Struct IndexManager 

pub struct IndexManager { /* private fields */ }

In-memory physical index registry, independent of catalog persistence.

Implementations

impl IndexManager

pub fn new() -> Self

pub fn create_index( &self, index_def: IndexDef, ) -> Result<(), StorageBackendError>

Build a physical index and register the definition under index_def.name. Returns an error if an index with the same name is already registered.

pub fn drop_index(&self, name: &str) -> Result<bool, StorageBackendError>

pub fn drop_indexes_for_table( &self, table_name: &str, ) -> Result<(), StorageBackendError>

pub fn find_covering_index_name( &self, table_name: &str, column: &str, predicate: &Predicate, ) -> Option<String>

pub fn find_covering_index_with_cost( &self, table_name: &str, column: &str, predicate: &Predicate, ) -> Option<(String, f64)>

Like Self::find_covering_index_name but returns the chosen index’s name together with its scan_cost(predicate) so the caller can require scan_cost < full_scan_cost before committing to the rewrite.

pub fn has_index(&self, name: &str) -> bool

pub fn index_count(&self) -> usize

Trait Implementations

impl Default for IndexManager

fn default() -> IndexManager

Returns the “default value” for a type.