CHAPTER 9

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Using Apache Hive

Apache Hive is data warehouse framework for storing, managing and querying large data sets. The Hive query language HiveQL is a SQL-like language. Hive stores data in HDFS by default, and a Hive table may be used to define structure on the data. Hive supports two kinds of tables: managed tables and external tables. A managed table is managed by the Hive framework while an external table is not. When a managed table is deleted, the metadata and the table data are deleted. When a Hive external table is deleted, only the metadata is deleted, and the table data is not since the table data is not managed by the Hive framework. ...

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