Struct rusqlite::vtab::IndexInfo

pub struct IndexInfo(_);

Pass information into and receive the reply from the VTab.best_index method.

(See SQLite doc)

Methods

impl IndexInfo

Important traits for IndexConstraintIter<'a>

impl<'a> Iterator for IndexConstraintIter<'a> type Item = IndexConstraint<'a>;

pub fn constraints(&self) -> IndexConstraintIter

Record WHERE clause constraints.

Important traits for OrderByIter<'a>

impl<'a> Iterator for OrderByIter<'a> type Item = OrderBy<'a>;

pub fn order_bys(&self) -> OrderByIter

Information about the ORDER BY clause.

pub fn num_of_order_by(&self) -> usize

Number of terms in the ORDER BY clause

pub fn constraint_usage(
    &mut self,
    constraint_idx: usize
) -> IndexConstraintUsage

pub fn set_idx_num(&mut self, idx_num: c_int)

Number used to identify the index

pub fn set_order_by_consumed(&mut self, order_by_consumed: bool)

True if output is already ordered

pub fn set_estimated_cost(&mut self, estimated_ost: f64)

Estimated cost of using this index