Accumulators

object Accumulators

Builders for accumulators used in the group pipeline stage of an aggregation pipeline.

Since: 1.0
See also: Aggregation pipeline
Accumulators
Expressions

Linear Supertypes

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Accumulators
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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
def addToSet[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing all unique values that results from applying the given expression to each document in a group of documents that share the same group by key.
Gets a field name for a $group operation representing all unique values that results from applying the given expression to each document in a group of documents that share the same group by key.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$addToSet
final def asInstanceOf[T0]: T0
Definition Classes
Any
def avg[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the average of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the average of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$avg
def clone(): AnyRef
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.CloneNotSupportedException]) @native()
final def eq(arg0: AnyRef): Boolean
Definition Classes
AnyRef
def equals(arg0: AnyRef): Boolean
Definition Classes
AnyRef → Any
def finalize(): Unit
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.Throwable])
def first[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the value of the given expression when applied to the first member of the group.
Gets a field name for a $group operation representing the value of the given expression when applied to the first member of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$first
final def getClass(): Class[_ <: AnyRef]
Definition Classes
AnyRef → Any
Annotations
@native()
def hashCode(): Int
Definition Classes
AnyRef → Any
Annotations
@native()
final def isInstanceOf[T0]: Boolean
Definition Classes
Any
def last[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the value of the given expression when applied to the last member of the group.
Gets a field name for a $group operation representing the value of the given expression when applied to the last member of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$last
def max[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the maximum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the maximum of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$max
def min[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the minimum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the minimum of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$min
final def ne(arg0: AnyRef): Boolean
Definition Classes
AnyRef
final def notify(): Unit
Definition Classes
AnyRef
Annotations
@native()
final def notifyAll(): Unit
Definition Classes
AnyRef
Annotations
@native()
def push[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing an array of all values that results from applying an expression to each document in a group of documents that share the same group by key.
Gets a field name for a $group operation representing an array of all values that results from applying an expression to each document in a group of documents that share the same group by key.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$push
def stdDevPop[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Use if the values encompass the entire population of data you want to represent and do not wish to generalize about a larger population.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
Since
1.1
Note
Requires MongoDB 3.2 or greater
See also
$stdDevPop
def stdDevSamp[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Use if the values encompass a sample of a population of data from which to generalize about the population.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
Since
1.1
Note
Requires MongoDB 3.2 or greater
See also
$stdDevSamp
def sum[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the sum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sum of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$sum
final def synchronized[T0](arg0: => T0): T0
Definition Classes
AnyRef
def toString(): String
Definition Classes
AnyRef → Any
final def wait(): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long, arg1: Int): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException]) @native()

Ungrouped

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
def addToSet[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing all unique values that results from applying the given expression to each document in a group of documents that share the same group by key.
Gets a field name for a $group operation representing all unique values that results from applying the given expression to each document in a group of documents that share the same group by key.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$addToSet
final def asInstanceOf[T0]: T0
Definition Classes
Any
def avg[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the average of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the average of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$avg
def clone(): AnyRef
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.CloneNotSupportedException]) @native()
final def eq(arg0: AnyRef): Boolean
Definition Classes
AnyRef
def equals(arg0: AnyRef): Boolean
Definition Classes
AnyRef → Any
def finalize(): Unit
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.Throwable])
def first[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the value of the given expression when applied to the first member of the group.
Gets a field name for a $group operation representing the value of the given expression when applied to the first member of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$first
final def getClass(): Class[_ <: AnyRef]
Definition Classes
AnyRef → Any
Annotations
@native()
def hashCode(): Int
Definition Classes
AnyRef → Any
Annotations
@native()
final def isInstanceOf[T0]: Boolean
Definition Classes
Any
def last[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the value of the given expression when applied to the last member of the group.
Gets a field name for a $group operation representing the value of the given expression when applied to the last member of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$last
def max[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the maximum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the maximum of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$max
def min[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the minimum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the minimum of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$min
final def ne(arg0: AnyRef): Boolean
Definition Classes
AnyRef
final def notify(): Unit
Definition Classes
AnyRef
Annotations
@native()
final def notifyAll(): Unit
Definition Classes
AnyRef
Annotations
@native()
def push[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing an array of all values that results from applying an expression to each document in a group of documents that share the same group by key.
Gets a field name for a $group operation representing an array of all values that results from applying an expression to each document in a group of documents that share the same group by key.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$push
def stdDevPop[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Use if the values encompass the entire population of data you want to represent and do not wish to generalize about a larger population.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
Since
1.1
Note
Requires MongoDB 3.2 or greater
See also
$stdDevPop
def stdDevSamp[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Use if the values encompass a sample of a population of data from which to generalize about the population.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
Since
1.1
Note
Requires MongoDB 3.2 or greater
See also
$stdDevSamp
def sum[TExpression](fieldName: String, expression: TExpression): BsonField
Gets a field name for a $group operation representing the sum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sum of the values of the given expression when applied to all members of the group.
TExpression
the expression type
fieldName
the field name
expression
the expression
returns
the field
See also
$sum
final def synchronized[T0](arg0: => T0): T0
Definition Classes
AnyRef
def toString(): String
Definition Classes
AnyRef → Any
final def wait(): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long, arg1: Int): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException]) @native()

Packages

Driver structure

Accumulators

object Accumulators

Value Members

Inherited from AnyRef

Value Members

Inherited from Any

Value Members

Ungrouped

Packages

Driver structure

Accumulators

object Accumulators

Value Members

Inherited from AnyRef

Value Members

Inherited from Any

Value Members

Ungrouped

Accumulators