Struct AggregateExpr 

pub struct AggregateExpr {
    pub function: AggFunction,
    pub column_pattern: String,
    pub label_key: String,
    pub label_pattern: String,
    pub group_by: Vec<String>,
}

An aggregate expression: either mean(recall) over profile~label (single-key filter form, emits one aggregate row) or mean(recall) over k,limit,optimize_for (multi-key grouping form, emits one aggregate row per distinct value-tuple).

Fields

function: AggFunction

Aggregation function.

column_pattern: String

Column name pattern — only gauge columns containing this string are aggregated; others show - in the aggregate row.

label_key: String

Label key to filter rows on (e.g., "profile"). Set in the single-key filter form. Empty when group_by is non-empty (multi-key grouping form).

label_pattern: String

Substring pattern matched against the label value (e.g., "label"). Set in the single-key filter form. Empty when group_by is non-empty.

group_by: Vec<String>

Multi-key grouping form: when non-empty, rows are grouped by every distinct tuple of values across these label keys, and the aggregate emits one row per group. label_key / label_pattern are empty when this is set.

Trait Implementations

impl Clone for AggregateExpr

fn clone(&self) -> Self

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.