Enum query_connector::AggregationSelection

pub enum AggregationSelection {
    Field(ScalarFieldRef),
    Count {
        all: bool,
        fields: Vec<ScalarFieldRef>,
    },
    Average(Vec<ScalarFieldRef>),
    Sum(Vec<ScalarFieldRef>),
    Min(Vec<ScalarFieldRef>),
    Max(Vec<ScalarFieldRef>),
}

Selections for aggregation queries.

Variants

Field(ScalarFieldRef)

Single field selector. Only valid in the context of group by statements.

Count

Fields

all: bool

fields: Vec<ScalarFieldRef>

Counts records of the model that match the query. all indicates that an all-records selection has been made (e.g. SQL *). fields are specific fields to count on. By convention, if all is true, it will always be the last of the count results.

Average(Vec<ScalarFieldRef>)

Compute average for each field contained.

Sum(Vec<ScalarFieldRef>)

Compute sum for each field contained.

Min(Vec<ScalarFieldRef>)

Compute mininum for each field contained.

Max(Vec<ScalarFieldRef>)

Compute maximum for each field contained.

Implementations

impl AggregationSelection

pub fn identifiers(&self) -> Vec<(String, TypeIdentifier, FieldArity)>

Returns (field_db_name, TypeIdentifier, FieldArity)

Trait Implementations

impl Clone for AggregationSelection

fn clone(&self) -> AggregationSelection

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AggregationSelection

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

Formats the value using the given formatter.