Struct ExpressionPlan 

pub struct ExpressionPlan {
    pub scalar: ScalarExpr,
    pub subqueries: Vec<QueryPlan>,
}

Executable scalar IR plus every query-valued descendant it owns.

Fields

scalar: ScalarExpr

subqueries: Vec<QueryPlan>

Implementations

impl ExpressionPlan

pub fn lower(expression: Expr) -> Self

pub fn lower_with( expression: Expr, aggregates: &dyn AggregateClassifier, ) -> Self

impl ExpressionPlan

pub fn lower_column_budgeted( expression: &Expr, budget: &MemoryBudget, original: &CancellationToken, invoking: &CancellationToken, ) -> Result<Budgeted<ScalarExpr>, CatalogRetentionError>

Lower a borrowed, validated column expression directly into admitted scalar IR. Destination strings, value payloads, bindings, vector capacities and boxes acquire the supplied allowance before allocation, and the result retains those leases. Both the retained definition’s original cancellation and the invoking reader’s cancellation remain active during lowering. This controls AST-to-IR production only; subsequent type binding and evaluation require their own resource contracts. Query children violate the validated column-expression invariant.

Trait Implementations

impl Clone for ExpressionPlan

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExpressionPlan

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExpressionPlan

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ExpressionPlan

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

where __S: Serializer,

Serialize this value into the given Serde serializer.