In the edb-async-replic replication system, every replicated table is required to have at least one UNIQUE constraint whose columns are declared NOT NULL. Any primary key satisfies this requirement.
As a last resort, this command can be used to add such an attribute to a table that does not have a primary key. Since this modification can have unwanted side effects, it is strongly recommended that users add a unique and not null attribute by other means.
Node ID of the set origin where the table will be added as a set member. (See SET ADD TABLE.)
The full name of the table consisting of the schema and table name as the SQL expression quote_ident(nspname) || '.' || quote_ident(relname) would return it.