Struct ckb_db_migration::Migrations

pub struct Migrations { /* private fields */ }

TODO(doc): @quake

Implementations

impl Migrations

pub fn new() -> Self

TODO(doc): @quake

pub fn add_migration(&mut self, migration: Box<dyn Migration>)

TODO(doc): @quake

pub fn check(&self, db: &ReadOnlyDB) -> Ordering

Check if database’s version is matched with the executable binary version.

Returns

• Less: The database version is less than the matched version of the executable binary. Requires migration.
• Equal: The database version is matched with the executable binary version.
• Greater: The database version is greater than the matched version of the executable binary. Requires upgrade the executable binary.

pub fn expensive(&self, db: &ReadOnlyDB) -> bool

Check if the migrations will consume a lot of time.

pub fn init_db_version(&self, db: &RocksDB) -> Result<(), Error>

Initial db version

pub fn migrate(&self, db: RocksDB) -> Result<RocksDB, Error>

TODO(doc): @quake

Trait Implementations

impl Default for Migrations

fn default() -> Migrations

Returns the “default value” for a type.