Struct MetaParts 

pub struct MetaParts<'a> {
    pub ep: u8,
    pub sess_id: Cow<'a, str>,
    pub thrd_id: Cow<'a, str>,
    pub username: Cow<'a, str>,
    pub trxid: Cow<'a, str>,
    pub statement: Cow<'a, str>,
    pub appname: Cow<'a, str>,
    pub client_ip: Cow<'a, str>,
}

元数据部分

包含日志记录的所有元数据字段，如会话 ID、用户名等。

Fields

ep: u8

EP（Execution Point）编号，范围 0-255

sess_id: Cow<'a, str>

会话 ID

thrd_id: Cow<'a, str>

线程 ID

username: Cow<'a, str>

用户名

trxid: Cow<'a, str>

事务 ID

statement: Cow<'a, str>

语句 ID

appname: Cow<'a, str>

应用程序名称

client_ip: Cow<'a, str>

客户端 IP 地址（可选）

Trait Implementations

impl<'a> Clone for MetaParts<'a>

fn clone(&self) -> MetaParts<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for MetaParts<'a>

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

Formats the value using the given formatter.

impl<'a> Default for MetaParts<'a>

fn default() -> MetaParts<'a>

Returns the “default value” for a type.

impl<'a> PartialEq for MetaParts<'a>

fn eq(&self, other: &MetaParts<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> StructuralPartialEq for MetaParts<'a>