Controls firing of replication-related triggers and rules for the current session. Possible values are
origin (the default),
local. Setting this parameter results in discarding any previously cached query plans. Only superusers and users with the appropriate
SET privilege can change this setting.
The intended use of this setting is that logical replication systems set it to
replica when they are applying replicated changes. The effect of that will be that triggers and rules (that have not been altered from their default configuration) will not fire on the replica. See the clauses
ENABLE TRIGGER and
ENABLE RULE for more information.
PostgreSQL treats the settings
local the same internally. Third-party replication systems may use these two values for their internal purposes, for example using
local to designate a session whose changes should not be replicated.
Since foreign keys are implemented as triggers, setting this parameter to
replica also disables all foreign key checks, which can leave data in an inconsistent state if improperly used.