Struct NPlusOneAlert 

pub struct NPlusOneAlert {
    pub template: String,
    pub table: String,
    pub query_count: usize,
    pub time_span_ms: u64,
    pub suggestion: String,
}

N+1 告警

当检测到 N+1 问题时生成，包含模板、表名、查询次数、时间跨度与建议。

字段

• template：SQL 模板（参数替换为 ?）
• table：涉及的表名
• query_count：查询次数
• time_span_ms：时间跨度（毫秒）
• suggestion：with() 使用建议

示例

use sz_rust_core::relation::n_plus_one::{NPlusOneAlert, suggest_with_usage};

let alert = NPlusOneAlert::new(
    "SELECT * FROM orders WHERE user_id = ?",
    "orders",
    10,
    500,
);
assert_eq!(alert.query_count, 10);
assert!(alert.suggestion.contains("with"));

Fields

template: String

SQL 模板（参数替换为 ?）

table: String

涉及的表名

query_count: usize

查询次数

time_span_ms: u64

时间跨度（毫秒）

suggestion: String

with() 使用建议

Implementations

impl NPlusOneAlert

pub fn new( template: &str, table: &str, query_count: usize, time_span_ms: u64, ) -> NPlusOneAlert

创建新的 N+1 告警

pub fn template(&self) -> &str

获取 SQL 模板

pub fn table(&self) -> &str

获取表名

pub fn query_count(&self) -> usize

获取查询次数

pub fn time_span_ms(&self) -> u64

获取时间跨度（毫秒）

pub fn suggestion(&self) -> &str

获取建议

Trait Implementations

impl Clone for NPlusOneAlert

fn clone(&self) -> NPlusOneAlert

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NPlusOneAlert

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

Formats the value using the given formatter.

impl Eq for NPlusOneAlert

impl PartialEq for NPlusOneAlert

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for NPlusOneAlert