Function
DROP SCHEMA deletes a schema in a database.
Precautions
- Only the owner of a schema or a user granted with the DROP permission for the schema or a system administrator has the permission to execute the Drop SCHEMA statement.
- 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 SCHEMA [ IF EXISTS ] schema_name [, ...] [ CASCADE | RESTRICT ]; |
Parameter Description
- IF EXISTS
Sends a notice instead of an error if the specified schema does not exist.
- schema_name
Specifies the name of a schema.
Value range: An existing schema name.
- CASCADE | RESTRICT
- CASCADE: automatically deletes all objects that are contained in the schema to be deleted.
- RESTRICT: refuses to delete the schema that contains any objects. This is the default.
Do not delete the schemas with the beginning of pg_temp or pg_toast_temp. They are internal system schemas, and deleting them may cause unexpected errors.
A user cannot delete the schema in use. To delete the schema in use, switch to another schema.
Example
Delete the ds_new schema:
DROP SCHEMA ds_new;