Enum TxError 

pub enum TxError {
    NotStarted,
    AlreadyStarted,
    CommitFailed(String),
    RollbackFailed(String),
    SavepointError(String),
    NestedNotSupported,
    NotActive(TransactionState),
    InvalidSavepointName(String),
    ConnectionTaken,
    MaxNestingDepthExceeded {
        current_depth: u32,
        max_depth: u32,
    },
    DeadlockDetected {
        attempt: u32,
        max_attempts: u32,
    },
}

事务特有错误

Variants

NotStarted

事务未开始

AlreadyStarted

事务已开始

CommitFailed(String)

事务提交失败

RollbackFailed(String)

事务回滚失败

SavepointError(String)

保存点错误

NestedNotSupported

不支持嵌套事务

NotActive(TransactionState)

事务不在 Active 状态（用于 execute/query 等操作前置校验）

InvalidSavepointName(String)

保存点名称非法（包含不支持的字符或以数字开头）

ConnectionTaken

连接已被取走（take_connection 重复调用，或操作时连接已释放）

MaxNestingDepthExceeded

H-8 修复：嵌套事务深度超过限制

current_depth 为当前已嵌套深度（含本次），max_depth 为配置的最大深度。

Fields

current_depth: u32

max_depth: u32

DeadlockDetected

M-8 修复：死锁检测

当事务执行过程中检测到死锁（数据库返回死锁错误码）时返回。 调用方可使用 retry_on_deadlock 包装器自动重试。

Fields

attempt: u32

max_attempts: u32

Trait Implementations

impl Debug for TxError

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

Formats the value using the given formatter.

impl Display for TxError

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

Formats the value using the given formatter.

impl Error for TxError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.