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FilHeader

idb::innodb::page

Struct FilHeader 

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pub struct FilHeader {
    pub checksum: u32,
    pub page_number: u32,
    pub prev_page: u32,
    pub next_page: u32,
    pub lsn: u64,
    pub page_type: PageType,
    pub flush_lsn: u64,
    pub space_id: u32,
}
Expand description

Parsed FIL header (38 bytes, present at the start of every InnoDB page).

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§checksum: u32

Checksum (or space id in older formats). Bytes 0-3.

§page_number: u32

Page number within the tablespace. Bytes 4-7.

§prev_page: u32

Previous page in the doubly-linked list. Bytes 8-11. FIL_NULL (0xFFFFFFFF) if not used.

§next_page: u32

Next page in the doubly-linked list. Bytes 12-15. FIL_NULL (0xFFFFFFFF) if not used.

§lsn: u64

LSN of newest modification to this page. Bytes 16-23.

§page_type: PageType

Page type. Bytes 24-25.

§flush_lsn: u64

Flush LSN (only meaningful for page 0 of system tablespace). Bytes 26-33.

§space_id: u32

Space ID this page belongs to. Bytes 34-37.

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impl FilHeader

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pub fn parse(data: &[u8]) -> Option<Self>

Parse a FIL header from a byte slice.

The slice must be at least SIZE_FIL_HEAD (38) bytes.

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pub fn has_prev(&self) -> bool

Returns true if prev_page is FIL_NULL (not used).

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pub fn has_next(&self) -> bool

Returns true if next_page is FIL_NULL (not used).

Trait Implementations§

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impl Clone for FilHeader

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fn clone(&self) -> FilHeader

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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

Formats the value using the given formatter. Read more
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impl Serialize for FilHeader

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

Serialize this value into the given Serde serializer. Read more

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