Struct datafusion::logical_expr::expr::ScalarFunction

pub struct ScalarFunction {
    pub func_def: ScalarFunctionDefinition,
    pub args: Vec<Expr>,
}

ScalarFunction expression invokes a built-in scalar function

Fields

func_def: ScalarFunctionDefinition

The function

args: Vec<Expr>

List of expressions to feed to the functions as arguments

Implementations

impl ScalarFunction

pub fn name(&self) -> &str

impl ScalarFunction

pub fn new_udf(udf: Arc<ScalarUDF>, args: Vec<Expr>) -> ScalarFunction

Create a new ScalarFunction expression with a user-defined function (UDF)

pub fn new_func_def( func_def: ScalarFunctionDefinition, args: Vec<Expr> ) -> ScalarFunction

Create a new ScalarFunction expression with a user-defined function (UDF)

Trait Implementations

impl Clone for ScalarFunction

fn clone(&self) -> ScalarFunction

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ScalarFunction

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

Formats the value using the given formatter.

impl Hash for ScalarFunction

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ScalarFunction

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ScalarFunction

impl StructuralPartialEq for ScalarFunction