Struct SubqueryExecutor 

pub struct SubqueryExecutor { /* private fields */ }

Subquery executor handles evaluation of nested queries

Implementations

impl SubqueryExecutor

pub fn new(num_subqueries: usize) -> SubqueryExecutor

Create new executor with space for n subqueries

pub fn eval_exists<F>( &mut self, def: &SubqueryDef, outer_binding: &Binding, execute_subquery: F, ) -> bool

where F: FnOnce(&Binding) -> Vec<Binding>,

Evaluate an EXISTS subquery

pub fn eval_scalar<F>( &mut self, def: &SubqueryDef, outer_binding: &Binding, result_var: &Var, execute_subquery: F, ) -> Option<Value>

where F: FnOnce(&Binding) -> Vec<Binding>,

Evaluate a scalar subquery

pub fn eval_in<F>( &mut self, def: &SubqueryDef, outer_binding: &Binding, check_value: &Value, result_var: &Var, execute_subquery: F, ) -> bool

where F: FnOnce(&Binding) -> Vec<Binding>,

Evaluate an IN subquery

pub fn eval_any<F>( &mut self, def: &SubqueryDef, outer_binding: &Binding, check_value: &Value, op: CompareOp, result_var: &Var, execute_subquery: F, ) -> bool

where F: FnOnce(&Binding) -> Vec<Binding>,

Evaluate an ANY subquery

pub fn eval_all<F>( &mut self, def: &SubqueryDef, outer_binding: &Binding, check_value: &Value, op: CompareOp, result_var: &Var, execute_subquery: F, ) -> bool

where F: FnOnce(&Binding) -> Vec<Binding>,

Evaluate an ALL subquery

pub fn reset(&mut self)

Reset cache (for new execution)

pub fn is_cached(&self, id: usize) -> bool

Check if a subquery is cached