Struct TotalAccumulator 

pub struct TotalAccumulator { /* private fields */ }

Accumulator for TOTAL (SUM that returns 0.0 on empty/all-NULL input).

Implementations

impl TotalAccumulator

pub fn new() -> Self

Create a new total accumulator.

Trait Implementations

impl Accumulator for TotalAccumulator

fn update(&mut self, value: Option<SqlValue>) -> Result<()>

Update the accumulator with a new value (None for COUNT(*) rows).

fn finalize(&self) -> Result<SqlValue>

Finalize the accumulator and return the resulting SqlValue.

fn clone_box(&self) -> Box<dyn Accumulator>

Clone the accumulator as a trait object.

impl Clone for TotalAccumulator

fn clone(&self) -> TotalAccumulator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TotalAccumulator

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

Formats the value using the given formatter.

impl Default for TotalAccumulator

fn default() -> Self

Returns the “default value” for a type.