Struct sqlx_core::common::StatementCache

pub struct StatementCache<T> { /* private fields */ }

A cache for prepared statements. When full, the least recently used statement gets removed.

Implementations

impl<T> StatementCache<T>

pub fn new(capacity: usize) -> Self

Create a new cache with the given capacity.

pub fn get_mut(&mut self, k: &str) -> Option<&mut T>

Returns a mutable reference to the value corresponding to the given key in the cache, if any.

pub fn insert(&mut self, k: &str, v: T) -> Option<T>

Inserts a new statement to the cache, returning the least recently used statement id if the cache is full, or if inserting with an existing key, the replaced existing statement.

pub fn len(&self) -> usize

The number of statements in the cache.

pub fn remove_lru(&mut self) -> Option<T>

Removes the least recently used item from the cache.

pub fn clear(&mut self)

Clear all cached statements from the cache.

pub fn contains_key(&mut self, k: &str) -> bool

True if cache has a value for the given key.

pub fn capacity(&self) -> usize

Returns the maximum number of statements the cache can hold.

pub fn is_enabled(&self) -> bool

Returns true if the cache capacity is more than 0.

Trait Implementations

impl<T: Debug> Debug for StatementCache<T>

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

Formats the value using the given formatter.