Trait datafusion::types::AggregateFunction

pub trait AggregateFunction {
    fn name(&self) -> String;
    fn args(&self) -> Vec<Field>;
    fn return_type(&self) -> DataType;
    fn execute(&mut self, args: &[Value]) -> Result<()>;
    fn finish(&self) -> Result<Value>;
}

Aggregate function

Required Methods

fn name(&self) -> String

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

fn return_type(&self) -> DataType

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

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

Implementors

• impl AggregateFunction for CountFunction

• impl AggregateFunction for MaxFunction

• impl AggregateFunction for MinFunction

• impl AggregateFunction for SumFunction