Struct KeyDigestComputer 

pub struct KeyDigestComputer { /* private fields */ }

Cassandra-compatible key digest computer

This struct provides the exact key digest computation algorithm used by Cassandra for partition key hashing in Index.db files.

Implementations

impl KeyDigestComputer

pub fn new() -> Self

Create a new key digest computer

pub fn compute_partition_key_digest( &mut self, partition_key_bytes: &[u8], parsing_context: &ParsingContext, ) -> Result<Vec<u8>>

Compute the partition key digest for Index.db lookup

This method implements the exact Cassandra algorithm:

1. Parse the partition key bytes according to schema comparators
2. Create byte-comparable encoding for each component
3. Combine components into a single byte-comparable key
4. Compute Murmur3 hash with seed 0 (Cassandra default)
5. Return the hash as little-endian bytes

pub fn compute_simple_digest(&self, partition_key: &[u8]) -> Result<Vec<u8>>

Compute a simple hash-based digest (fallback for when schema is unavailable)

This method provides compatibility with the existing implementation when full schema information is not available.

Trait Implementations

impl Default for KeyDigestComputer

fn default() -> Self

Returns the “default value” for a type.