Enum Expr 

pub enum Expr {
    Wildcard,
    Column(String),
    Literal(Literal),
    Function(FunctionCall),
    Window(WindowFunction),
    BinaryOp(Box<BinaryOp>),
    UnaryOp(Box<UnaryOp>),
    Paren(Box<Self>),
}

An expression in BQL.

Variants

Wildcard

Wildcard (*).

Column(String)

Column reference.

Literal(Literal)

Literal value.

Function(FunctionCall)

Function call.

Window(WindowFunction)

Window function call (with OVER clause).

BinaryOp(Box<BinaryOp>)

Binary operation.

UnaryOp(Box<UnaryOp>)

Unary operation.

Paren(Box<Self>)

Parenthesized expression.

Implementations

impl Expr

pub fn column(name: impl Into<String>) -> Self

Create a column reference.

pub fn string(s: impl Into<String>) -> Self

Create a string literal.

pub const fn number(n: Decimal) -> Self

Create a number literal.

pub const fn integer(n: i64) -> Self

Create an integer literal.

pub const fn date(d: NaiveDate) -> Self

Create a date literal.

pub const fn boolean(b: bool) -> Self

Create a boolean literal.

pub const fn null() -> Self

Create a NULL literal.

pub fn function(name: impl Into<String>, args: Vec<Self>) -> Self

Create a function call.

pub fn binary(left: Self, op: BinaryOperator, right: Self) -> Self

Create a binary operation.

pub fn unary(op: UnaryOperator, operand: Self) -> Self

Create a unary operation.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl PartialEq for Expr

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