Struct WalRecordHeader 

pub struct WalRecordHeader {
    pub lsn: u64,
    pub txn_id: u64,
    pub record_type: u8,
    pub prev_lsn: u64,
    pub page_id: u64,
    pub offset: u16,
    pub data_length: u32,
    pub before_length: u16,
    /* private fields */
}

WAL record header (fixed size for efficient parsing)

Fields

lsn: u64

Log Sequence Number

txn_id: u64

Transaction ID

record_type: u8

Record type

prev_lsn: u64

Previous LSN for this transaction (for UNDO chain)

page_id: u64

Page ID affected (0 for non-page operations)

offset: u16

Offset within page

data_length: u32

Total data length (before + after images)

before_length: u16

Before image length

Implementations

impl WalRecordHeader

pub const SIZE: usize = 48

pub fn serialize(&self) -> [u8; 48]

pub fn deserialize(buf: &[u8]) -> Option<Self>

Trait Implementations

impl Clone for WalRecordHeader

fn clone(&self) -> WalRecordHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WalRecordHeader

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

Formats the value using the given formatter.