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StorageOp

Enum StorageOp 

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pub enum StorageOp {
    BatchUpsert(UpsertSpec),
    MonotonicUpsert(MonotonicUpsertSpec),
    BatchUpdate(BatchUpdateSpec),
    GuardedBump(GuardedBumpSpec),
    ScopedGuardedBump(ScopedGuardedBumpSpec),
    Get(GetSpec),
    ScopedGet(ScopedGetSpec),
    Scan(ScanSpec),
    BatchDelete(BatchDeleteSpec),
}
Expand description

存储操作(具体 SQL 由 driver 的 Storage 实现构造)

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BatchUpsert(UpsertSpec)

batch upsert:INSERT … ON CONFLICT(conflict_key) DO UPDATE …

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MonotonicUpsert(MonotonicUpsertSpec)

通用单调 MAX-guard 写:仅当 new value > 当前值才写(CAS / 单调寄存器语义,严格 >)。

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BatchUpdate(BatchUpdateSpec)

batch update:UPDATE table SET patch WHERE key_col IN (key_vals)

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GuardedBump(GuardedBumpSpec)

守卫式自增:UPDATE … SET bump_col = bump_col + delta[, set…] WHERE key=? AND ? > guard_col。 通用计数器原语(无 read-modify-write),见 GuardedBumpSpec。

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ScopedGuardedBump(ScopedGuardedBumpSpec)

复合作用域守卫式自增:在 scope + key 精确单行内完成幂等计数与绝对列写。

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Get(GetSpec)

get:SELECT * FROM table WHERE …(单行)

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ScopedGet(ScopedGetSpec)

复合作用域 get:SELECT * FROM table WHERE scope=? AND key=?(单行)

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Scan(ScanSpec)

scan:SELECT * FROM table [LIMIT n](多行,C3)

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BatchDelete(BatchDeleteSpec)

batch delete:DELETE FROM table WHERE scope_col = ? AND key_col IN (key_vals)。 复合 PK 作用域删除(如 channel_member 成员离场:scope=channel_id + key=user_id)。 O(k) 单语句;scope 等值约束绝不跨作用域误删。见 BatchDeleteSpec。

Trait Implementations§

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impl Clone for StorageOp

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fn clone(&self) -> StorageOp

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for StorageOp

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> MaybeSend for T
where T: Send,

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impl<T> MaybeSync for T
where T: Sync,

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more