Enum HaPanicFunction 

#[non_exhaustive]
pub enum HaPanicFunction {
    Close,
    Write,
    Read,
}

The reason MySQL is invoking the engine-level panic callback.

Mirrors enum ha_panic_function in mysql-server/include/my_base.h. Used only as the argument to Handlerton::panic.

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.

Close

HA_PANIC_CLOSE: close all databases before shutdown.

Write

HA_PANIC_WRITE: unlock and write status.

Read

HA_PANIC_READ: lock and read keyinfo.

Implementations

impl HaPanicFunction

pub const fn from_raw(value: u32) -> Self

Decode the C enum ha_panic_function value. Unknown values map to HaPanicFunction::Close so the engine still observes a defined variant rather than a panic on a forward-compatible MySQL change.

Trait Implementations

impl Clone for HaPanicFunction

fn clone(&self) -> HaPanicFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for HaPanicFunction

impl Debug for HaPanicFunction

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

Formats the value using the given formatter.

impl Eq for HaPanicFunction

impl PartialEq for HaPanicFunction

fn eq(&self, other: &HaPanicFunction) -> 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 HaPanicFunction