Enum SqlExpr 

pub enum SqlExpr {
    Ident(String),
    Number(String),
    StringLit(String),
    Bool(bool),
    BinaryOp {
        left: Box<SqlExpr>,
        op: BinOp,
        right: Box<SqlExpr>,
    },
    UnaryOp {
        op: UnaryOp,
        operand: Box<SqlExpr>,
    },
    FnCall {
        name: String,
        args: Vec<SqlExpr>,
    },
    Paren(Box<SqlExpr>),
}

A parsed SQL expression node.

Variants

Ident(String)

Column reference or SQL keyword (e.g. price, COALESCE).

Number(String)

Numeric literal (e.g. 42, 3.14).

StringLit(String)

String literal (e.g. "hello").

Bool(bool)

Boolean literal (true / false).

BinaryOp

Binary operation (e.g. price * quantity).

Fields

left: Box<SqlExpr>

Left-hand side.

op: BinOp

Operator.

right: Box<SqlExpr>

Right-hand side.

UnaryOp

Unary operation (e.g. -amount).

Fields

op: UnaryOp

Operator.

operand: Box<SqlExpr>

Operand.

FnCall

Function call (e.g. COALESCE(a, b)).

Fields

name: String

Function name.

args: Vec<SqlExpr>

Argument list.

Paren(Box<SqlExpr>)

Parenthesised sub-expression.

Implementations

impl SqlExpr

pub fn to_sql_mapped<F>(&self, map_field: &F) -> String

where F: Fn(&str) -> String,

Render this expression, mapping logical field identifiers to their physical database column names using the provided function.

Trait Implementations

impl Clone for SqlExpr

fn clone(&self) -> SqlExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SqlExpr

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

Formats the value using the given formatter.

impl Display for SqlExpr

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

Formats the value using the given formatter.

impl PartialEq for SqlExpr

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