Struct simpledb::encoding::KeyMeta

pub struct KeyMeta {
    pub id: u64,
    pub key_type: KeyType,
    pub count: u64,
    pub extra: Option<Vec<u8>>,
}

Meta data struct.

Fields

id: u64

Auto-increment key ID.

key_type: KeyType

Data type.

count: u64

Total items count.

extra: Option<Vec<u8>>

Extra data.

Implementations

impl KeyMeta

pub fn new(id: u64, key_type: KeyType) -> KeyMeta

Create a new KeyMeta instance.

pub fn from_bytes(input: &[u8]) -> KeyMeta

Decode KeyMeta from bytes.

pub fn get_bytes(&self) -> BytesMut

Get bytes.

pub fn decode_list_extra(&self) -> (i64, i64)

Decode extra data for list data type.

pub fn encode_list_extra(&mut self, left: i64, right: i64)

Encode extra data for list data type.

pub fn decode_sorted_list_extra(&self) -> (u64, u32, u32)

Decode extra data for sorted list data type. returns (sequenceu64, left_deleted_countu32, right_deleted_countu32)

pub fn encode_sorted_list_extra(
    &mut self,
    sequence: u64,
    left_deleted_count: u32,
    right_deleted_count: u32
)

Encode extra data for sorted list data type.

pub fn decode_sorted_set_extra(&self) -> (u32, u8)

Decode extra data for sorted set data type. returns (deleted_countu32, score_lenu8)

pub fn encode_sorted_set_extra(&mut self, deleted_count: u32, score_len: u8)

Encode extra data for sorted set data type.

Trait Implementations

impl Clone for KeyMeta

pub fn clone(&self) -> KeyMeta

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for KeyMeta

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

Formats the value using the given formatter.