Struct RelAst 

pub struct RelAst {
    pub fields: Vec<String>,
    pub relations: Vec<(String, RelAst)>,
    pub params: HashMap<String, String>,
}

关系节点。relations 用 Vec 保序：pipeline 阶段数组顺序依赖 GQL 中的出现顺序。

Fields

fields: Vec<String>

relations: Vec<(String, RelAst)>

params: HashMap<String, String>

Implementations

impl RelAst

pub fn to_value(&self) -> Value

pub fn from_value(v: &Value) -> Result<RelAst, String>

从 [to_value] 产出的 JSON 重建（供 finalize_query 从 plan.postprocess 还原 AST）

Trait Implementations

impl Clone for RelAst

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 RelAst

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

Formats the value using the given formatter.