Struct AggregateGroup 

pub struct AggregateGroup {
    pub key: Option<String>,
    pub label: Option<String>,
    pub count: u64,
    pub values: HashMap<String, Option<String>>,
}

One group’s numbers. key is the group’s value; None is a real answer — the rows whose group column is null — and is distinct from “no rows”.

Fields

key: Option<String>

label: Option<String>

The group’s display label (the related row’s label column), when the caller asked for one and the group column is a relation FK.

count: u64

values: HashMap<String, Option<String>>

Reduction results keyed "sum:amount", carried as strings.

Postgres numeric holds more precision than an IEEE double, and money columns are exactly where that bites: a tenant large enough for the total to matter is a tenant large enough to round it. The string is the exact value Postgres computed; the caller decides how to parse it. None is SQL NULL — no rows contributed — which is not zero.

Trait Implementations

impl Clone for AggregateGroup

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AggregateGroup

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AggregateGroup

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AggregateGroup

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.