Function EXE_execute_triggers

src/jrd/exe.cpp:1101–1293

void EXE_execute_triggers(thread_db* tdbb,
						  TrigVector** triggers,
						  record_param* old_rpb,
						  record_param* new_rpb,
						  TriggerAction trigger_action,
						  StmtNode::WhichTrigger which_trig,
						  int ddl_action)
{
/**************************************
 *
 *	e x e c u t e _ t r i g g e r s
 *
 **************************************
 *
 * Functional description
 *	Execute group of triggers.  Return pointer to failing trigger
 *	if any blow up.
 *
 **************************************/
	if (!*triggers || (*triggers)->isEmpty())
		return;

	SET_TDBB(tdbb);

	Request* const request = tdbb->getRequest();
	jrd_tra* const transaction = request ? request->req_transaction : tdbb->getTransaction();

	RefPtr<TrigVector> vector(*triggers);
	Record* const old_rec = old_rpb ? old_rpb->rpb_record : NULL;
	Record* const new_rec = new_rpb ? new_rpb->rpb_record : NULL;

	AutoPtr<Record> null_rec;

	const bool is_db_trigger = (!old_rec && !new_rec);

	if (!is_db_trigger && (!old_rec || !new_rec))
	{
		record_param* rpb = old_rpb ? old_rpb : new_rpb;
		fb_assert(rpb && rpb->rpb_relation);
		// copy the record
		MemoryPool& pool = *tdbb->getDefaultPool();
		null_rec = FB_NEW_POOL(pool) Record(pool, MET_current(tdbb, rpb->rpb_relation));
		// initialize all fields to missing
		null_rec->nullify();
	}

	TimeStamp timestamp;

	if (request)
		timestamp = request->getGmtTimeStamp();
	else
		TimeZoneUtil::validateGmtTimeStamp(timestamp);

	Request* trigger = NULL;

	try
	{
		for (TrigVector::iterator ptr = vector->begin(); ptr != vector->end(); ++ptr)