Struct HigherOrderFunction 

pub struct HigherOrderFunction {
    pub func: Arc<HigherOrderUDF>,
    pub args: Vec<Expr>,
}

Invoke a HigherOrderUDF with a set of arguments

Fields

func: Arc<HigherOrderUDF>

The function

args: Vec<Expr>

List of expressions to feed to the functions as arguments

Implementations

impl HigherOrderFunction

pub fn new(func: Arc<HigherOrderUDF>, args: Vec<Expr>) -> Self

Create a new HigherOrderFunction from a HigherOrderUDF

pub fn name(&self) -> &str

pub fn lambda_parameters( &self, schema: &dyn ExprSchema, ) -> Result<Vec<Vec<FieldRef>>>

Invokes the inner function crate::HigherOrderUDFImpl::lambda_parameters using the arguments of this invocation. This expression lambda variables must be already resolved either by coming from the default sql planner or by calling Expr::resolve_lambda_variables or LogicalPlan::resolve_lambda_variables

Trait Implementations

impl Clone for HigherOrderFunction

fn clone(&self) -> HigherOrderFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HigherOrderFunction

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

Formats the value using the given formatter.

impl Eq for HigherOrderFunction

impl Hash for HigherOrderFunction

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

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 HigherOrderFunction

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for HigherOrderFunction

fn partial_cmp(&self, other: &HigherOrderFunction) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.