org.apache.spark.sql.catalyst.expressions.aggregate

HyperLogLogPlusPlus

Companion object HyperLogLogPlusPlus

case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05, mutableAggBufferOffset: Int = 0, inputAggBufferOffset: Int = 0) extends ImperativeAggregate with Product with Serializable

HyperLogLog++ (HLL++) is a state of the art cardinality estimation algorithm. This class implements the dense version of the HLL++ algorithm as an Aggregate Function.

This implementation has been based on the following papers: HyperLogLog: the analysis of a near-optimal cardinality estimation algorithm http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf

HyperLogLog in Practice: Algorithmic Engineering of a State of The Art Cardinality Estimation Algorithm http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/en/us/pubs/archive/40671.pdf

Appendix to HyperLogLog in Practice: Algorithmic Engineering of a State of the Art Cardinality Estimation Algorithm https://docs.google.com/document/d/1gyjfMHy43U9OWBXxfaeG-3MjGzejW1dlpyMwEYAAWEI/view?fullscreen#

child: to estimate the cardinality of.
relativeSD: the maximum estimation error allowed.

Annotations: @ExpressionDescription()

Linear Supertypes

Serializable, Serializable, ImperativeAggregate, CodegenFallback, AggregateFunction, Expression, TreeNode[Expression], Product, Equals, AnyRef, Any

Ordering

Alphabetic
By Inheritance

Inherited

HyperLogLogPlusPlus
Serializable
Serializable
ImperativeAggregate
CodegenFallback
AggregateFunction
Expression
TreeNode
Product
Equals
AnyRef
Any

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Visibility

Public
All

Instance Constructors

new HyperLogLogPlusPlus(child: Expression, relativeSD: Expression)
new HyperLogLogPlusPlus(child: Expression)
new HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05, mutableAggBufferOffset: Int = 0, inputAggBufferOffset: Int = 0)
child
to estimate the cardinality of.
relativeSD
the maximum estimation error allowed.

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
val aggBufferAttributes: Seq[AttributeReference]
Allocate enough words to store all registers.
Allocate enough words to store all registers.

Definition Classes
HyperLogLogPlusPlus → AggregateFunction
def aggBufferSchema: StructType
The schema of the aggregation buffer.
The schema of the aggregation buffer.

Definition Classes
HyperLogLogPlusPlus → AggregateFunction
def apply(number: Int): TreeNode[_]
Returns the tree node at the specified number, used primarily for interactive debugging.
Returns the tree node at the specified number, used primarily for interactive debugging. Numbers for each node can be found in the numberedTreeString.
Note that this cannot return BaseType because logical plan's plan node might return physical plan for innerChildren, e.g. in-memory relation logical plan node has a reference to the physical plan node it is referencing.

Definition Classes
TreeNode
def argString(maxFields: Int): String
Returns a string representing the arguments to this node, minus any children
Returns a string representing the arguments to this node, minus any children

Definition Classes
TreeNode
def asCode: String
Returns a 'scala code' representation of this TreeNode and its children.
Returns a 'scala code' representation of this TreeNode and its children. Intended for use when debugging where the prettier toString function is obfuscating the actual structure. In the case of 'pure' TreeNodes that only contain primitives and other TreeNodes, the result can be pasted in the REPL to build an equivalent Tree.

Definition Classes
TreeNode
final def asInstanceOf[T0]: T0

Definition Classes
Any
lazy val canonicalized: Expression
Returns an expression where a best effort attempt has been made to transform this in a way that preserves the result but removes cosmetic variations (case sensitivity, ordering for commutative operations, etc.) See Canonicalize for more details.
Returns an expression where a best effort attempt has been made to transform this in a way that preserves the result but removes cosmetic variations (case sensitivity, ordering for commutative operations, etc.) See Canonicalize for more details.
deterministic expressions where this.canonicalized == other.canonicalized will always evaluate to the same result.

