Struct TxnCatalogView 

pub struct TxnCatalogView<'a, S: KVStore> { /* private fields */ }

トランザクション内（オーバーレイ込み）で参照するための Catalog ビュー。

DML/SELECT の実行や Planner の参照用途に使う。書き込み系 API は利用しない前提のため、 Catalog trait の書き込みメソッドは unreachable!() とする。

Implementations

impl<'a, S: KVStore> TxnCatalogView<'a, S>

pub fn new( catalog: &'a PersistentCatalog<S>, overlay: &'a CatalogOverlay, ) -> Self

Trait Implementations

impl<'a, S: KVStore> Catalog for TxnCatalogView<'a, S>

fn create_table(&mut self, _table: TableMetadata) -> Result<(), PlannerError>

Create a new table in the catalog.

fn get_table(&self, name: &str) -> Option<&TableMetadata>

Get a table by name.

fn drop_table(&mut self, _name: &str) -> Result<(), PlannerError>

Drop a table from the catalog.

fn create_index(&mut self, _index: IndexMetadata) -> Result<(), PlannerError>

Create a new index in the catalog.

fn get_index(&self, name: &str) -> Option<&IndexMetadata>

Get an index by name.

fn get_indexes_for_table(&self, table: &str) -> Vec<&IndexMetadata>

Get all indexes for a table.

fn drop_index(&mut self, _name: &str) -> Result<(), PlannerError>

Drop an index from the catalog.

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

Check if a table exists.

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

Check if an index exists.

fn next_table_id(&mut self) -> u32

Generate the next unique table ID.

fn next_index_id(&mut self) -> u32

Generate the next unique index ID.