Struct ReduceAcc 

pub struct ReduceAcc {
    pub int_sum: i128,
    pub float_sum: f64,
    pub non_null: i64,
    pub float_count: i64,
}

One per-column running accumulator for a Sum/Avg aggregate inside a StorageValue::Reduce (REDUCE-DESIGN.md §5). The integer and float sums are kept apart so the emitted sum matches SQLite’s typing — integer iff every summed value was an integer, real once any float contributes — and stays fully invertible (a later Remove of a float value demotes the result back to an integer).

• int_sum / float_sum — running Σ of the column’s integer- and float-typed non-NULL values. int_sum is i128 (design 226 §5.3): the accumulator folds deltas in arrival order (Removes included), so a transient past i64::MAX that SQLite’s scan order would never see must not error or wrap — and -1 × i64::MIN must not overflow on a Remove. Only the emitted total is bounded: sum raises a typed error at emit when the set total leaves the i64 range (op/reduce.rs’s sum_value).
• non_null — count of non-NULL values; this is avg’s denominator (SQL count(col), not the row count), and avg emits NULL when it is 0.
• float_count — how many contributing values were float; 0 ⇒ sum emits Int, else Float.

Fields

int_sum: i128

float_sum: f64

non_null: i64

float_count: i64

Trait Implementations

impl Clone for ReduceAcc

fn clone(&self) -> ReduceAcc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReduceAcc

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

Formats the value using the given formatter.

impl Default for ReduceAcc

fn default() -> ReduceAcc

Returns the “default value” for a type.

impl PartialEq for ReduceAcc

fn eq(&self, other: &ReduceAcc) -> 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 StructuralPartialEq for ReduceAcc