Struct PluginContext 

pub struct PluginContext {
    pub stage: ExecutionStage,
    pub sql: String,
    pub parameters: Vec<Value>,
    pub started_at: Option<Instant>,
    pub elapsed: Option<Duration>,
    pub affected_rows: Option<usize>,
    pub metadata: HashMap<String, Value>,
}

插件上下文（携带操作信息）

Fields

stage: ExecutionStage

执行阶段

sql: String

SQL 语句（可被插件修改）

parameters: Vec<Value>

绑定参数

started_at: Option<Instant>

执行开始时间（用于慢查询检测）

elapsed: Option<Duration>

执行耗时（After 阶段才有）

affected_rows: Option<usize>

影响行数（After 阶段才有）

metadata: HashMap<String, Value>

自定义元数据

Implementations

impl PluginContext

pub fn new(stage: ExecutionStage, sql: impl Into<String>) -> Self

创建上下文

pub fn with_parameters(self, params: Vec<Value>) -> Self

设置参数

pub fn with_start_time(self, instant: Instant) -> Self

设置开始时间

pub fn with_elapsed(self, elapsed: Duration) -> Self

设置耗时

pub fn with_affected_rows(self, rows: usize) -> Self

设置影响行数

pub fn set_metadata(&mut self, key: impl Into<String>, value: Value)

添加元数据

pub fn get_metadata(&self, key: &str) -> Option<&Value>

获取元数据

Trait Implementations

impl Clone for PluginContext

fn clone(&self) -> PluginContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PluginContext

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

Formats the value using the given formatter.