Logical replication behaves similarly to normal DML operations
in that the data will be updated even if it was changed locally
on the subscriber node. If incoming data violates any constraints
the replication will stop. This is referred to as a conflict. When replicating
operations, missing data will not produce a conflict and such
operations will simply be skipped.
A conflict will produce an error and will stop the replication; it must be resolved manually by the user. Details about the conflict can be found in the subscriber's server log.
The resolution can be done either by changing data on the
subscriber so that it does not conflict with the incoming change
or by skipping the transaction that conflicts with the existing
data. The transaction can be skipped by calling the
corresponding to the subscription name, and a position. The
current position of origins can be seen in the