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BatchDeleteSpec

Struct BatchDeleteSpec 

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pub struct BatchDeleteSpec {
    pub table: &'static str,
    pub scope_col: &'static str,
    pub scope_val: SqlValue,
    pub key_col: &'static str,
    pub key_vals: Vec<SqlValue>,
}
Expand description

BatchDelete 规格:DELETE FROM table WHERE scope_col = ? AND key_col IN (key_vals)。

复合 PK 作用域删除(如 channel_member:scope=channel_id 等值 + key=user_id IN 列表)—— 表名 / 列名编译期常量(core 不解释含义,守 HX-C001),单语句 O(k) 删 k 行。scope 等值约束 绝不跨作用域误删(无 scope 会把该 user 从所有 channel 删掉)。key_vals 空 → 上层应不产 op。

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§table: &'static str

目标表名(编译期常量)

§scope_col: &'static str

作用域列名(等值约束,编译期常量)—— 复合 PK 第一段,如 channel_id。

§scope_val: SqlValue

作用域运行时值(定位作用域;core 不解析含义)

§key_col: &'static str

IN-list 列名(编译期常量)—— 复合 PK 第二段,如 user_id。

§key_vals: Vec<SqlValue>

待删行的 key 运行时值列表

Trait Implementations§

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impl Clone for BatchDeleteSpec

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fn clone(&self) -> BatchDeleteSpec

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 BatchDeleteSpec

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

Formats the value using the given formatter. Read more

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impl<T> Any for T
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Gets the TypeId of self. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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