AggregateExpression

open class AggregateExpression : DataValue

Encapsulates an OData aggregate expression item.

  • Default initializer.

    Declaration

    Swift

    override public init()

  • The items in the “from” clause of the aggregate item.

    Declaration

    Swift

    @inline(__always)
public final var aggregateFromList: AggregateFromList { get }

  • The alias of the aggregate transformation item.

    Declaration

    Swift

    @inline(__always)
public final var alias: String? { get }

  • Declaration

    Swift

    override open func copyMutable() -> DataValue

    Return Value

    A clone of this value if it (together with all value subcomponents) is possibly mutable, or return self value if it (together with all value subcomponents) is definitely immutable. The resulting value might share mutable metadata with this query.

  • Creates a $count aggregate expression item.

    Declaration

    Swift

    open class func count(alias: String) -> AggregateExpression

    Parameters

    alias

    The alias for the aggregate item.

    Return Value

    The aggregate transformation value.

  • Creates an aggregate expression item.

    Declaration

    Swift

    open class func create(_ value: DataValue?, method: AggregateMethod?, alias: String?) -> AggregateExpression

    Parameters

    value

    The value to be aggregated.
    method

    The aggregate method to be used for aggregating.
    alias

    The alias for the returned result property.

    Return Value

    The aggregate transformation value.

  • Creates an aggregate expression item.

    Declaration

    Swift

    open class func createWithNavigationPath(_ value: DataValue?, method: AggregateMethod?, alias: String?, navigationPath: PropertyPath?) -> AggregateExpression

    Parameters

    value

    The value to be aggregated.
    method

    The aggregate method to be used for aggregating.
    alias

    The alias for the returned result property.
    navigationPath

    The path of the related entities to apply the aggregate transformation on.

    Return Value

    The aggregate transformation value.

  • Data type of the wrapped value.

    Declaration

    Swift

    override open var dataType: DataType { get }

  • Adds a ‘from’ clause to the aggregate expression.

    Declaration

    Swift

    open func from(_ propertyPath: PropertyPath, method: AggregateMethod?) -> AggregateExpression

    Parameters

    propertyPath

    The property path for the ‘from’ clause.
    method

    The aggregate method for the ‘from’ clause.

    Return Value

    The aggregate expression value.

  • True if the aggregate transformation item represents a $count item.

    Declaration

    Swift

    @inline(__always)
public final var isCount: Bool { get }

  • The method of the aggregate transformation item.

    Declaration

    Swift

    @inline(__always)
public final var method: AggregateMethod? { get }

  • The navigation path to be applied for the aggregate expression. All the paths will be evaluated relative to this path.

    Declaration

    Swift

    @inline(__always)
public final var navigationPath: PropertyPath? { get }

  • Convert this data value to a string. If the dataType is defined by XML Schema Part 2: Datatypes, then the corresponding lexical format is used. JSON format is used for structured values (arrays and objects).

    Declaration

    Swift

    override open func toString() -> String

    Return Value

    Lexical representation of this data value.

  • The value of the aggregate transformation item.

    Declaration

    Swift

    @inline(__always)
public final var value: DataValue? { get }