Type Alias ValueExpr 

pub type ValueExpr = Expr;

Expr restricted to value-producing forms used by INSERT rows.

Aliased Type

pub enum ValueExpr {
    Star,
    QualifiedStar(String),
    Default,
    Column(String),
    QualifiedColumn {
        qualifier: String,
        column: String,
    },
    Literal(Value),
    Param(usize),
    Func {
        name: String,
        binding: Option<FunctionBinding>,
        args: Vec<Expr>,
        distinct: bool,
        order_by: Vec<OrderBy>,
        order_syntax: FunctionCallSyntax,
        filter: Option<Box<Expr>>,
    },
    Array(Vec<Expr>),
    Row(Vec<Expr>),
    CompositeRow {
        items: Vec<Expr>,
        binding: CompositeRowBinding,
    },
    Binary {
        op: BinaryOp,
        lhs: Box<Expr>,
        rhs: Box<Expr>,
    },
    UnaryMinus(Box<Expr>),
    Not(Box<Expr>),
    And(Vec<Expr>),
    Or(Vec<Expr>),
    IsNull {
        expr: Box<Expr>,
        negated: bool,
    },
    Between {
        expr: Box<Expr>,
        low: Box<Expr>,
        high: Box<Expr>,
    },
    InList {
        expr: Box<Expr>,
        list: Vec<Expr>,
        negated: bool,
    },
    WindowCall {
        name: String,
        args: Vec<Expr>,
        spec: Box<WindowSpec>,
        filter: Option<Box<Expr>>,
        modifiers: WindowCallModifiers,
    },
    Case {
        base: Option<Box<Expr>>,
        when: Vec<(Expr, Expr)>,
        else_branch: Option<Box<Expr>>,
    },
    Cast {
        implicit: bool,
        expr: Box<Expr>,
        ty: String,
    },
    ScalarSubquery(Box<SelectStmt>),
    Exists {
        body: Box<SelectStmt>,
        negated: bool,
    },
    InSubquery {
        expr: Box<Expr>,
        body: Box<SelectStmt>,
        negated: bool,
    },
    // some variants omitted
}

Variants

Star

QualifiedStar(String)

Relation-qualified wildcard projection (table.* or alias.*).

Default

DEFAULT in an INSERT/UPDATE assignment is a mutation marker resolved against the target column before expression evaluation.

Column(String)

Unqualified column reference (col).

QualifiedColumn

Qualified column reference (table.col or alias.col).

Fields

qualifier: String

column: String

Literal(Value)

Param(usize)

A positional bind parameter ($1, $2, …).

Func

Function call dispatched through the function registry.

Fields

name: String

binding: Option<FunctionBinding>

args: Vec<Expr>

distinct: bool

func(DISTINCT expr) - only meaningful for aggregate functions. Mirrors PostgreSQL’s agg_distinct.

order_by: Vec<OrderBy>

Ordering expressions from either func(expr ORDER BY ...) or func(expr) WITHIN GROUP (ORDER BY ...); order_syntax preserves their written location.

order_syntax: FunctionCallSyntax

filter: Option<Box<Expr>>

func(...) FILTER (WHERE expr) - aggregate-level row filter.

Array(Vec<Expr>)

SQL array constructor.

Row(Vec<Expr>)

Anonymous SQL row constructor (ROW(...) or (a, b)).

CompositeRow

A stored typed row with creation-time attribute positions and already selected field conversions.

Fields

items: Vec<Expr>

binding: CompositeRowBinding

Binary

lhs op rhs - comparison or arithmetic.

Fields

op: BinaryOp

lhs: Box<Expr>

rhs: Box<Expr>

UnaryMinus(Box<Expr>)

PostgreSQL prefix -, kept distinct from binary subtraction so the operand’s declared numeric width and overflow behavior survive lowering.

Not(Box<Expr>)

NOT expr.

And(Vec<Expr>)

cond_1 AND cond_2 AND ... (n-ary).

Or(Vec<Expr>)

cond_1 OR cond_2 OR ... (n-ary).

IsNull

expr IS NULL / expr IS NOT NULL.

Fields

expr: Box<Expr>

negated: bool

Between

expr BETWEEN low AND high.

Fields

expr: Box<Expr>

low: Box<Expr>

high: Box<Expr>

InList

expr IN (a, b, c) literal list.

Fields

expr: Box<Expr>

list: Vec<Expr>

negated: bool

WindowCall

func(args) [FILTER (WHERE condition)] OVER (PARTITION BY ... ORDER BY ...). Only aggregates accept FILTER.

Fields

name: String

args: Vec<Expr>

spec: Box<WindowSpec>

filter: Option<Box<Expr>>

modifiers: WindowCallModifiers

Case

CASE [base] WHEN cond THEN result ... [ELSE default] END. base lifts simple-form CASE expr WHEN val THEN ... into an optional comparison anchor; searched-form CASE WHEN cond ... leaves it None.

Fields

base: Option<Box<Expr>>

when: Vec<(Expr, Expr)>

else_branch: Option<Box<Expr>>

Cast

CAST(expr AS type). The type name is preserved verbatim so the evaluator can apply the correct coercion.

Fields

implicit: bool

Set by analysis for an implicit coercion retained in stored syntax.

expr: Box<Expr>

ty: String

ScalarSubquery(Box<SelectStmt>)

(SELECT ...) query expression: ordinary scalar consumers select one column; a multiple-column SET target consumes the positional result.

Exists

EXISTS (SELECT ...) – truthy when the body produces at least one row.

Fields

body: Box<SelectStmt>

negated: bool

InSubquery

expr [NOT] IN (SELECT ...) set membership against a subquery. Evaluator runs the body once per top-level expression and tests membership.

Fields

expr: Box<Expr>

body: Box<SelectStmt>

negated: bool