Struct AggregateInfo 

pub struct AggregateInfo {
    pub aggregate_type: AggregateType,
    pub column: Option<String>,
    pub alias: Option<String>,
    pub distinct: bool,
    pub filter: Option<Box<Expr>>,
    pub within_group: Vec<OrderByExpr>,
}

Information about a detected aggregate function.

Fields

aggregate_type: AggregateType

Type of aggregate

column: Option<String>

Column being aggregated (None for COUNT(*))

alias: Option<String>

Optional alias for the aggregate result

distinct: bool

Whether DISTINCT is applied

filter: Option<Box<Expr>>

FILTER clause expression (e.g. COUNT(x) FILTER (WHERE x > 5))

within_group: Vec<OrderByExpr>

WITHIN GROUP ORDER BY expressions

Implementations

impl AggregateInfo

pub fn new(aggregate_type: AggregateType, column: Option<String>) -> Self

Create a new aggregate info.

pub fn with_alias(self, alias: String) -> Self

Set the alias.

pub fn with_distinct(self, distinct: bool) -> Self

Set distinct flag.

pub fn has_filter(&self) -> bool

Check whether a FILTER clause is present.

pub fn has_within_group(&self) -> bool

Check whether a WITHIN GROUP clause is present.

Trait Implementations

impl Clone for AggregateInfo

fn clone(&self) -> AggregateInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateInfo

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

Formats the value using the given formatter.