Enum datafusion::physical_plan::functions::Signature

pub enum Signature {
    Variadic(Vec<DataType>),
    VariadicEqual,
    Uniform(usize, Vec<DataType>),
    Exact(Vec<DataType>),
    Any(usize),
    OneOf(Vec<Signature>),
}

A function’s signature, which defines the function’s supported argument types.

Variants

Variadic

arbitrary number of arguments of an common type out of a list of valid types

Tuple Fields of Variadic

0: Vec<DataType>

VariadicEqual

arbitrary number of arguments of an arbitrary but equal type

Uniform

fixed number of arguments of an arbitrary but equal type out of a list of valid types

Tuple Fields of Uniform

0: usize1: Vec<DataType>

Exact

exact number of arguments of an exact type

Tuple Fields of Exact

0: Vec<DataType>

Any

fixed number of arguments of arbitrary types

Tuple Fields of Any

0: usize

OneOf

One of a list of signatures

Tuple Fields of OneOf

0: Vec<Signature>

Trait Implementations

impl Clone for Signature

fn clone(&self) -> Signature

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Signature

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

Formats the value using the given formatter.

impl PartialEq<Signature> for Signature

fn eq(&self, other: &Signature) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Signature) -> bool

This method tests for !=.

impl StructuralPartialEq for Signature