Definition Classes
Expression
def checkInputDataTypes(): TypeCheckResult
Checks the input data types, returns TypeCheckResult.success if it's valid, or returns a TypeCheckResult with an error message if invalid.
Checks the input data types, returns TypeCheckResult.success if it's valid, or returns a TypeCheckResult with an error message if invalid. Note: it's not valid to call this method until childrenResolved == true.

Definition Classes
Expression
val child: Expression
def children: Seq[Expression]
Returns a Seq of the children of this node.
Returns a Seq of the children of this node. Children should not change. Immutability required for containsChild optimization

Definition Classes
HyperLogLogPlusPlus → TreeNode
def childrenResolved: Boolean
Returns true if all the children of this expression have been resolved to a specific schema and false if any still contains any unresolved placeholders.
Returns true if all the children of this expression have been resolved to a specific schema and false if any still contains any unresolved placeholders.

Definition Classes
Expression
def clone(): Expression

Definition Classes
TreeNode → AnyRef
def collect[B](pf: PartialFunction[Expression, B]): Seq[B]
Returns a Seq containing the result of applying a partial function to all elements in this tree on which the function is defined.
Returns a Seq containing the result of applying a partial function to all elements in this tree on which the function is defined.

Definition Classes
TreeNode
def collectFirst[B](pf: PartialFunction[Expression, B]): Option[B]
Finds and returns the first TreeNode of the tree for which the given partial function is defined (pre-order), and applies the partial function to it.
Finds and returns the first TreeNode of the tree for which the given partial function is defined (pre-order), and applies the partial function to it.

Definition Classes
TreeNode
def collectLeaves(): Seq[Expression]
Returns a Seq containing the leaves in this tree.
Returns a Seq containing the leaves in this tree.

Definition Classes
TreeNode
lazy val containsChild: Set[TreeNode[_]]

Definition Classes
TreeNode
def copyTagsFrom(other: Expression): Unit

Attributes
protected
Definition Classes
TreeNode
def dataType: DataType
Returns the DataType of the result of evaluating this expression.
Returns the DataType of the result of evaluating this expression. It is invalid to query the dataType of an unresolved expression (i.e., when resolved == false).

Definition Classes
HyperLogLogPlusPlus → Expression
def defaultResult: Option[Literal]
Result of the aggregate function when the input is empty.
Result of the aggregate function when the input is empty. This is currently only used for the proper rewriting of distinct aggregate functions.

Definition Classes
AggregateFunction
lazy val deterministic: Boolean
Returns true when the current expression always return the same result for fixed inputs from children.
Returns true when the current expression always return the same result for fixed inputs from children. The non-deterministic expressions should not change in number and order. They should not be evaluated during the query planning.
Note that this means that an expression should be considered as non-deterministic if: - it relies on some mutable internal state, or - it relies on some implicit input that is not part of the children expression list. - it has non-deterministic child or children. - it assumes the input satisfies some certain condition via the child operator.
An example would be SparkPartitionID that relies on the partition id returned by TaskContext. By default leaf expressions are deterministic as Nil.forall(_.deterministic) returns true.

Definition Classes
Expression
def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode
Returns Java source code that can be compiled to evaluate this expression.
Returns Java source code that can be compiled to evaluate this expression. The default behavior is to call the eval method of the expression. Concrete expression implementations should override this to do actual code generation.
ctx
a CodegenContext
ev
an ExprCode with unique terms.
returns
an ExprCode containing the Java source code to generate the given expression

Attributes
protected
Definition Classes
CodegenFallback → Expression
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def eval(buffer: InternalRow): Any
Compute the HyperLogLog estimate.
Compute the HyperLogLog estimate.

