Struct ExprMatch 

pub struct ExprMatch {
    pub subject: Box<Expr>,
    pub arms: Vec<MatchArm>,
    pub else_expr: Box<Expr>,
}

A match expression that dispatches on a subject expression.

Each arm matches the subject against a constant value pattern and evaluates the corresponding expression. Expr::Match is never serialized to SQL — it is either evaluated in the engine (for writes) or eliminated by the simplifier before the plan stage (for reads/queries).

Fields

subject: Box<Expr>

The expression to dispatch on.

arms: Vec<MatchArm>

The match arms, in order.

else_expr: Box<Expr>

Fallback expression evaluated when no arm matches.

Trait Implementations

impl Clone for ExprMatch

fn clone(&self) -> ExprMatch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExprMatch

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

Formats the value using the given formatter.

impl From<ExprMatch> for Expr

fn from(value: ExprMatch) -> Self

Converts to this type from the input type.

impl PartialEq for ExprMatch

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