What is DB properties in database in Hive?

How can I see database properties in hive?

DESCRIBE|DESC DATABASE shows the name of the database, its comment (if one has been set), and its root location on the filesystem. The uses of SCHEMA and DATABASE are interchangeable – they mean the same thing. DESCRIBE SCHEMA is added in Hive 0.15 (HIVE-8803). EXTENDED also shows the database properties.

How would you describe a database in hive?

The general format of using the DESCRIBE DATABASE command is as follows: DESCRIBE DATABASE [EXTENDED] db_name; DESCRIBE SCHEMA [EXTENDED] db_name; Where: DATABASE|SCHEMA : These are the same thing.

Where is DB path in hive?

Where do Hive Tables stores in HDFS? Hive stores tables files by default at /user/hive/warehouse location on HDFS file system. You need to create these directories on HDFS before you use Hive. On this location, you can find the directories for all databases you create and subdirectories with the table name you use.

How do I find table properties in hive?

This command will list all the properties for the Sales table: Show tblproperties Sales; The preceding command will list only the property for numFiles in the Sales table: Show partitions Sales ('numFiles');

How do I rename a DB in Hive?

We can also alter the database as below.

  1. Alter in Database Properties. Example: ALTER ( DATABASE | SCHEMA ) database name SET database properties ( property name = property value, … );
  2. Alter the Owner. Example: ALTER (DATABASE| SCHEMA) database name SET OWNER [USER|ROLE ] user or role ;
  3. Alter the HDFS Location.

What are table properties in Hive?

The TBLPROPERTIES clause allows you to tag the table definition with your own metadata key/value pairs. Some predefined table properties also exist, such as last_modified_user and last_modified_time which are automatically added and managed by Hive.

How does hive manage databases?

To list out the databases in Hive warehouse, enter the command 'show databases'. The database creates in a default location of the Hive warehouse. In Cloudera, Hive database store in a /user/hive/warehouse. Copy the input data to HDFS from local by using the copy From Local command.

What is Derby database in hive?

Apache Derby is an open source relational database and an Apache DB subproject implemented entirely in Java. Key advantages include a small footprint, and an embedded JDBC driver based on Java. Derby is easy to install, use, and deploy as well as supporting the familiar server/client mode.

How do I create a DB in Hive?

Go to Hive shell by giving the command sudo hive and enter the command 'create database<data base name>' to create the new database in the Hive. To list out the databases in Hive warehouse, enter the command 'show databases'. The database creates in a default location of the Hive warehouse.

Is hive a DB?

Hive is a database present in Hadoop ecosystem performs DDL and DML operations, and it provides flexible query language such as HQL for better querying and processing of data.

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