Enum Expression 

pub enum Expression {
    Column(String),
    QualifiedColumn(String, String),
    Literal(SqlValue),
    BinaryOp {
        left: Box<Expression>,
        op: BinaryOperator,
        right: Box<Expression>,
    },
    UnaryOp {
        op: UnaryOperator,
        expr: Box<Expression>,
    },
    Function {
        name: String,
        args: Vec<Expression>,
        distinct: bool,
    },
    Aggregate {
        func: AggregateFunction,
        expr: Box<Expression>,
        distinct: bool,
    },
    Case {
        operand: Option<Box<Expression>>,
        when_clauses: Vec<(Expression, Expression)>,
        else_clause: Option<Box<Expression>>,
    },
    Subquery(Box<SelectStatement>),
    InList {
        expr: Box<Expression>,
        list: Vec<Expression>,
        negated: bool,
    },
    Between {
        expr: Box<Expression>,
        low: Box<Expression>,
        high: Box<Expression>,
        negated: bool,
    },
    IsNull {
        expr: Box<Expression>,
        negated: bool,
    },
    Star,
}

Expression in SQL AST

Variants

Column(String)

Column reference

QualifiedColumn(String, String)

Qualified column (table.column)

Literal(SqlValue)

Literal value

BinaryOp

Binary operation

Fields

left: Box<Expression>

op: BinaryOperator

right: Box<Expression>

UnaryOp

Unary operation

Fields

op: UnaryOperator

expr: Box<Expression>

Function

Function call

Fields

name: String

args: Vec<Expression>

distinct: bool

Aggregate

Aggregate function

Fields

func: AggregateFunction

expr: Box<Expression>

distinct: bool

Case

CASE expression

Fields

operand: Option<Box<Expression>>

when_clauses: Vec<(Expression, Expression)>

else_clause: Option<Box<Expression>>

Subquery(Box<SelectStatement>)

Subquery

InList

IN expression

Fields

expr: Box<Expression>

list: Vec<Expression>

negated: bool

Between

BETWEEN expression

Fields

expr: Box<Expression>

low: Box<Expression>

high: Box<Expression>

negated: bool

IsNull

IS NULL

Fields

expr: Box<Expression>

negated: bool

Star

Star (*)

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> 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 Serialize for Expression

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Expression