Trait diesel::sql_types::Foldable

pub trait Foldable: SingleValue {
    type Sum: SqlType + SingleValue;
    type Avg: SqlType + SingleValue;
}

Represents SQL types which can be used with SUM and AVG

Required Associated Types

type Sum: SqlType + SingleValue

The SQL type of sum(this_type)

type Avg: SqlType + SingleValue

The SQL type of avg(this_type)

Implementors

impl Foldable for BigInt

type Sum = Nullable<Numeric>

type Avg = Nullable<Numeric>

impl Foldable for Double

type Sum = Nullable<Double>

type Avg = Nullable<Double>

impl Foldable for Float

type Sum = Nullable<Float>

type Avg = Nullable<Double>

impl Foldable for Integer

type Sum = Nullable<BigInt>

type Avg = Nullable<Numeric>

impl Foldable for Interval

type Sum = Nullable<Interval>

type Avg = Nullable<Interval>

impl Foldable for Numeric

type Sum = Nullable<Numeric>

type Avg = Nullable<Numeric>

impl Foldable for SmallInt

type Sum = Nullable<BigInt>

type Avg = Nullable<Numeric>

impl<T> Foldable for Nullable<T>where T: Foldable + SqlType<IsNull = NotNull>,

type Sum = <T as Foldable>::Sum

type Avg = <T as Foldable>::Avg