Definition Classes
HyperLogLogPlusPlus → Expression
def fastEquals(other: TreeNode[_]): Boolean
Faster version of equality which short-circuits when two treeNodes are the same instance.
Faster version of equality which short-circuits when two treeNodes are the same instance. We don't just override Object.equals, as doing so prevents the scala compiler from generating case class equals methods

Definition Classes
TreeNode
def finalize(): Unit

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def find(f: (Expression) ⇒ Boolean): Option[Expression]
Find the first TreeNode that satisfies the condition specified by f.
Find the first TreeNode that satisfies the condition specified by f. The condition is recursively applied to this node and all of its children (pre-order).

Definition Classes
TreeNode
def flatArguments: Iterator[Any]

Attributes
protected
Definition Classes
Expression
def flatMap[A](f: (Expression) ⇒ TraversableOnce[A]): Seq[A]
Returns a Seq by applying a function to all nodes in this tree and using the elements of the resulting collections.
Returns a Seq by applying a function to all nodes in this tree and using the elements of the resulting collections.

Definition Classes
TreeNode
final def foldable: Boolean
An aggregate function is not foldable.
An aggregate function is not foldable.

Definition Classes
AggregateFunction → Expression
def foreach(f: (Expression) ⇒ Unit): Unit
Runs the given function on this node and then recursively on children.
Runs the given function on this node and then recursively on children.
f
the function to be applied to each node in the tree.

Definition Classes
TreeNode
def foreachUp(f: (Expression) ⇒ Unit): Unit
Runs the given function recursively on children then on this node.
Runs the given function recursively on children then on this node.
f
the function to be applied to each node in the tree.

Definition Classes
TreeNode
def genCode(ctx: CodegenContext): ExprCode
Returns an ExprCode, that contains the Java source code to generate the result of evaluating the expression on an input row.
Returns an ExprCode, that contains the Java source code to generate the result of evaluating the expression on an input row.
ctx
a CodegenContext
returns
ExprCode

Definition Classes
Expression
def generateTreeString(depth: Int, lastChildren: Seq[Boolean], append: (String) ⇒ Unit, verbose: Boolean, prefix: String = "", addSuffix: Boolean = false, maxFields: Int, printNodeId: Boolean): Unit
Appends the string representation of this node and its children to the given Writer.
Appends the string representation of this node and its children to the given Writer.
The i-th element in lastChildren indicates whether the ancestor of the current node at depth i + 1 is the last child of its own parent node. The depth of the root node is 0, and lastChildren for the root node should be empty.
Note that this traversal (numbering) order must be the same as getNodeNumbered.

Definition Classes
TreeNode
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
Annotations
@native()
def getTagValue[T](tag: TreeNodeTag[T]): Option[T]

Definition Classes
TreeNode
def hashCode(): Int

Definition Classes
TreeNode → AnyRef → Any
val hllppHelper: HyperLogLogPlusPlusHelper
def initialize(buffer: InternalRow): Unit
Fill all words with zeros.
Fill all words with zeros.

Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate
def innerChildren: Seq[TreeNode[_]]
All the nodes that should be shown as a inner nested tree of this node.
All the nodes that should be shown as a inner nested tree of this node. For example, this can be used to show sub-queries.

Definition Classes
TreeNode
val inputAggBufferAttributes: Seq[AttributeReference]
Attributes of fields in input aggregation buffers (immutable aggregation buffers that are merged with mutable aggregation buffers in the merge() function or merge expressions).
Attributes of fields in input aggregation buffers (immutable aggregation buffers that are merged with mutable aggregation buffers in the merge() function or merge expressions). These attributes are created automatically by cloning the aggBufferAttributes.

