Enum PartitionStrategy 

pub enum PartitionStrategy {
    CollectionHomed,
    KeyPartitioned {
        key: KeySpec,
    },
}

How a collection’s rows are distributed across vShards.

This is the authoritative per-collection partition metadata. Future routing, Calvin, and resharding layers read this field instead of inferring distribution from engine type.

Variants

CollectionHomed

All rows live on one owning vShard derived from (db_id, collection).

Every base collection is collection-homed today: Document (schemaless and strict), Columnar (plain, timeseries, spatial), and Key-Value all route to a single vShard that owns the collection. Graph edge-key partitioning and Array tile partitioning are operation-level concerns handled separately and are NOT reflected here at create time.

KeyPartitioned

Rows routed by hashing a key field. Reserved for future key-partitioned collections; not populated at create time in this release.

Fields

key: KeySpec

Implementations

impl PartitionStrategy

pub fn default_for_collection_type(ct: &CollectionType) -> Self

Derive the create-time default strategy from a CollectionType.

Every base engine is collection-homed today:

• Document (schemaless and strict): single-vShard B-tree ownership.
• Columnar (plain, timeseries, spatial): single-vShard segment ownership; timeseries append partitioning is a write-path concern, not a metadata-level partition strategy.
• KeyValue: single-vShard hash-index ownership; per-key routing is internal to the engine, not exposed at the collection layer.

Graph edge-key and Array tile partitioning are operation-level and are handled separately — they are NOT set here at collection create time.

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

Stable lowercase tag for catalog and SHOW output.

Trait Implementations

impl Clone for PartitionStrategy

fn clone(&self) -> PartitionStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PartitionStrategy

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

Formats the value using the given formatter.

impl Default for PartitionStrategy

fn default() -> PartitionStrategy

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PartitionStrategy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for PartitionStrategy

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for PartitionStrategy

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl PartialEq for PartitionStrategy

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for PartitionStrategy

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 PartitionStrategy

impl ToMessagePack for PartitionStrategy

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.