Struct datafusion_expr::expr::Case

pub struct Case {
    pub expr: Option<Box<Expr>>,
    pub when_then_expr: Vec<(Box<Expr>, Box<Expr>)>,
    pub else_expr: Option<Box<Expr>>,
}

CASE expression

Fields

expr: Option<Box<Expr>>

Optional base expression that can be compared to literal values in the “when” expressions

when_then_expr: Vec<(Box<Expr>, Box<Expr>)>

One or more when/then expressions

else_expr: Option<Box<Expr>>

Optional “else” expression

Implementations

impl Case

pub fn new( expr: Option<Box<Expr>>, when_then_expr: Vec<(Box<Expr>, Box<Expr>)>, else_expr: Option<Box<Expr>> ) -> Self

Create a new Case expression

Trait Implementations

impl Clone for Case

fn clone(&self) -> Case

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Case

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

Formats the value using the given formatter.

impl Hash for Case

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<Case> for Case

fn eq(&self, other: &Case) -> 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 Case

impl StructuralEq for Case

impl StructuralPartialEq for Case