Method getAlias

src/dsql/ExprNodes.h:1717–1726

	virtual dsc* execute(thread_db* tdbb, Request* request) const;

	const char* getAlias(bool rdb) const
	{
		if (blrOp == blr_record_version2)
		{
			// ASF: It's on purpose that RDB$ prefix is always used here.
			// Absense of it with DB_KEY seems more a bug than feature.
			return RDB_RECORD_VERSION_NAME;
		}
		return (rdb ? RDB_DB_KEY_NAME : DB_KEY_NAME);
	}

private:
	static ValueExprNode* catenateNodes(thread_db* tdbb, ValueExprNodeStack& stack);