM2, Serializable, Serializable, ImplicitCastInputTypes, ExpectsInputTypes, GpuAggregateFunction, GpuUnevaluable, ShimExpression, GpuExpression, Expression, TreeNode[Expression], TreePatternBits, Product, Equals, AnyRef, Any
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Inherited
  1. GpuVariancePop
  2. GpuM2
  3. Serializable
  4. Serializable
  5. ImplicitCastInputTypes
  6. ExpectsInputTypes
  7. GpuAggregateFunction
  8. GpuUnevaluable
  9. ShimExpression
  10. GpuExpression
  11. Expression
  12. TreeNode
  13. TreePatternBits
  14. Product
  15. Equals
  16. AnyRef
  17. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new GpuVariancePop(child: Expression, nullOnDivideByZero: Boolean)

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. lazy val aggBufferAttributes: Seq[AttributeReference]

    This is the contract with the outside world.

    This is the contract with the outside world. It describes what the output of postUpdate should look like, and what the input to preMerge looks like. It also describes what the output of postMerge must look like.

    Definition Classes
    GpuM2 → GpuAggregateFunction
  5. def apply(number: Int): TreeNode[_]
    Definition Classes
    TreeNode
  6. def argString(maxFields: Int): String
    Definition Classes
    TreeNode
  7. def asCode: String
    Definition Classes
    TreeNode
  8. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  9. lazy val bufferAvg: AttributeReference
    Attributes
    protected
    Definition Classes
    GpuM2
  10. lazy val bufferM2: AttributeReference
    Attributes
    protected
    Definition Classes
    GpuM2
  11. lazy val bufferN: AttributeReference
    Attributes
    protected
    Definition Classes
    GpuM2
  12. lazy val canonicalized: Expression
    Definition Classes
    GpuExpression → Expression
  13. def checkInputDataTypes(): TypeCheckResult
    Definition Classes
    ExpectsInputTypes → Expression
  14. val child: Expression
  15. def children: Seq[Expression]
    Definition Classes
    GpuM2 → TreeNode
  16. def childrenResolved: Boolean
    Definition Classes
    Expression
  17. def clone(): Expression
    Definition Classes
    TreeNode → AnyRef
  18. def collect[B](pf: PartialFunction[Expression, B]): Seq[B]
    Definition Classes
    TreeNode
  19. def collectFirst[B](pf: PartialFunction[Expression, B]): Option[B]
    Definition Classes
    TreeNode
  20. def collectLeaves(): Seq[Expression]
    Definition Classes
    TreeNode
  21. final def columnarEval(batch: ColumnarBatch): GpuColumnVector

    Returns the result of evaluating this expression on the entire ColumnarBatch.

    Returns the result of evaluating this expression on the entire ColumnarBatch. The result of calling this is a GpuColumnVector.

    By convention any GpuColumnVector returned by columnarEval is owned by the caller and will need to be closed by them. This can happen by putting it into a ColumnarBatch and closing the batch or by closing the vector directly if it is a temporary value.

    Definition Classes
    GpuUnevaluable → GpuExpression
  22. final def columnarEvalAny(batch: ColumnarBatch): Any

    Returns the result of evaluating this expression on the entire ColumnarBatch.

    Returns the result of evaluating this expression on the entire ColumnarBatch. The result of calling this may be a single GpuColumnVector or a scalar value. Scalar values typically happen if they are a part of the expression i.e. col("a") + 100. In this case the 100 is a literal that Add would have to be able to handle.

    By convention any AutoCloseable returned by columnarEvalAny is owned by the caller and will need to be closed by them.

    Definition Classes
    GpuUnevaluable → GpuExpression
  23. final def containsAllPatterns(patterns: TreePattern*): Boolean
    Definition Classes
    TreePatternBits
  24. final def containsAnyPattern(patterns: TreePattern*): Boolean
    Definition Classes
    TreePatternBits
  25. lazy val containsChild: Set[TreeNode[_]]
    Definition Classes
    TreeNode
  26. final def containsPattern(t: TreePattern): Boolean
    Definition Classes
    TreePatternBits
    Annotations
    @inline()
  27. def convertToAst(numFirstTableColumns: Int): AstExpression

    Build an equivalent representation of this expression in a cudf AST.

    Build an equivalent representation of this expression in a cudf AST.

    numFirstTableColumns

    number of columns in the leftmost input table. Spark places the columns of all inputs in a single sequence, while cudf AST uses an explicit table reference to make column indices unique. This parameter helps translate input column references from Spark's single sequence into cudf's separate sequences.

    returns

    top node of the equivalent AST

    Definition Classes
    GpuExpression
  28. def copyTagsFrom(other: Expression): Unit
    Definition Classes
    TreeNode
  29. lazy val cudfCountN: CudfAggregate
    Definition Classes
    GpuM2
  30. lazy val cudfM2: CudfM2
    Definition Classes
    GpuM2
  31. lazy val cudfMean: CudfMean
    Definition Classes
    GpuM2
  32. def dataType: DataType
    Definition Classes
    GpuM2 → Expression
  33. lazy val deterministic: Boolean
    Definition Classes
    Expression
  34. def disableCoalesceUntilInput(): Boolean

    Override this if your expression cannot allow combining of data from multiple files into a single batch before it operates on them.

