Struct datafusion::functions::count::CountFunction

pub struct CountFunction { /* fields omitted */ }

Methods

impl CountFunction

pub fn new() -> Self

Trait Implementations

impl AggregateFunction for CountFunction

fn name(&self) -> String

Important traits for Vec<u8>

impl Write for Vec<u8>

fn args(&self) -> Vec<Field>

fn return_type(&self) -> DataType

fn execute(&mut self, args: &[Value]) -> Result<()>

fn finish(&self) -> Result<Value>