Struct PreparedPlan 

pub struct PreparedPlan {
    pub stmt: Statement,
    pub statistics_version: u64,
    pub source_tables: Vec<String>,
    pub describe_columns: Vec<ColumnSchema>,
}

One cached plan. The cached stmt is the same one Engine::prepare() would return — parse + clock rewrite + ORDER-BY position resolution + JOIN reorder all already applied.

Fields

stmt: Statement

statistics_version: u64

Statistics version snapshot at prepare time. v6.3.1 compares this against the live statistics version and evicts on mismatch. v6.3.0 stores it but doesn’t consult on lookup.

source_tables: Vec<String>

Tables referenced by stmt (deduplicated, lexical order). v6.3.1 uses this for selective DDL/ANALYZE invalidation.

describe_columns: Vec<ColumnSchema>

Column shape v6.3.3 will populate for Describe statement. v6.3.0 leaves this empty.

Trait Implementations

impl Clone for PreparedPlan

fn clone(&self) -> PreparedPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PreparedPlan

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

Formats the value using the given formatter.