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Hive :- 创建表、AlterTable 等完成需要一些后端 DML (MetaStore)。哪个班级会做这些？哪个类将从 MetaStore 获取数据库凭据？
You can look into org.apache.hadoop.hive.metastore.HiveMetastoreClient which provides different methods to deal with the metastore in Hive