Struct SumAccumulator 

pub struct SumAccumulator { /* private fields */ }

Accumulator for SQL sum() aggregate with SQLite overflow semantics.

Unlike expression arithmetic (which promotes to REAL on overflow), sum() raises an error on integer overflow only if all non-NULL inputs remain in the integer accumulator. A later REAL input suppresses the overflow error and returns the approximate REAL sum, matching C sqlite3 behavior.

Implementations

impl SumAccumulator

pub const fn new() -> Self

Create a new accumulator.

pub fn accumulate(&mut self, val: &SqliteValue)

Add a value to the running sum.

pub fn finish(&self) -> Result<SqliteValue, SumOverflowError>

Finalize the sum. Returns Err if integer overflow occurred while the accumulator stayed integer, Ok(NULL) if no non-NULL values were seen, or the sum value.

Trait Implementations

impl Clone for SumAccumulator

fn clone(&self) -> SumAccumulator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SumAccumulator

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

Formats the value using the given formatter.

impl Default for SumAccumulator

fn default() -> Self

Returns the “default value” for a type.