Trait datafusion::types::ScalarFunction

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

Scalar function

Required Methods

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

Implementors

• impl ScalarFunction for STAsText

• impl ScalarFunction for STPointFunc

• impl ScalarFunction for SqrtFunction