Enum datafusion::rel::Expr

pub enum Expr {
    Column(usize),
    Literal(ScalarValue),
    BinaryExpr {
        left: Box<Expr>,
        op: Operator,
        right: Box<Expr>,
    },
    Sort {
        expr: Box<Expr>,
        asc: bool,
    },
    ScalarFunction {
        name: String,
        args: Vec<Expr>,
    },
}

Relation Expression

Variants

Column(usize)

index into a value within the row or complex value

Literal(ScalarValue)

literal value

BinaryExpr

binary expression e.g. "age > 21"

Fields of BinaryExpr

left: Box<Expr>
op: Operator
right: Box<Expr>

Sort

sort expression

Fields of Sort

expr: Box<Expr>
asc: bool

ScalarFunction

scalar function

Fields of ScalarFunction

name: String
args: Vec<Expr>

Methods

impl Expr

pub fn eq(&self, other: &Expr) -> Expr

pub fn gt(&self, other: &Expr) -> Expr

pub fn lt(&self, other: &Expr) -> Expr

Trait Implementations

impl Debug for Expr

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for Expr

fn clone(&self) -> Expr

Returns a copy of the value.

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

Performs copy-assignment from source.