Function ExecARUpdateTriggers

src/backend/commands/trigger.c:2926–2967

}

void
ExecARUpdateTriggers(EState *estate, ResultRelInfo *relinfo,
					 ItemPointer tupleid,
					 HeapTuple fdw_trigtuple,
					 TupleTableSlot *newslot,
					 List *recheckIndexes,
					 TransitionCaptureState *transition_capture)
{
	TriggerDesc *trigdesc = relinfo->ri_TrigDesc;

	if ((trigdesc && trigdesc->trig_update_after_row) ||
		(transition_capture &&
		 (transition_capture->tcs_update_old_table ||
		  transition_capture->tcs_update_new_table)))
	{
		/*
		 * Note: if the UPDATE is converted into a DELETE+INSERT as part of
		 * update-partition-key operation, then this function is also called
		 * separately for DELETE and INSERT to capture transition table rows.
		 * In such case, either old tuple or new tuple can be NULL.
		 */
		TupleTableSlot *oldslot = ExecGetTriggerOldSlot(estate, relinfo);

		if (fdw_trigtuple == NULL && ItemPointerIsValid(tupleid))
			GetTupleForTrigger(estate,
							   NULL,
							   relinfo,
							   tupleid,
							   LockTupleExclusive,
							   oldslot,
							   NULL);
		else if (fdw_trigtuple != NULL)
			ExecForceStoreHeapTuple(fdw_trigtuple, oldslot, false);
		else
			ExecClearTuple(oldslot);

		AfterTriggerSaveEvent(estate, relinfo, TRIGGER_EVENT_UPDATE,
							  true, oldslot, newslot, recheckIndexes,
							  ExecGetAllUpdatedCols(relinfo, estate),
							  transition_capture);
	}
}

bool
ExecIRUpdateTriggers(EState *estate, ResultRelInfo *relinfo,