Struct sp_database::MemDb

source ·
pub struct MemDb(_);
Expand description

This implements Database as an in-memory hash map. commit is not atomic.

Implementations

Create a new instance

Count number of values in a column

Trait Implementations

Commit the transaction to the database atomically. Any further calls to get or lookup will reflect the new state. Read more
Retrieve the value previously stored against key or None if key is not currently in the database. Read more
Check if the value exists in the database without retrieving it.
Check value size in the database possibly without retrieving it.
Call f with the value previously stored against key. Read more
Check if database supports internal ref counting for state data. Read more
Remove a possible path-prefix from the key. Read more
Returns the “default value” for a type. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.