Struct AggregateResult 

pub struct AggregateResult {
    pub count: Option<i64>,
    pub sum: HashMap<String, f64>,
    pub avg: HashMap<String, f64>,
    pub min: HashMap<String, Value>,
    pub max: HashMap<String, Value>,
}

Result of an aggregation query.

Populated from the single-row result of an aggregate query by AggregateOperation::exec. The keys in each map are the column names stripped of the _sum_ / _avg_ / _min_ / _max_ prefixes emitted by AggregateField::alias, so callers index by the original column (e.g. result.sum.get("views")).

Fields

count: Option<i64>

Total count (if requested).

sum: HashMap<String, f64>

Sum results keyed by column name.

avg: HashMap<String, f64>

Average results keyed by column name.

min: HashMap<String, Value>

Minimum results keyed by column name.

max: HashMap<String, Value>

Maximum results keyed by column name.

Implementations

impl AggregateResult

pub fn from_row(row: HashMap<String, FilterValue>) -> Self

Build an AggregateResult from the single column-value map returned by crate::traits::QueryEngine::aggregate_query for a whole-table aggregate.

The input map’s keys are the dialect-emitted aliases (_count, _sum_<col>, _avg_<col>, …). This method strips the prefix and routes each entry into the right typed accessor bucket. Values that don’t parse as the expected numeric type are dropped silently — aggregates against empty result sets legitimately return NULL.

pub fn sum_as_f64(&self, column: &str) -> Option<f64>

Pull the sum of a column as f64 if present.

pub fn avg_as_f64(&self, column: &str) -> Option<f64>

Pull the average of a column as f64 if present.

pub fn min_as_f64(&self, column: &str) -> Option<f64>

Pull the minimum of a column as f64 if the stored JSON value is numeric.

pub fn max_as_f64(&self, column: &str) -> Option<f64>

Pull the maximum of a column as f64 if the stored JSON value is numeric.

Trait Implementations

impl Clone for AggregateResult

fn clone(&self) -> AggregateResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateResult

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

Formats the value using the given formatter.

impl Default for AggregateResult

fn default() -> AggregateResult

Returns the “default value” for a type.