server::storage

Trait server::storage::Engine [−] [src]

pub trait Engine {
    fn create_table(&mut self) -> Result<(), Error>;
    fn table(&self) -> &Table;
    fn full_scan(&self) -> Result<Rows<Cursor<Vec<u8>>>, Error>;
    fn lookup(&self, column_index: usize, value: (&[u8], Option<usize>), comp: CompType) -> Result<Rows<Cursor<Vec<u8>>>, Error>;
    fn insert_row(&mut self, row_data: &[u8]) -> Result<u64, Error>;
    fn delete(&self, column_index: usize, value: (&[u8], Option<usize>), comp: CompType) -> Result<u64, Error>;
    fn modify(&mut self, constraint_column_index: usize, constraint_value: (&[u8], Option<usize>), comp: CompType, values: &[(usize, &[u8])]) -> Result<u64, Error>;
    fn reorganize(&mut self) -> Result<(), Error>;
    fn reset(&mut self) -> Result<(), Error>;
}

Storage Engine Interface.

A storage engine, like MyISAM and InnoDB, is responsible for reading and writing data to disk, maintain and use indices, check for data corruption and repair corrupt files.

Each table in a database may use a different storage engine.

Required Methods

fn create_table(&mut self) -> Result<(), Error>

writes the table.dat file

fn table(&self) -> &Table

returns the table

fn full_scan(&self) -> Result<Rows<Cursor<Vec<u8>>>, Error>

fn lookup(&self, column_index: usize, value: (&[u8], Option<usize>), comp: CompType) -> Result<Rows<Cursor<Vec<u8>>>, Error>

fn insert_row(&mut self, row_data: &[u8]) -> Result<u64, Error>

fn delete(&self, column_index: usize, value: (&[u8], Option<usize>), comp: CompType) -> Result<u64, Error>

fn modify(&mut self, constraint_column_index: usize, constraint_value: (&[u8], Option<usize>), comp: CompType, values: &[(usize, &[u8])]) -> Result<u64, Error>

fn reorganize(&mut self) -> Result<(), Error>

fn reset(&mut self) -> Result<(), Error>

Implementors