hive通過元數據查詢表數據量

orc存儲的表默認保存文件數和文件大小，textfile存儲的保存數據條數

 select * from TBLS where TBL_NAME='tablename';

 select * from TABLE_PARAMS where TBL_ID='111';

 select * from PARTITIONS where tbl_id=111;

select * from PARTITION_PARAMS where part_id=222;