Struct KeyEncoder 

pub struct KeyEncoder;

KeyEncoder generates lexicographically ordered keys for table rows and indexes.

Layouts:

• Row key: 0x01 | table_id (u32 BE) | row_id (u64 BE)
• Index key: 0x02 | index_id (u32 BE) | encoded_value(s) | row_id (u64 BE)
• Sequence: 0x04 | table_id (u32 BE)

Implementations

impl KeyEncoder

pub fn row_key(table_id: u32, row_id: u64) -> Vec<u8>

SQL row key.

pub fn decode_row_key(key: &[u8]) -> Result<(u32, u64)>

Decode SQL row key.

pub fn table_prefix(table_id: u32) -> Vec<u8>

Prefix for all rows of a table.

pub fn index_key( index_id: u32, value: &SqlValue, row_id: u64, ) -> Result<Vec<u8>>

Index key (single value).

pub fn composite_index_key( index_id: u32, values: &[SqlValue], row_id: u64, ) -> Result<Vec<u8>>

Index key (composite).

pub fn index_prefix(index_id: u32) -> Vec<u8>

Prefix for all entries of an index.

pub fn index_value_prefix(index_id: u32, value: &SqlValue) -> Result<Vec<u8>>

Prefix for equality lookups on a specific value within an index.

pub fn composite_index_prefix( index_id: u32, values: &[SqlValue], ) -> Result<Vec<u8>>

Prefix for equality lookups on a composite value within an index.

pub fn sequence_key(table_id: u32) -> Vec<u8>

Sequence key for auto-increment RowID tracking.