Function fieldEqual

src/jrd/optimizer/Optimizer.cpp:313–334

	}

	bool fieldEqual(const ValueExprNode* node1, const ValueExprNode* node2)
	{
		if (!node1 || !node2)
			return false;

		if (node1->getType() != node2->getType())
			return false;

		if (node1 == node2)
			return true;

		const auto fieldNode1 = nodeAs<FieldNode>(node1);
		const auto fieldNode2 = nodeAs<FieldNode>(node2);

		if (fieldNode1 && fieldNode2)
		{
			return fieldNode1->fieldStream == fieldNode2->fieldStream &&
				fieldNode1->fieldId == fieldNode2->fieldId;
		}

		return false;
	}

	bool fieldEqual(const BoolExprNode* node1, const BoolExprNode* node2)
	{