Struct rustdb::Database

pub struct Database {

    pub apd: AccessPagedData,
    pub builtins: Arc<BuiltinMap>,
    pub sys_schema: Rc<Table>,
    pub sys_table: Rc<Table>,
    pub sys_column: Rc<Table>,
    pub sys_index: Rc<Table>,
    pub sys_index_col: Rc<Table>,
    pub sys_function: Rc<Table>,
    pub schemas: RefCell<FxHashMap<String, i64>>,
    pub tables: RefCell<FxHashMap<ObjRef, Rc<Table>>>,
    pub functions: RefCell<FxHashMap<ObjRef, Rc<Function>>>,
    pub lastid: Cell<i64>,
    pub err: Cell<bool>,
    pub is_new: bool,
    pub function_reset: Cell<bool>,
    /* private fields */
}

Database with SQL-like interface.

Fields

apd: AccessPagedData

Page storage.

builtins: Arc<BuiltinMap>

Defined builtin functions.

sys_schema: Rc<Table>

Schema table.

sys_table: Rc<Table>

Table table.

sys_column: Rc<Table>

Column definitions table.

sys_index: Rc<Table>

Index table.

sys_index_col: Rc<Table>

Index column definitions.

sys_function: Rc<Table>

Function (FN) definitions.

schemas: RefCell<FxHashMap<String, i64>>

Cache of loaded Schemas.

tables: RefCell<FxHashMap<ObjRef, Rc<Table>>>

Cache of loaded Tables.

functions: RefCell<FxHashMap<ObjRef, Rc<Function>>>

Cache of loaded Functions.

lastid: Cell<i64>

Last id generated by INSERT.

err: Cell<bool>

Has there been an error since last save?

is_new: bool

Is the database new?

function_reset: Cell<bool>

Flag to reset the functions cache after save.

Implementations

impl Database

pub fn new(apd: AccessPagedData, initsql: &str, builtins: Arc<BuiltinMap>) -> DB

Construct a new DB, based on the specified file. initsql is used to initialise a new database. builtins specifies the functions callable in SQL code such as SUBSTR, REPLACE etc.

pub fn run(self: &DB, source: &str, tr: &mut dyn Transaction)

Run a batch of SQL.

pub fn changed(self: &DB) -> bool

Test whether there are unsaved changes.

pub fn save(self: &DB) -> usize

Save updated tables to underlying file ( or rollback if there was an error ). Returns the number of logical pages that were updated.

pub fn get_table(self: &DB, name: &ObjRef) -> Option<Rc<Table>>

Get the named table.

pub fn table(self: &DB, schema: &str, name: &str) -> Rc<Table>

Get the named table ( panics if it does not exist ).

pub fn verify(self: &DB) -> String

Verify the page structure of the database.

pub fn renumber(self: &DB)

Renumber pages.

Trait Implementations

impl Drop for Database

fn drop(&mut self)

Clear function instructions to avoid leaking memory.