Enum Feature 

#[non_exhaustive]
pub enum Feature {
    JsonbPathOps,
    Subscriptions,
    Mutations,
    WindowFunctions,
    CommonTableExpressions,
    FullTextSearch,
    AdvisoryLocks,
    StddevVariance,
    Upsert,
    ArrayTypes,
    BackwardPagination,
}

A database feature that may not be supported on all dialects.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

JsonbPathOps

JSONB path expressions (metadata->>'key', @>, ?, etc.)

Subscriptions

GraphQL subscriptions (real-time push over WebSocket/SSE)

Mutations

Mutations (INSERT/UPDATE/DELETE via mutation_response)

WindowFunctions

Window functions (RANK(), ROW_NUMBER(), LAG(), etc.)

CommonTableExpressions

Common Table Expressions (WITH clause)

FullTextSearch

Full-text search (MATCH, @@, CONTAINS)

AdvisoryLocks

Advisory locks (pg_advisory_lock, GET_LOCK)

StddevVariance

Standard deviation / variance aggregates (STDDEV, VARIANCE)

Upsert

Upsert (ON CONFLICT DO UPDATE, INSERT ... ON DUPLICATE KEY UPDATE, MERGE)

ArrayTypes

Array column types (text[], integer[])

BackwardPagination

Backward keyset pagination (requires stable sort with reversed direction)

Trait Implementations

impl Clone for Feature

fn clone(&self) -> Feature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Feature

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

Formats the value using the given formatter.

impl PartialEq for Feature

fn eq(&self, other: &Feature) -> 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 Copy for Feature

impl Eq for Feature

impl StructuralPartialEq for Feature