    Override this if your expression cannot allow combining of data from multiple files into a single batch before it operates on them. These are for things like getting the input file name. Which for spark is stored in a thread local variable which means we have to jump through some hoops to make this work.

    Definition Classes
    GpuExpression
  35. def disableTieredProjectCombine: Boolean

    If this returns true then tiered project will stop looking to combine expressions when this is seen.

    If this returns true then tiered project will stop looking to combine expressions when this is seen.

    Definition Classes
    GpuExpression
  36. def divideByZeroEvalResult: Expression
    Attributes
    protected
    Definition Classes
    GpuM2
  37. final def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode
    Definition Classes
    GpuExpression → Expression
  38. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  39. final def eval(input: InternalRow = null): Any
    Definition Classes
    GpuExpression → Expression
  40. lazy val evaluateExpression: Expression

    This takes the output of postMerge computes the final result of the aggregation.

    This takes the output of postMerge computes the final result of the aggregation.

    Definition Classes
    GpuVariancePop → GpuAggregateFunction
    Note

    evaluateExpression is bound to aggBufferAttributes, so the references used in evaluateExpression must also be used in aggBufferAttributes.

  41. def fastEquals(other: TreeNode[_]): Boolean
    Definition Classes
    TreeNode
  42. def filteredInputProjection(filter: Expression): Seq[Expression]
    Definition Classes
    GpuAggregateFunction
  43. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  44. def find(f: (Expression) ⇒ Boolean): Option[Expression]
    Definition Classes
    TreeNode
  45. def flatArguments: Iterator[Any]
    Attributes
    protected
    Definition Classes
    Expression
  46. def flatMap[A](f: (Expression) ⇒ TraversableOnce[A]): Seq[A]
    Definition Classes
    TreeNode
  47. final def foldable: Boolean

    An aggregate function is not foldable.

    An aggregate function is not foldable.

    Definition Classes
    GpuAggregateFunction → Expression
  48. def foreach(f: (Expression) ⇒ Unit): Unit
    Definition Classes
    TreeNode
  49. def foreachUp(f: (Expression) ⇒ Unit): Unit
    Definition Classes
    TreeNode
  50. def genCode(ctx: CodegenContext): ExprCode
    Definition Classes
    Expression
  51. def generateTreeString(depth: Int, lastChildren: Seq[Boolean], append: (String) ⇒ Unit, verbose: Boolean, prefix: String, addSuffix: Boolean, maxFields: Int, printNodeId: Boolean, indent: Int): Unit
    Definition Classes
    TreeNode
  52. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  53. def getDefaultTreePatternBits: BitSet
    Attributes
    protected
    Definition Classes
    TreeNode
  54. def getTagValue[T](tag: TreeNodeTag[T]): Option[T]
    Definition Classes
    TreeNode
  55. def hasSideEffects: Boolean

    Could evaluating this expression cause side-effects, such as throwing an exception?

    Could evaluating this expression cause side-effects, such as throwing an exception?

    Definition Classes
    GpuExpression
  56. def hashCode(): Int
    Definition Classes
    TreeNode → AnyRef → Any
  57. lazy val initialValues: Seq[GpuLiteral]

    These are values that spark calls initial because it uses them to initialize the aggregation buffer, and returns them in case of an empty aggregate when there are no expressions.

    These are values that spark calls initial because it uses them to initialize the aggregation buffer, and returns them in case of an empty aggregate when there are no expressions.

    In our case they are only used in a very specific case: the empty input reduction case. In this case we don't have input to reduce, but we do have reduction functions, so each reduction function's initialValues is invoked to populate a single row of output.

    Definition Classes
    GpuM2 → GpuAggregateFunction
  58. def innerChildren: Seq[TreeNode[_]]
    Definition Classes
    TreeNode
  59. lazy val inputProjection: Seq[Expression]

    Using the child reference, define the shape of input batches sent to the update expressions

    Using the child reference, define the shape of input batches sent to the update expressions

