Struct AggregateExpr 

pub struct AggregateExpr {
    pub function: AggregateFunction,
    pub arg: Option<TypedExpr>,
    pub extra_args: Vec<TypedExpr>,
    pub distinct: bool,
    pub result_type: ResolvedType,
    pub filter: Option<TypedExpr>,
    pub order_by: Vec<SortExpr>,
}

Aggregate expression definition.

Fields

function: AggregateFunction

arg: Option<TypedExpr>

extra_args: Vec<TypedExpr>

Additional inputs for two-argument aggregates. Existing accumulators remain single-input through arg; only covariance, regression, and arg-min/max consume this vector.

distinct: bool

result_type: ResolvedType

filter: Option<TypedExpr>

FILTER (WHERE predicate): rows where the predicate is not TRUE are skipped before the accumulator (and any DISTINCT set) sees them.

order_by: Vec<SortExpr>

Aggregate-local ordering. Non-empty only for order-sensitive aggregates (GROUP_CONCAT / STRING_AGG / ordered-set aggregates); the planner discards validated ORDER BY on order-insensitive aggregates (D3 in docs/sql-aggregate-filter-within-group.md).

Implementations

impl AggregateExpr

pub fn count_star() -> Self

pub fn count(arg: TypedExpr, distinct: bool) -> Self

pub fn sum(arg: TypedExpr) -> Self

pub fn total(arg: TypedExpr) -> Self

pub fn avg(arg: TypedExpr) -> Self

pub fn min(arg: TypedExpr) -> Self

pub fn max(arg: TypedExpr) -> Self

Trait Implementations

impl Clone for AggregateExpr

fn clone(&self) -> AggregateExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateExpr

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

Formats the value using the given formatter.