Spark SQL Guide

ALTER DATABASE

Description

You can alter metadata associated with a database by setting DBPROPERTIES. The specified property values override any existing value with the same property name. Please note that the usage of SCHEMA and DATABASE are interchangable and one can be used in place of the other. An error message is issued if the database is not found in the system. This command is mostly used to record the metadata for a database and may be used for auditing purposes.

Syntax

ALTER {DATABASE | SCHEMA} database_name SET DBPROPERTIES (propery_name=property_value, ...);

Parameters

database_name
Specifies the name of the database to be altered.

Examples

-- Creates a database named `inventory`.
CREATE DATABASE inventory;

-- Alters the database to set properties `Edited-by` and `Edit-date`.
ALTER DATABASE inventory SET DBPROPERTIES ('Edited-by' = 'John', 'Edit-date' = '01/01/2001');

-- Verify that properties are set.
DESCRIBE DATABASE EXTENDED inventory;

   +-------------------------+--------------------------------------------+
   |database_description_item|database_description_value                  |
   +-------------------------+--------------------------------------------+
   |Database Name            |inventory                                   |
   |Description              |                                            |
   |Location                 |file:/temp/spark-warehouse/inventory.db     |
   |Properties               |((Edit-date,01/01/2001), (Edited-by,John))  |
   +-------------------------+--------------------------------------------+