Revoke Hive

Hive is a data warehousing infrastructure built on top of Hadoop that provides a high-level interface for querying and analyzing structured data. It allows users to write SQL-like queries that are translated into MapReduce jobs to process large datasets. However, there might be scenarios where we need to revoke certain privileges or permissions granted to users in Hive.

The Need for Revoking Hive Privileges

In a typical Hive environment, administrators grant specific privileges to users to control their access to tables, databases, and functions. These privileges include the ability to create, alter, and drop databases or tables, as well as the ability to select, insert, or delete data from them. However, there might be situations where these privileges need to be revoked.

For example, if a user has been granted the privilege to drop a table, but it is later decided that this privilege should be revoked to prevent accidental deletions, the administrator needs to perform the necessary steps to revoke the privilege.

Revoking Hive Privileges using SQL

Hive provides a set of SQL-like commands to manage user privileges. To revoke privileges from a user, we can use the REVOKE command followed by the specific privileges to revoke and the target object.

For example, to revoke the DROP privilege on a table named my_table from a user named my_user, we can use the following command:

REVOKE DROP ON TABLE my_table FROM my_user;

Similarly, we can revoke other privileges such as SELECT, INSERT, ALTER, etc., using the REVOKE command.

Revoking Hive Privileges using Hive CLI

Alternatively, we can also revoke privileges using the Hive Command Line Interface (CLI). The CLI provides an interactive shell that allows users to execute Hive queries and commands.

To revoke privileges using the Hive CLI, we can follow these steps:

  1. Start the Hive CLI by running the following command in the terminal:
hive
  1. Connect to the Hive metastore by specifying the necessary connection details:
CONNECT jdbc:hive2://localhost:10000;
  1. Revoke the desired privileges using the REVOKE command:
REVOKE DROP ON TABLE my_table FROM my_user;
  1. Exit the Hive CLI by running the following command:
QUIT;

Revoking Hive Privileges using Hive Web Interface

Hive also provides a web-based interface called Hive Web Interface (HWI) that allows users to interact with Hive using a web browser.

To revoke privileges using the HWI, we can follow these steps:

  1. Start the HWI by running the following command in the terminal:
hwi

  1. Access the HWI interface by opening a web browser and navigating to http://localhost:9999/hwi.

  2. Select the desired Hive database and navigate to the table or function from which the privilege needs to be revoked.

  3. Click on the "Revoke Privilege" button and select the appropriate privilege to revoke.

  4. Confirm the revocation by clicking on the "Revoke" button.

Conclusion

In conclusion, revoking Hive privileges is an essential task in managing user access and security in Hive. Hive provides multiple methods to revoke privileges, including using SQL commands, the Hive CLI, and the Hive Web Interface. By revoking specific privileges, administrators can control user permissions and prevent unauthorized actions on tables, databases, and functions.

References:

  • Hive documentation: [

Code Snippets:

| 代码示例 1 |
| ---------- |
| ```sql    |
| REVOKE DROP ON TABLE my_table FROM my_user; |
| ```        |

| 代码示例 2 |
| ---------- |
| ```shell  |
| hive       |
| ```        |

| 代码示例 3 |
| ---------- |
| ```shell  |
| CONNECT jdbc:hive2://localhost:10000; |
| ```        |

| 代码示例 4 |
| ---------- |
| ```shell  |
| REVOKE DROP ON TABLE my_table FROM my_user; |
| ```        |

| 代码示例 5 |
| ---------- |
| ```shell  |
| QUIT;      |
| ```        |

| 代码示例 6 |
| ---------- |
| ```shell  |
| hwi        |
| ```        |