Enum CassandraVersion 

pub enum CassandraVersion {
    Legacy,
    V5_0Alpha,
    V5_0Beta,
    V5_0Release,
    V5_0NewBig,
    V5_0Bti,
    V5_0DataFormat,
    V5_0FormatC,
    V5_0FormatD,
    V5_0FormatE,
    V5_0FormatF,
    V5_0FormatG,
    V5_0StaticColumns,
    V5_0Uncompressed,
    V5_0ComplexTypes,
    V5_0TypedCollections,
    V5_0WideRows,
    V5_0NewBigFormat,
}

Cassandra version enum mapping magic numbers to versions

Variants

Legacy

Legacy ‘oa’ format (backward compatibility)

V5_0Alpha

Cassandra 5.0 Alpha

V5_0Beta

Cassandra 5.0 Beta

V5_0Release

Cassandra 5.0 Release

V5_0NewBig

Cassandra 5.0 ‘nb’ (new big) format

V5_0Bti

Cassandra 5.0 BTI (Big Trie-Indexed) format

V5_0DataFormat

Cassandra 5.0 Data.db format (from real test data)

V5_0FormatC

Cassandra 5.0 Format C (from test data)

V5_0FormatD

Cassandra 5.0 Format D (from test data)

V5_0FormatE

Cassandra 5.0 Format E (composite keys)

V5_0FormatF

Cassandra 5.0 Format F (TTL support)

V5_0FormatG

Cassandra 5.0 Format G (counters)

V5_0StaticColumns

Cassandra 5.0 Static Columns format

Test data artifact found in test_basic/static_columns_table-*/nb-1-big-Data.db. Magic number: 0xC051_5C00

V5_0Uncompressed

Cassandra 5.0 Uncompressed format

Test data artifact found in test_basic/uncompressed_table-*/nb-1-big-Data.db. Magic number: 0x0010_045E

V5_0ComplexTypes

Cassandra 5.0 Complex Types format (frozen collections, UDTs, nested collections)

Test data artifact found in tables with complex type definitions:

• test_collections/frozen_collections_table-*/nb-1-big-Data.db

Magic number: 0x8236_5C00

V5_0TypedCollections

Cassandra 5.0 Typed Collections format

Test data artifact found in test_collections/typed_collections_table-*/nb-1-big-Data.db.

Magic number: 0x0F3C_0000

V5_0WideRows

Cassandra 5.0 Wide Rows format (clustering columns, large partitions)

Test data artifact found in test_wide_rows/chat_messages-*/nb-1-big-Data.db.

Magic number: 0xF07C_5C00

V5_0NewBigFormat

Cassandra 5.0 NewBig Format with byte-comparable keys (CEP-25)

This format uses byte-comparable encoding for partition and clustering keys, which differs from VInt-based encoding. Keys use component separators (0x40) and terminators (0x38), with type-specific encodings (sign bit flipping for integers, escape sequences for text).

Magic number: 0xD464_5400

Implementations

impl CassandraVersion

pub fn magic_number(&self) -> u32

Get the magic number for this version

pub fn from_magic_number(magic: u32) -> Option<CassandraVersion>

Parse magic number to version with proper format detection

pub fn version_string(&self) -> &'static str

Get human-readable version string

pub fn data_format(&self) -> DataFormat

Get the data format characteristics for this version

This method classifies Cassandra versions by their actual data encoding format:

• LegacyOA: Legacy ‘oa’ uncompressed format with older serialization
• V5CompressedLegacy: Cassandra 5.0 ‘nb’ (new big) compressed format that uses legacy serialization header encoding inside compressed blocks (u16 lengths, not VInt)
• V5UncompressedOA: Cassandra 5.0 true ‘oa’ format with VInt-encoded partition keys

Critical Distinction

The V5_0DataFormat and related formats (C-G) use ‘nb’ naming and compression but encode partition keys and rows using the legacy serialization format inside decompressed blocks:

• Partition key component lengths: u16 big-endian (NOT VInt)
• Row encoding: Legacy serialization header format
• Should NOT use RowCellStateMachine (which expects VInt encoding)

Only V5_0NewBig and V5_0Bti use the true “oa” format with VInt encoding.

pub fn is_nb_format(&self) -> bool

Check if this version uses the NB (New Big) chunked format.

NB format files are headerless, use the nb-{gen}-big- naming convention, and read data via CompressionInfo.db chunk offsets (when compressed) or raw sequential reads (when uncompressed).

Excludes V5_0Uncompressed (which also uses V5CompressedLegacy row format but has a different read path) and V5_0Bti (which uses OA format).

Trait Implementations

impl Clone for CassandraVersion

fn clone(&self) -> CassandraVersion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CassandraVersion

impl Debug for CassandraVersion

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CassandraVersion

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for CassandraVersion

impl PartialEq for CassandraVersion

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for CassandraVersion

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CassandraVersion