Definition Classes
HyperLogLogPlusPlus → AggregateFunction
val inputAggBufferOffset: Int
The offset of this function's start buffer value in the underlying shared input aggregation buffer.
The offset of this function's start buffer value in the underlying shared input aggregation buffer. An input aggregation buffer is used when we merge two aggregation buffers together in the update() function and is immutable (we merge an input aggregation buffer and a mutable aggregation buffer and then store the new buffer values to the mutable aggregation buffer).
An input aggregation buffer may contain extra fields, such as grouping keys, at its start, so mutableAggBufferOffset and inputAggBufferOffset are often different.
For example, say we have a grouping expression, key, and two aggregate functions, avg(x) and avg(y). In the shared input aggregation buffer, the position of the first buffer value of avg(x) will be 1 and the position of the first buffer value of avg(y) will be 3 (position 0 is used for the value of key):
```
avg(x) inputAggBufferOffset = 1
         |
         v
+--------+--------+--------+--------+--------+
|  key   |  sum1  | count1 |  sum2  | count2 |
+--------+--------+--------+--------+--------+
                           ^
                           |
             avg(y) inputAggBufferOffset = 3
```
Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def jsonFields: List[JField]

Attributes
protected
Definition Classes
TreeNode
def makeCopy(newArgs: Array[AnyRef]): Expression
Creates a copy of this type of tree node after a transformation.
Creates a copy of this type of tree node after a transformation. Must be overridden by child classes that have constructor arguments that are not present in the productIterator.
newArgs
the new product arguments.

Definition Classes
TreeNode
def map[A](f: (Expression) ⇒ A): Seq[A]
Returns a Seq containing the result of applying the given function to each node in this tree in a preorder traversal.
Returns a Seq containing the result of applying the given function to each node in this tree in a preorder traversal.
f
the function to be applied.

Definition Classes
TreeNode
def mapChildren(f: (Expression) ⇒ Expression): Expression
Returns a copy of this node where f has been applied to all the nodes in children.
Returns a copy of this node where f has been applied to all the nodes in children.

Definition Classes
TreeNode
def mapProductIterator[B](f: (Any) ⇒ B)(implicit arg0: ClassTag[B]): Array[B]
Efficient alternative to productIterator.map(f).toArray.
Efficient alternative to productIterator.map(f).toArray.

Attributes
protected
Definition Classes
TreeNode
def merge(buffer1: InternalRow, buffer2: InternalRow): Unit
Merge the HLL++ buffers.
Merge the HLL++ buffers.

Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate
val mutableAggBufferOffset: Int
The offset of this function's first buffer value in the underlying shared mutable aggregation buffer.
The offset of this function's first buffer value in the underlying shared mutable aggregation buffer.
For example, we have two aggregate functions avg(x) and avg(y), which share the same aggregation buffer. In this shared buffer, the position of the first buffer value of avg(x) will be 0 and the position of the first buffer value of avg(y) will be 2:
```
avg(x) mutableAggBufferOffset = 0
        |
        v
        +--------+--------+--------+--------+
        |  sum1  | count1 |  sum2  | count2 |
        +--------+--------+--------+--------+
                          ^
                          |
           avg(y) mutableAggBufferOffset = 2
```
Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def nodeName: String
Returns the name of this type of TreeNode.
Returns the name of this type of TreeNode. Defaults to the class name. Note that we remove the "Exec" suffix for physical operators here.

Definition Classes
TreeNode
final def notify(): Unit

Definition Classes
AnyRef
Annotations
@native()
final def notifyAll(): Unit

Definition Classes
AnyRef
Annotations
@native()
def nullable: Boolean

Definition Classes
HyperLogLogPlusPlus → Expression
def numberedTreeString: String
Returns a string representation of the nodes in this tree, where each operator is numbered.
Returns a string representation of the nodes in this tree, where each operator is numbered. The numbers can be used with TreeNode.apply to easily access specific subtrees.
The numbers are based on depth-first traversal of the tree (with innerChildren traversed first before children).

Definition Classes
TreeNode
val origin: Origin

Definition Classes
TreeNode
def otherCopyArgs: Seq[AnyRef]
Args to the constructor that should be copied, but not transformed.
Args to the constructor that should be copied, but not transformed. These are appended to the transformed args automatically by makeCopy

Attributes
protected
Definition Classes
TreeNode
def p(number: Int): Expression
Returns the tree node at the specified number, used primarily for interactive debugging.
Returns the tree node at the specified number, used primarily for interactive debugging. Numbers for each node can be found in the numberedTreeString.
This is a variant of apply that returns the node as BaseType (if the type matches).

