Struct ExecutionPlan 

pub struct ExecutionPlan {
    pub sql: Arc<str>,
    pub hash: u64,
    pub hint: PlanHint,
    pub estimated_cost: Option<f64>,
    /* private fields */
}

A cached execution plan with optimization hints.

Fields

sql: Arc<str>

The SQL query.

hash: u64

Pre-computed hash for fast lookup.

hint: PlanHint

Execution hint.

estimated_cost: Option<f64>

Estimated cost (if available from EXPLAIN).

Implementations

impl ExecutionPlan

pub fn new(sql: impl AsRef<str>, hint: PlanHint) -> Self

Create a new execution plan.

pub fn with_cost(sql: impl AsRef<str>, hint: PlanHint, cost: f64) -> Self

Create with estimated cost.

pub fn record_execution(&self, duration_us: u64)

Record an execution with timing.

pub fn use_count(&self) -> u64

Get the use count.

pub fn avg_execution_us(&self) -> u64

Get the average execution time in microseconds.

Trait Implementations

impl Debug for ExecutionPlan

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

Formats the value using the given formatter.