Enum txn_types::OldValue[−][src]

pub enum OldValue {
    Value {
        value: Value,
    },
    ValueTimeStamp {
        start_ts: TimeStamp,
    },
    None,
    Unspecified,
}

OldValue is used by cdc to read the previous value associated with some key during the prewrite process

Variants

Value

A real OldValue

Fields of Value

value: Value

ValueTimeStamp

A timestamp of an old value in case a value is not inlined in Write

Fields of ValueTimeStamp

start_ts: TimeStamp

None

None means we don’t found a previous value

Unspecified

Unspecified means one of the following:

The user doesn’t care about the previous value
We don’t sure if there is a previous value

Implementations

`impl OldValue`[src]

`pub fn valid(&self) -> bool`[src]

`pub fn size(&self) -> usize`[src]

Trait Implementations

`impl Clone for OldValue`[src]

`fn clone(&self) -> OldValue`[src]

`pub fn clone_from(&mut self, source: &Self)`1.0.0 [src]

`impl Debug for OldValue`[src]

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

`impl Default for OldValue`[src]

`fn default() -> Self`[src]

`impl PartialEq<OldValue> for OldValue`[src]

`fn eq(&self, other: &OldValue) -> bool`[src]

`fn ne(&self, other: &OldValue) -> bool`[src]

`impl StructuralPartialEq for OldValue`[src]

Auto Trait Implementations

`impl RefUnwindSafe for OldValue`

`impl Send for OldValue`

`impl Sync for OldValue`

`impl Unpin for OldValue`

`impl UnwindSafe for OldValue`

Blanket Implementations

`impl<T> Any for T where T: 'static + ?Sized,` [src]

`pub fn type_id(&self) -> TypeId`[src]

`impl<T> Borrow<T> for T where T: ?Sized,` [src]

`pub fn borrow(&self) -> &T`[src]

`impl<T> BorrowMut<T> for T where T: ?Sized,` [src]

`pub fn borrow_mut(&mut self) -> &mut T`[src]

`impl<T> From<T> for T`[src]

`pub fn from(t: T) -> T`[src]

`impl<T> Instrument for T`[src]

`pub fn instrument(self, span: Span) -> Instrumented<Self>`[src]

`pub fn in_current_span(self) -> Instrumented<Self>`[src]

`impl<T, U> Into for T where U: From<T>,` [src]

`pub fn into(self) -> U`[src]

`impl<T> Pointable for T`[src]

`pub const ALIGN: usize`[src]

`type Init = T`

The type for initializers.

`pub unsafe fn init(init: <T as Pointable>::Init) -> usize`[src]

`pub unsafe fn deref<'a>(ptr: usize) -> &'a T`[src]

`pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T`[src]

`pub unsafe fn drop(ptr: usize)`[src]

`impl<T> Same<T> for T`[src]

`type Output = T`

Should always be Self

`impl<T> Sealed<T> for T where T: ?Sized,` [src]

`impl<T> SendSyncUnwindSafe for T where T: Send + Sync + UnwindSafe + ?Sized,` [src]

`impl<T> ToOwned for T where T: Clone,` [src]

`type Owned = T`

The resulting type after obtaining ownership.

`pub fn to_owned(&self) -> T`[src]

`pub fn clone_into(&self, target: &mut T)`[src]

`impl<T, U> TryFrom for T where U: Into<T>,` [src]

`type Error = Infallible`

The type returned in the event of a conversion error.

`pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>`[src]

`impl<T, U> TryInto for T where U: TryFrom<T>,` [src]

`type Error = >::Error`

The type returned in the event of a conversion error.

Enum txn_types::OldValue⎘[−][src]

Variants

Fields of Value

Fields of ValueTimeStamp

Implementations

impl OldValue[src]

pub fn valid(&self) -> bool[src]

pub fn size(&self) -> usize[src]

Trait Implementations

impl Clone for OldValue[src]

fn clone(&self) -> OldValue[src]

pub fn clone_from(&mut self, source: &Self)1.0.0[src]

impl Debug for OldValue[src]

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

impl Default for OldValue[src]

fn default() -> Self[src]

impl PartialEq<OldValue> for OldValue[src]

fn eq(&self, other: &OldValue) -> bool[src]

fn ne(&self, other: &OldValue) -> bool[src]

impl StructuralPartialEq for OldValue[src]

Auto Trait Implementations

impl RefUnwindSafe for OldValue

impl Send for OldValue

impl Sync for OldValue

impl Unpin for OldValue

impl UnwindSafe for OldValue

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized, [src]

pub fn type_id(&self) -> TypeId[src]

impl<T> Borrow<T> for T where T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

impl<T> BorrowMut<T> for T where T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

impl<T> Instrument for T[src]

pub fn instrument(self, span: Span) -> Instrumented<Self>[src]

pub fn in_current_span(self) -> Instrumented<Self>[src]

impl<T, U> Into<U> for T where U: From<T>, [src]

pub fn into(self) -> U[src]

impl<T> Pointable for T[src]

pub const ALIGN: usize[src]

type Init = T

pub unsafe fn init(init: <T as Pointable>::Init) -> usize[src]

pub unsafe fn deref<'a>(ptr: usize) -> &'a T[src]

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T[src]

pub unsafe fn drop(ptr: usize)[src]

impl<T> Same<T> for T[src]

type Output = T

impl<T> Sealed<T> for T where T: ?Sized, [src]

impl<T> SendSyncUnwindSafe for T where T: Send + Sync + UnwindSafe + ?Sized, [src]

impl<T> ToOwned for T where T: Clone, [src]

type Owned = T

pub fn to_owned(&self) -> T[src]

pub fn clone_into(&self, target: &mut T)[src]

impl<T, U> TryFrom<U> for T where U: Into<T>, [src]

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

impl<T, U> TryInto<U> for T where U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

impl<V, T> VZip<V> for T where V: MultiLane<T>, [src]

pub fn vzip(self) -> V[src]