Struct BackendCapability 

pub struct BackendCapability {

    pub supports_sql_ddl: bool,
    pub supports_transactions: bool,
    pub supports_xa: bool,
    pub supports_two_phase_commit: bool,
    pub supports_rls: bool,
    pub supports_vector_search: bool,
    pub supports_streaming: bool,
    pub supports_ttl: bool,
    pub is_object_store: bool,
    pub is_migration_ledger_capable: bool,
    pub supports_idempotency: bool,
    pub supports_schema_migration: bool,
    pub supports_hybrid_search: bool,
    pub supports_resource_lifecycle: bool,
    pub max_payload_bytes: u64,
    pub consistency_model: String,
}

Feature flags for a backend, used by the APPLYING phase to determine which provisioning operations are applicable.

Fields

supports_sql_ddl: bool

Supports SQL DDL (CREATE TABLE, ALTER TABLE, etc.).

supports_transactions: bool

Supports ACID transactions.

supports_xa: bool

Supports XA-style distributed transaction coordination.

supports_two_phase_commit: bool

Supports two-phase commit / prepared transaction semantics.

supports_rls: bool

Supports row-level security policies (PostgreSQL-specific).

supports_vector_search: bool

Supports vector similarity search (ANN).

supports_streaming: bool

Supports server-sent event streaming.

supports_ttl: bool

Supports native TTL / expiry on records.

is_object_store: bool

Is an object / blob store (bucket + key semantics).

is_migration_ledger_capable: bool

Can host the migration ledger tables (schema_migrations, etc.). Only Postgres is true here — the ledger always lives in the primary DB.

supports_idempotency: bool

Backend guarantees idempotent writes (e.g. supports ON CONFLICT or equivalent upsert semantics with client-supplied idempotency keys).

supports_schema_migration: bool

Backend can apply schema migrations (DDL) driven by the migration apply engine — i.e. the migration apply engine is permitted to execute DDL on it.

supports_hybrid_search: bool

Backend supports hybrid (dense + sparse / keyword + vector) search.

supports_resource_lifecycle: bool

Backend supports lifecycle management via EnsureResource / DropResource / ListResources admin RPCs.

max_payload_bytes: u64

Maximum payload size in bytes the backend can accept per write operation. 0 means unlimited / unknown.

consistency_model: String

Consistency model advertised by the backend. Values: “strong”, “eventual”, “causal”, “read-your-writes”.

Trait Implementations

impl Clone for BackendCapability

fn clone(&self) -> BackendCapability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendCapability

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

Formats the value using the given formatter.

impl Default for BackendCapability

fn default() -> BackendCapability

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for BackendCapability

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for BackendCapability

impl PartialEq for BackendCapability

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for BackendCapability

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 BackendCapability