Struct mmtkvdb::Db

pub struct Db<K: ?Sized, V: ?Sized, C> { /* private fields */ }

Database handle

These handles are created using DbBuilder builder, which can be passed by (shared) reference to Env::open_db or EnvRw::create_db.

The type arguments K, V, and C reflect the type used for keys and values, and whether duplicate keys are allowed (C being KeysUnique or KeysDuplicate), respectively.

Operations on databases is done using the methods of the Txn trait or TxnRw struct. The database handle must be passed to these methods by (shared) reference.

Using a Db handle in a different environment (or in an environment that has been closed and re-opened) will cause a panic.

Trait Implementations

impl<K: ?Sized, V: ?Sized, C> Clone for Db<K, V, C>where C: Constraint,

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K: Debug + ?Sized, V: Debug + ?Sized, C: Debug> Debug for Db<K, V, C>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<K: ?Sized, V: ?Sized, C> PartialEq<Db<K, V, C>> for Db<K, V, C>

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<K: ?Sized, V: ?Sized, C> Eq for Db<K, V, C>