Module logical 

Logical replication helpers shared by replica apply and point-in-time restore.

Structs

LogicalChangeApplier

Shared logical change applier so replica replay and PITR converge on the same semantics. Stateful (PLAN.md Phase 11.5): tracks the last applied LSN + payload hash so duplicates / older LSNs / gaps / divergences are detected explicitly.

ReplicaApplyMetrics

PLAN.md Phase 11.5 — counters the replica apply loop bumps when an invariant breaks. Surfaced via reddb_replica_apply_errors_total. Decode errors aren’t strictly apply errors but they share the same observability lane so dashboards alert on “replica is ingesting trash from primary regardless of cause”.

Enums

ApplyErrorKind

ApplyMode

ApplyOutcome

Outcome of a single apply call. Applied advances the chain; Idempotent and Skipped are no-ops (we already saw an equal-or-newer LSN). Gap and Divergence (returned via LogicalApplyError) are fail-closed — callers (replica fetcher, restore loop) should mark the instance unhealthy and stop applying.

LogicalApplyError