Struct AggregateFunction 

pub struct AggregateFunction {
    pub name: String,
    pub args: Vec<Expression>,
    pub distinct: bool,
    pub filter: Option<Expression>,
    pub order_by: Vec<Ordered>,
    pub limit: Option<Box<Expression>>,
    pub ignore_nulls: Option<bool>,
}

Represent a named aggregate function call with optional FILTER, ORDER BY, and LIMIT.

This struct is used for aggregate function calls that are not covered by one of the dedicated typed variants (e.g. Count, Sum). It supports SQL:2003 FILTER (WHERE …) clauses, ordered-set aggregates, and IGNORE NULLS / RESPECT NULLS modifiers.

Fields

name: String

The aggregate function name (e.g. “JSON_AGG”, “XMLAGG”).

args: Vec<Expression>

Positional arguments.

distinct: bool

Whether DISTINCT was specified.

filter: Option<Expression>

Optional FILTER (WHERE …) clause applied to the aggregate.

order_by: Vec<Ordered>

ORDER BY inside aggregate (e.g., JSON_AGG(x ORDER BY y))

limit: Option<Box<Expression>>

LIMIT inside aggregate (e.g., ARRAY_CONCAT_AGG(x LIMIT 2))

ignore_nulls: Option<bool>

IGNORE NULLS / RESPECT NULLS

Trait Implementations

impl Clone for AggregateFunction

fn clone(&self) -> AggregateFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateFunction

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

Formats the value using the given formatter.

impl Default for AggregateFunction

fn default() -> AggregateFunction

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AggregateFunction

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for AggregateFunction

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for AggregateFunction

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 AggregateFunction