Struct Aggregation 

pub struct Aggregation {
    pub col: Option<String>,
    pub op: String,
    pub alias: Option<String>,
}

A single aggregation in a group_by query.

op is one of count | sum | avg | min | max (case-insensitive). col is required for every op except count, where it may be omitted to mean COUNT(*). alias is the JSON output key; if omitted, it defaults to count for COUNT(*) and {op}_{col} otherwise.

Fields

col: Option<String>

op: String

alias: Option<String>

Trait Implementations

impl Clone for Aggregation

fn clone(&self) -> Aggregation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'de> Deserialize<'de> for Aggregation

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.