    Definition Classes
    GpuM2 → GpuAggregateFunction
    Note

    this can be thought of as "pre" update: as update consumes its output in order

  60. def inputTypes: Seq[AbstractDataType]
    Definition Classes
    GpuM2 → ExpectsInputTypes
  61. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  62. def isRuleIneffective(ruleId: RuleId): Boolean
    Attributes
    protected
    Definition Classes
    TreeNode
  63. def jsonFields: List[JField]
    Attributes
    protected
    Definition Classes
    TreeNode
  64. final def legacyWithNewChildren(newChildren: Seq[Expression]): Expression
    Attributes
    protected
    Definition Classes
    TreeNode
  65. def makeCopy(newArgs: Array[AnyRef]): Expression
    Definition Classes
    TreeNode
  66. def map[A](f: (Expression) ⇒ A): Seq[A]
    Definition Classes
    TreeNode
  67. def mapChildren(f: (Expression) ⇒ Expression): Expression
    Definition Classes
    TreeNode
  68. def mapProductIterator[B](f: (Any) ⇒ B)(implicit arg0: ClassTag[B]): Array[B]
    Attributes
    protected
    Definition Classes
    TreeNode
  69. def markRuleAsIneffective(ruleId: RuleId): Unit
    Attributes
    protected
    Definition Classes
    TreeNode
  70. lazy val mergeAggregates: Seq[CudfAggregate]

    merge: second half of the aggregation.

    merge: second half of the aggregation. Also used to merge multiple batches in the update or merge stages. These cuDF aggregates consume the output of preMerge. The sequence of CudfAggregate must match the shape of aggBufferAttributes, and care must be taken to ensure that each cuDF aggregate is able to work with the corresponding input (i.e. aggBufferAttributes[i] is the input to mergeAggregates[i]). If a transformation is required, preMerge can be used to mutate the batches before they arrive at mergeAggregates.

    Definition Classes
    GpuM2 → GpuAggregateFunction
  71. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  72. def nodeName: String
    Definition Classes
    TreeNode
  73. val nodePatterns: Seq[TreePattern]
    Attributes
    protected
    Definition Classes
    TreeNode
  74. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  75. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  76. val nullOnDivideByZero: Boolean
  77. def nullable: Boolean
    Definition Classes
    GpuM2 → Expression
  78. def numberedTreeString: String
    Definition Classes
    TreeNode
  79. val origin: Origin
    Definition Classes
    TreeNode
  80. def otherCopyArgs: Seq[AnyRef]
    Attributes
    protected
    Definition Classes
    TreeNode
  81. def p(number: Int): Expression
    Definition Classes
    TreeNode
  82. lazy val postMerge: Seq[Expression]
    Definition Classes
    GpuM2 → GpuAggregateFunction
  83. final lazy val postMergeAttr: Seq[AttributeReference]

    This is the last aggregation step, which optionally changes the result of the mergeAggregate.

    This is the last aggregation step, which optionally changes the result of the mergeAggregate. postMergeAttr: matches the order (and types) of mergeAggregates postMerge: binds to postMergeAttr and defines an expression that results in what Spark expects from the merge. We set this to postMergeAttr by default, for the pass through case (like in postUpdate). GpuM2 is the exception, where postMerge mutates the result of the mergeAggregates to output what Spark expects.

    Definition Classes
    GpuAggregateFunction
  84. lazy val postUpdate: Seq[Expression]
    Definition Classes
    GpuM2 → GpuAggregateFunction
  85. final lazy val postUpdateAttr: Seq[AttributeReference]

    This is the last step in the update phase.

    This is the last step in the update phase. It can optionally modify the result of the cuDF update aggregates, or be a pass-through. postUpdateAttr: matches the order (and types) of updateAggregates postUpdate: binds to postUpdateAttr and defines an expression that results in what Spark expects from the update. By default this is postUpdateAttr, as it should match the shape of the Spark agg buffer leaving cuDF, but in the M2 and Count cases we overwrite it, because the cuDF shape isn't what Spark expects.

    Definition Classes
    GpuAggregateFunction
  86. lazy val preMerge: Seq[Expression]

    This step is the first step into the merge phase.

    This step is the first step into the merge phase. It can optionally modify the result of the postUpdate before it goes into the cuDF merge aggregation. preMerge: modify a partial batch to match the input required by a merge aggregate

    This always binds to aggBufferAttributes as that is the inbound schema for this aggregate from Spark. If it is set to aggBufferAttributes by default so the bind behaves like a pass through in most cases.

    Definition Classes
    GpuM2 → GpuAggregateFunction
  87. def prettyJson: String
    Definition Classes
    TreeNode
  88. def prettyName: String
    Definition Classes
    GpuVariancePop → Expression
  89. def references: AttributeSet
    Definition Classes
    Expression
  90. lazy val resolved: Boolean
    Definition Classes
    Expression
  91. lazy val retryable: Boolean

    true means this expression can be used inside a retry block, otherwise false.

    true means this expression can be used inside a retry block, otherwise false. An expression is retryable when

    • it is deterministic, or
    • when being non-deterministic, it is a Retryable and its children are all retryable.
    Definition Classes
    GpuExpression
  92. val selfNonDeterministic: Boolean

    Whether an expression itself is non-deterministic when its "deterministic" is false, no matter whether it has any non-deterministic children.

