Enum EngineError 

#[non_exhaustive]
pub enum EngineError {
    EndOfFile,
    WrongCommand,
    Unsupported,
    InvalidName,
    Internal,
}

Errors a storage engine can return; each maps to a MySQL HA_ERR_* code

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

EndOfFile

End of a table or index scan, returned from StorageEngine::rnd_next when the scan is exhausted.

WrongCommand

The engine does not support the requested operation

Unsupported

The requested operation is unsupported on this engine, mapped to HA_ERR_UNSUPPORTED. Distinct from WrongCommand: MySQL uses this code for capability gaps such as bulk-load execution that the engine has not opted into.

InvalidName

The supplied table or schema name is not valid UTF-8 or otherwise unusable. Mapped to HA_ERR_WRONG_TABLE_NAME so operators see a name-level diagnostic instead of a generic internal error.

Internal

Generic internal error; prefer a more specific variant when possible

Implementations

impl EngineError

pub fn to_mysql_errno(self) -> i32

Convert to the matching MySQL HA_ERR_* integer expected at the extern "C" boundary.

Trait Implementations

impl Clone for EngineError

fn clone(&self) -> EngineError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EngineError

impl Debug for EngineError

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

Formats the value using the given formatter.

impl Display for EngineError

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

Formats the value using the given formatter.

impl Eq for EngineError

impl Error for EngineError

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.

impl PartialEq for EngineError

fn eq(&self, other: &EngineError) -> 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 StructuralPartialEq for EngineError