Enum Expr 

pub enum Expr {
    Literal(Value),
    Column(String),
    QualifiedColumn {
        table: String,
        column: String,
    },
    BinaryOp {
        left: Box<Expr>,
        op: BinOp,
        right: Box<Expr>,
    },
    UnaryOp {
        op: UnaryOp,
        expr: Box<Expr>,
    },
    IsNull(Box<Expr>),
    IsNotNull(Box<Expr>),
    Function {
        name: String,
        args: Vec<Expr>,
    },
    CountStar,
    InSubquery {
        expr: Box<Expr>,
        subquery: Box<SelectStmt>,
        negated: bool,
    },
    InList {
        expr: Box<Expr>,
        list: Vec<Expr>,
        negated: bool,
    },
    Exists {
        subquery: Box<SelectStmt>,
        negated: bool,
    },
    ScalarSubquery(Box<SelectStmt>),
    InSet {
        expr: Box<Expr>,
        values: HashSet<Value>,
        has_null: bool,
        negated: bool,
    },
    Between {
        expr: Box<Expr>,
        low: Box<Expr>,
        high: Box<Expr>,
        negated: bool,
    },
    Like {
        expr: Box<Expr>,
        pattern: Box<Expr>,
        escape: Option<Box<Expr>>,
        negated: bool,
    },
    Case {
        operand: Option<Box<Expr>>,
        conditions: Vec<(Expr, Expr)>,
        else_result: Option<Box<Expr>>,
    },
    Coalesce(Vec<Expr>),
    Cast {
        expr: Box<Expr>,
        data_type: DataType,
    },
    Parameter(usize),
}

Variants

Literal(Value)

Column(String)

QualifiedColumn

Fields

table: String

column: String

BinaryOp

Fields

left: Box<Expr>

op: BinOp

right: Box<Expr>

UnaryOp

Fields

op: UnaryOp

expr: Box<Expr>

IsNull(Box<Expr>)

IsNotNull(Box<Expr>)

Function

Fields

name: String

args: Vec<Expr>

CountStar

InSubquery

Fields

expr: Box<Expr>

subquery: Box<SelectStmt>

negated: bool

InList

Fields

expr: Box<Expr>

list: Vec<Expr>

negated: bool

Exists

Fields

subquery: Box<SelectStmt>

negated: bool

ScalarSubquery(Box<SelectStmt>)

InSet

Fields

expr: Box<Expr>

values: HashSet<Value>

has_null: bool

negated: bool

Between

Fields

expr: Box<Expr>

low: Box<Expr>

high: Box<Expr>

negated: bool

Like

Fields

expr: Box<Expr>

pattern: Box<Expr>

escape: Option<Box<Expr>>

negated: bool

Case

Fields

operand: Option<Box<Expr>>

conditions: Vec<(Expr, Expr)>

else_result: Option<Box<Expr>>

Coalesce(Vec<Expr>)

Cast

Fields

expr: Box<Expr>

data_type: DataType

Parameter(usize)

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.