Struct ComputeDef 

pub struct ComputeDef {
    pub comp_type: String,
    pub has_fn: bool,
    pub has_async_fn: bool,
    pub fn_ref: Option<String>,
    pub agg: Option<Value>,
    pub depends: Vec<String>,
    pub read: Option<Vec<String>>,
}

Fields

comp_type: String

has_fn: bool

has_async_fn: bool

fn_ref: Option<String>

回调标识：Host 经 FnRegistry 把它绑定到实现；缺省 = 计算列 key 名

agg: Option<Value>

归一聚合算子（§9.2(2)）：{"$count": "lessons"} / {"$sum": "lessons.duration"}。 取代旧的 lookup + addFields Mongo 专用形态；SQL / Mongo 走同一语法（执行下推优先）。

depends: Vec<String>

read: Option<Vec<String>>

Trait Implementations

impl Clone for ComputeDef

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComputeDef

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

Formats the value using the given formatter.