pub struct SqlEngine<'a> { /* private fields */ }Expand description
Custom SQL execution engine backed by a DocumentStore reference.
Secondary indexes are built once on construction (O(n) in total block count)
and reused for every query. Commands that do not create a SqlEngine
(mq, list, show, stats …) pay no index-construction cost.
Implementations§
Source§impl<'a> SqlEngine<'a>
impl<'a> SqlEngine<'a>
Sourcepub fn new(store: &'a DocumentStore) -> Result<Self, MqdbError>
pub fn new(store: &'a DocumentStore) -> Result<Self, MqdbError>
Build the engine and its secondary indexes.
Uses cached indexes from DocumentStore::load_all_indexes when
available (O(1) per document); otherwise rebuilds from blocks (O(n)).
Auto Trait Implementations§
impl<'a> !Freeze for SqlEngine<'a>
impl<'a> !RefUnwindSafe for SqlEngine<'a>
impl<'a> !Send for SqlEngine<'a>
impl<'a> !Sync for SqlEngine<'a>
impl<'a> Unpin for SqlEngine<'a>
impl<'a> UnsafeUnpin for SqlEngine<'a>
impl<'a> UnwindSafe for SqlEngine<'a>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
Converts
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
Converts
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more