Struct ExplainPlan 

pub struct ExplainPlan {
    pub scan_type: ScanType,
    pub table: String,
    pub index: Option<String>,
    pub rows: u64,
    pub extra: Vec<String>,
}

解析后的执行计划摘要

Fields

scan_type: ScanType

扫描类型

table: String

涉及的表名（未知时为 "<unknown>"）

index: Option<String>

使用的索引名（全表扫描/未知时为 None）

rows: u64

预估扫描行数

extra: Vec<String>

额外信息（filter/using where 等）

Implementations

impl ExplainPlan

pub fn missing_index(&self, row_threshold: u64) -> bool

缺失索引判断：全表扫描或行数超阈值且未使用索引

Trait Implementations

impl Clone for ExplainPlan

fn clone(&self) -> ExplainPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExplainPlan

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

Formats the value using the given formatter.

impl Eq for ExplainPlan

impl PartialEq for ExplainPlan

fn eq(&self, other: &ExplainPlan) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ExplainPlan