Authorization in Hive is used to verify if a user has permission to perform a certain action, such as creating, reading, and writing data or metadata. Hive provides three authorization modes: legacy mode, storage-based mode, and SQL standard-based mode.

Legacy mode

This is the default authorization mode in Hive, providing column and row-level authorization through HQL statements. However, it is not a completely secure authorization mode and has a couple of limitations. It can be mainly used to prevent good users from accidentally doing bad things rather than preventing malicious users' operations. In order to enable the legacy authorization mode, we need to set the following properties in hive-site.xml:

<property> <name></name> ...

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