Function
DROP DATABASE deletes a database.
Important Notes
- Only the owner of a database or a system administrator has the permission to run the DROP DATABASE command.
- DROP DATABASE does not take effect for the three preinstalled system databases (gaussdb, TEMPLATE0, and TEMPLATE1) because they are protected. To check databases in the current service, run the \l command of gsql.
- This command cannot be run while the database to be deleted is associated with a user. You can check the current database connections in the v$session view.
- DROP DATABASE cannot be run inside a transaction block.
- If DROP DATABASE fails to be run and is rolled back, run DROP DATABASE IF EXISTS.
- If a "database is being accessed by other users" error is displayed when you run DROP DATABASE, it might be that threads cannot respond to signals in a timely manner during the CLEAN CONNECTION process. As a result, connections are not completely cleared. In this case, you need to run CLEAN CONNECTION again.
- Be cautious when using DROP OBJECT (e.g., DATABASE, USER/ROLE, SCHEMA, TABLE, VIEW) as it may cause data loss, especially with CASCADE deletions. Always back up data before proceeding.
- For more information about development and design specifications, see "GaussDB(DWS) Development and Design Proposal" in the Data Warehouse Service (DWS) Developer Guide.
Syntax
1 | DROP DATABASE [ IF EXISTS ] database_name ; |
Parameters
- IF EXISTS
Sends a notice instead of an error if the specified database does not exist.
- database_name
Specifies the name of the database to be deleted.
Value range: A string indicating an existing database name.
Examples
Delete the database named music.
1 | DROP DATABASE music; |