Method lookupRecord

src/jrd/replication/Applier.cpp:1096–1198

}

bool Applier::lookupRecord(thread_db* tdbb,
						   jrd_rel* relation, Record* record,
						   index_desc& idx, const MetaName* idxName)
{
	RecordBitmap::reset(m_bitmap);

	// Special case: RDB$DATABASE has no keys but it's guaranteed to have only one record
	if (relation->rel_id == rel_database)
	{
		RBM_SET(tdbb->getDefaultPool(), &m_bitmap, 0);
		return false;
	}

	bool haveIdx = false;
	if (idxName && idxName->hasData())
	{
		SLONG foundRelId;
		IndexStatus idxStatus;
		SLONG idx_id = MET_lookup_index_name(tdbb, *idxName, &foundRelId, &idxStatus);

		fb_assert(idxStatus == MET_object_active);
		fb_assert(foundRelId == relation->rel_id);

		haveIdx = (idx_id >= 0) && (idxStatus == MET_object_active) && (foundRelId == relation->rel_id) &&
			BTR_lookup(tdbb, relation, idx_id, &idx, relation->getPages(tdbb));
	}

	if (!haveIdx)
		haveIdx = lookupKey(tdbb, relation, idx);

	if (haveIdx)
	{
		IndexKey key(tdbb, relation, &idx);
		if (const auto result = key.compose(record))
		{
			IndexErrorContext context(relation, &idx);
			context.raise(tdbb, result, record);
		}

		IndexRetrieval retrieval(relation, &idx, idx.idx_count, key);
		retrieval.irb_generic = irb_equality | (idx.idx_flags & idx_descending ? irb_descending : 0);

		BTR_evaluate(tdbb, &retrieval, &m_bitmap, NULL);
		return true;
	}

	NoKeyTable* table = NULL;

	for (size_t i = 0; i < FB_NELEM(NO_KEY_TABLES); i++)
	{
		const auto tab = &NO_KEY_TABLES[i];

		if (tab->rel_id == relation->rel_id)
		{
			table = tab;
			break;
		}
	}