Struct Count 

pub struct Count { /* private fields */ }

Implementations

impl Count

pub fn new() -> Self

Trait Implementations

impl Default for Count

fn default() -> Self

Returns the “default value” for a type.

impl Function for Count

fn info(&self) -> &FunctionInfo

fn capabilities(&self) -> &[FunctionCapability]

fn return_type(&self, _input_types: &[Type]) -> Type

fn accepted_types(&self) -> InputTypes

fn propagates_options(&self) -> bool

fn execute( &self, ctx: &FunctionContext<'_>, args: &Columns, ) -> Result<Columns, FunctionError>

fn accumulator( &self, _ctx: &FunctionContext<'_>, ) -> Option<Box<dyn Accumulator>>

fn call( &self, ctx: &FunctionContext<'_>, args: &Columns, ) -> Result<Columns, FunctionError>

Calls the function, automatically propagating Option columns if propagates_options() returns true.