Definition Classes
TreeNode
def prettyJson: String

Definition Classes
TreeNode
def prettyName: String
Returns a user-facing string representation of this expression's name.
Returns a user-facing string representation of this expression's name. This should usually match the name of the function in SQL.

Definition Classes
HyperLogLogPlusPlus → Expression
def references: AttributeSet

Definition Classes
Expression
val relativeSD: Double
lazy val resolved: Boolean
Returns true if this expression and all its children have been resolved to a specific schema and input data types checking passed, and false if it still contains any unresolved placeholders or has data types mismatch.
Returns true if this expression and all its children have been resolved to a specific schema and input data types checking passed, and false if it still contains any unresolved placeholders or has data types mismatch. Implementations of expressions should override this if the resolution of this type of expression involves more than just the resolution of its children and type checking.

Definition Classes
Expression
def semanticEquals(other: Expression): Boolean
Returns true when two expressions will always compute the same result, even if they differ cosmetically (i.e.
Returns true when two expressions will always compute the same result, even if they differ cosmetically (i.e. capitalization of names in attributes may be different).
See Canonicalize for more details.

Definition Classes
Expression
def semanticHash(): Int
Returns a hashCode for the calculation performed by this expression.
Returns a hashCode for the calculation performed by this expression. Unlike the standard hashCode, an attempt has been made to eliminate cosmetic differences.
See Canonicalize for more details.

Definition Classes
Expression
def setTagValue[T](tag: TreeNodeTag[T], value: T): Unit

Definition Classes
TreeNode
def simpleString(maxFields: Int): String
ONE line description of this node.
ONE line description of this node.
maxFields
Maximum number of fields that will be converted to strings. Any elements beyond the limit will be dropped.

Definition Classes
Expression → TreeNode
def simpleStringWithNodeId(): String
ONE line description of this node containing the node identifier.
ONE line description of this node containing the node identifier.

Definition Classes
Expression → TreeNode
def sql(isDistinct: Boolean): String

Definition Classes
AggregateFunction
def sql: String
Returns SQL representation of this expression.
Returns SQL representation of this expression. For expressions extending NonSQLExpression, this method may return an arbitrary user facing string.

Definition Classes
Expression
def stringArgs: Iterator[Any]
The arguments that should be included in the arg string.
The arguments that should be included in the arg string. Defaults to the productIterator.

Attributes
protected
Definition Classes
TreeNode
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toAggString(isDistinct: Boolean): String
String representation used in explain plans.
String representation used in explain plans.

Definition Classes
AggregateFunction
def toAggregateExpression(isDistinct: Boolean): AggregateExpression
Wraps this AggregateFunction in an AggregateExpression and sets isDistinct flag of the AggregateExpression to the given value because AggregateExpression is the container of an AggregateFunction, aggregation mode, and the flag indicating if this aggregation is distinct aggregation or not.
Wraps this AggregateFunction in an AggregateExpression and sets isDistinct flag of the AggregateExpression to the given value because AggregateExpression is the container of an AggregateFunction, aggregation mode, and the flag indicating if this aggregation is distinct aggregation or not. An AggregateFunction should not be used without being wrapped in an AggregateExpression.

Definition Classes
AggregateFunction
def toAggregateExpression(): AggregateExpression
Creates AggregateExpression with isDistinct flag disabled.
Creates AggregateExpression with isDistinct flag disabled.

