Struct DatabaseHeader 

pub struct DatabaseHeader {
    pub version: u32,
    pub page_size: u32,
    pub page_count: u32,
    pub freelist_head: u32,
    pub schema_version: u32,
    pub checkpoint_lsn: u64,
    pub checkpoint_in_progress: bool,
    pub checkpoint_target_lsn: u64,
    pub required_capabilities: u64,
    pub physical: PhysicalFileHeader,
}

Database file header information persisted in page 0 after the page header.

Fields

version: u32

page_size: u32

page_count: u32

freelist_head: u32

schema_version: u32

checkpoint_lsn: u64

checkpoint_in_progress: bool

checkpoint_target_lsn: u64

required_capabilities: u64

Monotonic set of byte-level features required to decode this file.

physical: PhysicalFileHeader

Implementations

impl DatabaseHeader

pub fn requires_disk_residency(&self) -> bool

Whether the file requires a writer that participates in the bounded disk-residency protocol.

Versions before the capability bitmap encoded that requirement in the monotonically increasing version number. Newer files declare it as an independent capability so unrelated codecs can evolve the format.

Trait Implementations

impl Clone for DatabaseHeader

fn clone(&self) -> DatabaseHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DatabaseHeader

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

Formats the value using the given formatter.

impl Default for DatabaseHeader

fn default() -> DatabaseHeader

Returns the “default value” for a type.

impl Eq for DatabaseHeader

impl PartialEq for DatabaseHeader

fn eq(&self, other: &DatabaseHeader) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DatabaseHeader