Struct Aggregate 

pub struct Aggregate {
    pub table: TableName,
    pub op: AggregateOp,
    pub key: AggregateKey,
    pub value_type: Option<FlussoType>,
    pub filters: Option<Vec<Filter>>,
}

Reduces rows from a related table to a single value — a count, sum, or extreme. The key connects the tables; filters restrict which rows count.

Fields

table: TableName

op: AggregateOp

key: AggregateKey

value_type: Option<FlussoType>

The declared result type. Fixed for count (long) and avg (double) and left None; required for sum / min / max, whose result mirrors the aggregated column and so must be stated to stay database-free.

filters: Option<Vec<Filter>>

Trait Implementations

impl Clone for Aggregate

fn clone(&self) -> Aggregate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Aggregate

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Aggregate

fn deserialize<__D>( __deserializer: __D, ) -> Result<Aggregate, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Aggregate

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Serialize for Aggregate

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

where __S: Serializer,

Serialize this value into the given Serde serializer.