Definition Classes
AggregateFunction
See also
toAggregateExpression(isDistinct: Boolean) for detailed description
def toJSON: String

Definition Classes
TreeNode
def toString(): String

Definition Classes
Expression → TreeNode → AnyRef → Any
def transform(rule: PartialFunction[Expression, Expression]): Expression
Returns a copy of this node where rule has been recursively applied to the tree.
Returns a copy of this node where rule has been recursively applied to the tree. When rule does not apply to a given node it is left unchanged. Users should not expect a specific directionality. If a specific directionality is needed, transformDown or transformUp should be used.
rule
the function use to transform this nodes children

Definition Classes
TreeNode
def transformDown(rule: PartialFunction[Expression, Expression]): Expression
Returns a copy of this node where rule has been recursively applied to it and all of its children (pre-order).
Returns a copy of this node where rule has been recursively applied to it and all of its children (pre-order). When rule does not apply to a given node it is left unchanged.
rule
the function used to transform this nodes children

Definition Classes
TreeNode
def transformUp(rule: PartialFunction[Expression, Expression]): Expression
Returns a copy of this node where rule has been recursively applied first to all of its children and then itself (post-order).
Returns a copy of this node where rule has been recursively applied first to all of its children and then itself (post-order). When rule does not apply to a given node, it is left unchanged.
rule
the function use to transform this nodes children

Definition Classes
TreeNode
def treeString(append: (String) ⇒ Unit, verbose: Boolean, addSuffix: Boolean, maxFields: Int, printOperatorId: Boolean): Unit

Definition Classes
TreeNode
final def treeString(verbose: Boolean, addSuffix: Boolean = false, maxFields: Int = SQLConf.get.maxToStringFields, printOperatorId: Boolean = false): String

Definition Classes
TreeNode
final def treeString: String
Returns a string representation of the nodes in this tree
Returns a string representation of the nodes in this tree

Definition Classes
TreeNode
def unsetTagValue[T](tag: TreeNodeTag[T]): Unit

Definition Classes
TreeNode
def update(buffer: InternalRow, input: InternalRow): Unit
Update the HLL++ buffer.
Update the HLL++ buffer.

Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate
final def verboseString(maxFields: Int): String
ONE line description of this node with more information
ONE line description of this node with more information

Definition Classes
Expression → TreeNode
def verboseStringWithSuffix(maxFields: Int): String
ONE line description of this node with some suffix information
ONE line description of this node with some suffix information

Definition Classes
TreeNode
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
def withNewChildren(newChildren: Seq[Expression]): Expression
Returns a copy of this node with the children replaced.
Returns a copy of this node with the children replaced. TODO: Validate somewhere (in debug mode?) that children are ordered correctly.

Definition Classes
TreeNode
def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate
Returns a copy of this ImperativeAggregate with an updated mutableAggBufferOffset.
Returns a copy of this ImperativeAggregate with an updated mutableAggBufferOffset. This new copy's attributes may have different ids than the original.

Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate
def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate
Returns a copy of this ImperativeAggregate with an updated mutableAggBufferOffset.
Returns a copy of this ImperativeAggregate with an updated mutableAggBufferOffset. This new copy's attributes may have different ids than the original.

Definition Classes
HyperLogLogPlusPlus → ImperativeAggregate

Packages

Standard Expressions

Named Expressions

Evaluation

HyperLogLogPlusPlus

Companion object HyperLogLogPlusPlus

case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05, mutableAggBufferOffset: Int = 0, inputAggBufferOffset: Int = 0) extends ImperativeAggregate with Product with Serializable

Instance Constructors

Value Members

Inherited from Serializable

Inherited from Serializable

Inherited from ImperativeAggregate

Inherited from CodegenFallback

Inherited from AggregateFunction

Inherited from Expression

Inherited from TreeNode[Expression]

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

Standard Expressions

Named Expressions

Evaluation

HyperLogLogPlusPlus 

Companion object HyperLogLogPlusPlus

case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05, mutableAggBufferOffset: Int = 0, inputAggBufferOffset: Int = 0) extends ImperativeAggregate with Product with Serializable

Instance Constructors

Value Members

Inherited from Serializable

Inherited from Serializable

Inherited from ImperativeAggregate

Inherited from CodegenFallback

Inherited from AggregateFunction

Inherited from Expression

Inherited from TreeNode[Expression]

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped

HyperLogLogPlusPlus