统一的Catalog接口 Unified Catalog API 提供基于内存的和可持久和的Catalog实现 Provide both in- memoryandpersistent catalog implementations 支持与Hive的互操作: Inter opera bility with Hive: 访问Hive元数据 Access to Hive metadata 读写Hive表 Re ad/write Hive ta bles 支持Flink作为Hive的引擎(长期目标) Add Flink as a Hive execution engine (long- term plan)