Struct CountAccumulator 

pub struct CountAccumulator { /* private fields */ }

Implementations

impl CountAccumulator

pub fn new() -> Self

Trait Implementations

impl Accumulator for CountAccumulator

fn update_value(&mut self, value: &ScalarValue) -> QuillSQLResult<()>

Updates the accumulator’s state from its input.

fn evaluate(&self) -> QuillSQLResult<ScalarValue>

Returns the final aggregate value, consuming the internal state.

impl Clone for CountAccumulator

fn clone(&self) -> CountAccumulator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CountAccumulator

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

Formats the value using the given formatter.

impl Default for CountAccumulator

fn default() -> Self

Returns the “default value” for a type.