Enum BackendFeature 

pub enum BackendFeature {
    InsertReturning,
    UpsertOnConflict,
    ArrayColumns,
    HStoreColumns,
    JsonbColumns,
    FullTextSearch,
    CidrInet,
    UuidNative,
    Boolean,
}

Backend feature flags surfaced to umbral.

New variants land alongside new backend behaviour. Each variant represents one capability that umbral reasons about explicitly; the system check or the migration engine asks via supports(feature) rather than hard-coding if backend.name() == "postgres".

Variants

InsertReturning

INSERT ... RETURNING column[, ...] on inserts. Postgres + SQLite (3.35+); MySQL doesn’t have it natively.

UpsertOnConflict

INSERT ... ON CONFLICT (col) DO UPDATE upserts. Postgres + SQLite.

ArrayColumns

Array column types (text[], int[], etc.). Postgres only.

HStoreColumns

HStoreField analogue: key => value text maps. Postgres only.

JsonbColumns

Native jsonb column with index / operator support. Postgres only; SQLite supports JSON-as-TEXT but without the operator surface, so this flag is more honest as “real jsonb” than “any JSON.”

FullTextSearch

Native full-text search (tsvector + to_tsquery). Postgres only.

CidrInet

CIDR / INET / MACADDR network address column types. Postgres only.

UuidNative

Native UUID column type. Postgres only; SQLite encodes UUIDs as TEXT instead.

Boolean

Native BOOLEAN column type. Postgres + SQLite (since 3.23); MySQL historically encodes as TINYINT.

Trait Implementations

impl Clone for BackendFeature

fn clone(&self) -> BackendFeature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BackendFeature

impl Debug for BackendFeature

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

Formats the value using the given formatter.

impl Eq for BackendFeature

impl Hash for BackendFeature

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BackendFeature

fn eq(&self, other: &BackendFeature) -> 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 StructuralPartialEq for BackendFeature