Struct AggExpr 

pub struct AggExpr {
    pub func: AggFunc,
    pub arg: Option<ExprId>,
    pub percentile: Option<ExprId>,
    pub alias: String,
    pub out_var: Option<VarId>,
}

An aggregation expression inside an AGGREGATE operator.

Fields

func: AggFunc

The aggregation function.

arg: Option<ExprId>

The argument expression (None for COUNT(*)).

percentile: Option<ExprId>

The percentile argument for percentileDisc(expr, percentile) / percentileCont(expr, percentile).

alias: String

Output column name.

out_var: Option<VarId>

When this aggregate is computed as a sub-expression of a larger RETURN item (count(*) + 1), the synthetic variable bound to its output column so a following Project can reference it. None for a terminal top-level aggregate (no Project follows). (#599 nested aggregates.)

Trait Implementations

impl Clone for AggExpr

fn clone(&self) -> AggExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggExpr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AggExpr

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for AggExpr

fn eq(&self, other: &AggExpr) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for AggExpr

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AggExpr