Enum UndoState 

pub enum UndoState {
    Active,
    Cached,
    ToFree,
    ToPurge,
    Prepared,
    Unknown(u16),
}

Undo segment states.

Variants

Active

Active transaction is using this segment

Cached

Cached for reuse

ToFree

Insert undo segment can be freed

ToPurge

Update undo segment will not be freed (has delete marks)

Prepared

Prepared transaction undo

Unknown(u16)

Unknown state

Implementations

impl UndoState

pub fn from_u16(value: u16) -> Self

Convert a raw u16 value from the undo segment header to an UndoState.

pub fn name(&self) -> &'static str

Returns the MySQL source-style name for this undo state.

Trait Implementations

impl Clone for UndoState

fn clone(&self) -> UndoState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UndoState

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

Formats the value using the given formatter.

impl PartialEq for UndoState

fn eq(&self, other: &UndoState) -> 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 Serialize for UndoState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for UndoState

impl Eq for UndoState

impl StructuralPartialEq for UndoState