Enum Expr 

pub enum Expr {
    IntegerLiteral(i64),
    FloatLiteral(f64),
    StringLiteral(String),
    BooleanLiteral(bool),
    Null,
    ColumnRef(String),
    FunctionCall {
        name: String,
        args: Vec<Expr>,
    },
    Cast {
        expr: Box<Expr>,
        type_name: String,
    },
    BinaryOp {
        left: Box<Expr>,
        op: String,
        right: Box<Expr>,
    },
    UnaryOp {
        op: String,
        expr: Box<Expr>,
    },
    IsNull {
        expr: Box<Expr>,
        negated: bool,
    },
    InList {
        expr: Box<Expr>,
        list: Vec<Expr>,
        negated: bool,
    },
    Between {
        expr: Box<Expr>,
        low: Box<Expr>,
        high: Box<Expr>,
        negated: bool,
    },
    Nested(Box<Expr>),
    NextVal(String),
    CurrentTimestamp,
    Raw(String),
}

An expression node in the IR.

Variants

IntegerLiteral(i64)

Integer literal (e.g., 42)

FloatLiteral(f64)

Float literal (e.g., 3.14)

StringLiteral(String)

String literal (e.g., 'hello')

BooleanLiteral(bool)

Boolean literal (true/false)

Null

NULL literal

ColumnRef(String)

Column reference (e.g., status)

FunctionCall

Function call (e.g., now(), lower(col))

Fields

name: String

args: Vec<Expr>

Cast

Type cast (e.g., value::integer, CAST(value AS integer))

Fields

expr: Box<Expr>

type_name: String

BinaryOp

Binary operation (e.g., a + b, a AND b)

Fields

left: Box<Expr>

op: String

right: Box<Expr>

UnaryOp

Unary operation (e.g., NOT a, -x)

Fields

op: String

expr: Box<Expr>

IsNull

IS NULL / IS NOT NULL

Fields

expr: Box<Expr>

negated: bool

InList

IN list (e.g., col IN ('a', 'b', 'c'))

Fields

expr: Box<Expr>

list: Vec<Expr>

negated: bool

Between

BETWEEN (e.g., col BETWEEN 1 AND 10)

Fields

expr: Box<Expr>

low: Box<Expr>

high: Box<Expr>

negated: bool

Nested(Box<Expr>)

Parenthesized expression

NextVal(String)

nextval(‘sequence_name’) — PG-specific, removed during transform

CurrentTimestamp

CURRENT_TIMESTAMP (SQLite built-in)

Raw(String)

Raw SQL string for expressions that can’t be decomposed further

Implementations

impl Expr

pub fn to_sql(&self) -> String

Render this expression as a SQL string.

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