Crate ff_backend_postgres 

EngineBackend implementation backed by Postgres.

RFC-v0.7 Wave 0 — scaffold. This crate lands the PostgresBackend struct + the impl EngineBackend block with every method stubbed to return EngineError::Unavailable. Subsequent waves fill in bodies:

• Wave 1: cross-cutting error/helpers.
• Wave 2: describe / list / resolve (read surface).
• Wave 3: schema migrations (replaces the Wave 0 placeholder).
• Wave 4: LISTEN/NOTIFY wiring + stream reads/tails.
• Wave 5-7: hot-path write methods.
• Wave 8: ff-server wire-up + dual-backend running.

The trait stays object-safe; consumers can hold Arc<dyn EngineBackend>. No ferriskey dep — this crate’s transport is sqlx.

Re-exports

pub use completion::PostgresCompletionStream;

pub use completion::COMPLETION_CHANNEL;

pub use error::map_sqlx_error;

pub use error::PostgresTransportError;

pub use listener::StreamNotifier;

pub use migrate::apply_migrations;

pub use migrate::MigrationError;

pub use scanner_supervisor::PostgresScannerConfig;

pub use scanner_supervisor::PostgresScannerHandle;

pub use version::check_schema_version;

Modules

attempt

Attempt trait-method family — Postgres implementation.

budget

Budget family — Postgres impl.

completion

CompletionBackend implementation for Postgres (Wave 4h / Q1).

dispatch

Post-completion dependency-resolution cascade (Wave 5a).

error

sqlx::Error → EngineError mapping for the Postgres backend.

exec_core

exec_core trait-method family — Postgres impls.

flow

Postgres flow-family EngineBackend implementations (Wave 4c).

flow_staging

Postgres flow-staging inherent methods (Wave 4i).

handle_codec

Postgres-side thin wrapper over ff_core::handle_codec.

listener

Shared LISTEN connection + in-memory stream notifier.

migrate

Schema-migration application.

operator

RFC-020 Wave 9 Spine-A pt.1 — operator-control mutating methods (cancel_execution + revoke_lease).

pool

PgPool construction helper.

reconcilers

Postgres-backend scanner reconcilers (RFC-v0.7 Wave 6).

scanner_supervisor

Postgres scanner supervisor (RFC-017 Wave 8 Stage E3).

scheduler

Admission-pipeline for the Postgres backend (RFC-v0.7 Wave 5b).

signal

Signal delivery + HMAC secret rotation for the Postgres backend.

stream

Stream-family trait methods on the Postgres backend (RFC-015).

suspend

Suspend + resume plumbing for the Postgres backend.

suspend_ops

Suspend / deliver_signal / claim_resumed / observe_signals SQL bodies.

version

Boot-time schema-version check.

Structs

PostgresBackend

PostgresConnection

Postgres-specific connection parameters (RFC-v0.7 Wave 0).

Type Aliases

PgPool

An alias for Pool, specialized for Postgres.