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WalRecord

sochdb_kernel::wal

Struct WalRecord 

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pub struct WalRecord {
    pub lsn: LogSequenceNumber,
    pub prev_lsn: LogSequenceNumber,
    pub txn_id: TransactionId,
    pub record_type: WalRecordType,
    pub page_id: Option<PageId>,
    pub redo_data: Bytes,
    pub undo_data: Bytes,
    pub checksum: u32,
}
Expand description

WAL record

Fields§

§lsn: LogSequenceNumber

Log sequence number

§prev_lsn: LogSequenceNumber

Previous LSN for this transaction (for undo chain)

§txn_id: TransactionId

Transaction ID

§record_type: WalRecordType

Record type

§page_id: Option<PageId>

Page ID (for page-level operations)

§redo_data: Bytes

Redo data

§undo_data: Bytes

Undo data (for compensation)

§checksum: u32

Checksum

Implementations§

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impl WalRecord

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pub fn new( lsn: LogSequenceNumber, prev_lsn: LogSequenceNumber, txn_id: TransactionId, record_type: WalRecordType, page_id: Option<PageId>, redo_data: Bytes, undo_data: Bytes, ) -> Self

Create a new WAL record

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pub fn serialize(&self) -> Bytes

Serialize to bytes

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pub fn deserialize(data: &[u8]) -> KernelResult<Self>

Deserialize from bytes

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pub fn size(&self) -> usize

Get serialized size

Trait Implementations§

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impl Clone for WalRecord

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fn clone(&self) -> WalRecord

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for WalRecord

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

Formats the value using the given formatter. Read more

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Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.