Enum PlanExpression 

pub enum PlanExpression {
    Column {
        table: Option<String>,
        name: String,
        data_type: DataType,
    },
    Literal(PlanLiteral),
    BinaryOp {
        left: Box<PlanExpression>,
        op: PlanBinaryOp,
        right: Box<PlanExpression>,
    },
    UnaryOp {
        op: PlanUnaryOp,
        expr: Box<PlanExpression>,
    },
    Function {
        name: String,
        args: Vec<PlanExpression>,
        return_type: DataType,
    },
    Cast {
        expr: Box<PlanExpression>,
        target_type: DataType,
    },
    IsNull {
        expr: Box<PlanExpression>,
        negated: bool,
    },
    Case {
        operand: Option<Box<PlanExpression>>,
        conditions: Vec<(PlanExpression, PlanExpression)>,
        else_result: Option<Box<PlanExpression>>,
    },
    InList {
        expr: Box<PlanExpression>,
        list: Vec<PlanExpression>,
        negated: bool,
    },
    Between {
        expr: Box<PlanExpression>,
        low: Box<PlanExpression>,
        high: Box<PlanExpression>,
        negated: bool,
    },
    Like {
        expr: Box<PlanExpression>,
        pattern: Box<PlanExpression>,
        negated: bool,
    },
    InSubquery {
        expr: Box<PlanExpression>,
        subquery: Box<PlanNode>,
        negated: bool,
    },
    Exists {
        subquery: Box<PlanNode>,
        negated: bool,
    },
    ScalarSubquery(Box<PlanNode>),
    Placeholder(usize),
}

Expression in a query plan.

Variants

Column

Fields

table: Option<String>

name: String

data_type: DataType

Literal(PlanLiteral)

BinaryOp

Fields

left: Box<PlanExpression>

op: PlanBinaryOp

right: Box<PlanExpression>

UnaryOp

Fields

op: PlanUnaryOp

expr: Box<PlanExpression>

Function

Fields

name: String

args: Vec<PlanExpression>

return_type: DataType

Cast

Fields

expr: Box<PlanExpression>

target_type: DataType

IsNull

Fields

expr: Box<PlanExpression>

negated: bool

Case

CASE expression

Fields

operand: Option<Box<PlanExpression>>

conditions: Vec<(PlanExpression, PlanExpression)>

else_result: Option<Box<PlanExpression>>

InList

IN list expression (e.g., x IN (1, 2, 3))

Fields

expr: Box<PlanExpression>

list: Vec<PlanExpression>

negated: bool

Between

BETWEEN expression (e.g., x BETWEEN 1 AND 10)

Fields

expr: Box<PlanExpression>

low: Box<PlanExpression>

high: Box<PlanExpression>

negated: bool

Like

LIKE pattern matching expression

Fields

expr: Box<PlanExpression>

pattern: Box<PlanExpression>

negated: bool

InSubquery

IN subquery expression (e.g., x IN (SELECT y FROM t))

Fields

expr: Box<PlanExpression>

subquery: Box<PlanNode>

negated: bool

Exists

EXISTS subquery expression

Fields

subquery: Box<PlanNode>

negated: bool

ScalarSubquery(Box<PlanNode>)

Scalar subquery (returns single value)

Placeholder(usize)

Placeholder for parameterized queries ($1, $2, etc.)

Trait Implementations

impl Clone for PlanExpression

fn clone(&self) -> PlanExpression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PlanExpression

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

Formats the value using the given formatter.