    Whether an expression itself is non-deterministic when its "deterministic" is false, no matter whether it has any non-deterministic children. An expression is actually a tree, and deterministic being false means there is at least one tree node is non-deterministic, but we need to know the exact nodes which are non-deterministic to check if it implements the Retryable.

    Default to false because Spark checks only children by default in Expression. So it is non-deterministic iff it has non-deterministic children.

    NOTE When overriding "deterministic", this should be taken care of.

    Definition Classes
    GpuExpression
  93. final def semanticEquals(other: Expression): Boolean
    Definition Classes
    Expression
  94. def semanticHash(): Int
    Definition Classes
    Expression
  95. def setTagValue[T](tag: TreeNodeTag[T], value: T): Unit
    Definition Classes
    TreeNode
  96. def simpleString(maxFields: Int): String
    Definition Classes
    Expression → TreeNode
  97. def simpleStringWithNodeId(): String
    Definition Classes
    Expression → TreeNode
  98. def sql(isDistinct: Boolean): String
    Definition Classes
    GpuAggregateFunction
  99. def sql: String
    Definition Classes
    Expression
  100. def stringArgs: Iterator[Any]
    Attributes
    protected
    Definition Classes
    TreeNode
  101. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  102. def toAggString(isDistinct: Boolean): String

    String representation used in explain plans.

    String representation used in explain plans.

    Definition Classes
    GpuAggregateFunction
  103. def toJSON: String
    Definition Classes
    TreeNode
  104. def toString(): String
    Definition Classes
    Expression → TreeNode → AnyRef → Any
  105. def transform(rule: PartialFunction[Expression, Expression]): Expression
    Definition Classes
    TreeNode
  106. def transformDown(rule: PartialFunction[Expression, Expression]): Expression
    Definition Classes
    TreeNode
  107. def transformDownWithPruning(cond: (TreePatternBits) ⇒ Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): Expression
    Definition Classes
    TreeNode
  108. def transformUp(rule: PartialFunction[Expression, Expression]): Expression
    Definition Classes
    TreeNode
  109. def transformUpWithBeforeAndAfterRuleOnChildren(cond: (Expression) ⇒ Boolean, ruleId: RuleId)(rule: PartialFunction[(Expression, Expression), Expression]): Expression
    Definition Classes
    TreeNode
  110. def transformUpWithPruning(cond: (TreePatternBits) ⇒ Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): Expression
    Definition Classes
    TreeNode
  111. def transformWithPruning(cond: (TreePatternBits) ⇒ Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): Expression
    Definition Classes
    TreeNode
  112. lazy val treePatternBits: BitSet
    Definition Classes
    TreeNode → TreePatternBits
  113. def treeString(append: (String) ⇒ Unit, verbose: Boolean, addSuffix: Boolean, maxFields: Int, printOperatorId: Boolean): Unit
    Definition Classes
    TreeNode
  114. final def treeString(verbose: Boolean, addSuffix: Boolean, maxFields: Int, printOperatorId: Boolean): String
    Definition Classes
    TreeNode
  115. final def treeString: String
    Definition Classes
    TreeNode
  116. def unsetTagValue[T](tag: TreeNodeTag[T]): Unit
    Definition Classes
    TreeNode
  117. lazy val updateAggregates: Seq[CudfAggregate]

    update: first half of the aggregation The sequence of CudfAggregate must match the shape of inputProjections, and care must be taken to ensure that each cuDF aggregate is able to work with the corresponding inputProjection (i.e.

    update: first half of the aggregation The sequence of CudfAggregate must match the shape of inputProjections, and care must be taken to ensure that each cuDF aggregate is able to work with the corresponding inputProjection (i.e. inputProjection[i] is the input to updateAggregates[i]).

    Definition Classes
    GpuM2 → GpuAggregateFunction
  118. final def verboseString(maxFields: Int): String
    Definition Classes
    Expression → TreeNode
  119. def verboseStringWithSuffix(maxFields: Int): String
    Definition Classes
    TreeNode
  120. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  121. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  122. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  123. final def withNewChildren(newChildren: Seq[Expression]): Expression
    Definition Classes
    TreeNode
  124. def withNewChildrenInternal(newChildren: IndexedSeq[Expression]): Expression
    Definition Classes
    ShimExpression → TreeNode

Inherited from GpuM2

Inherited from Serializable

Inherited from Serializable

Inherited from ImplicitCastInputTypes

Inherited from ExpectsInputTypes

Inherited from GpuAggregateFunction

Inherited from GpuUnevaluable

Inherited from ShimExpression

Inherited from GpuExpression

Inherited from Expression

Inherited from TreeNode[Expression]

Inherited from TreePatternBits

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped