DROP TABLESPACE
Removes a tablespace.
Synopsis
DROP TABLESPACE [IF EXISTS] <tablespace_name>Description
DROP TABLESPACE removes a tablespace from the system.
A tablespace can only be dropped by its owner or a superuser.
The tablespace must be empty of all database objects before it can be dropped.
It is possible that objects in other databases may still reside in the tablespace even if no objects in the current database are using the tablespace.
Also, if the tablespace is listed in the temp_tablespaces setting of any active session, DROP TABLESPACE might fail due to temporary files residing in the tablespace.
Parameters
| Parameter | Description |
|---|---|
IF EXISTS |
Do not throw an error if the tablespace does not exist. A notice is issued in this case |
tablespace_name |
The name of the tablespace to remove |
Notes
Run DROP TABLESPACE during a period of low activity to avoid issues due to concurrent creation of tables and temporary objects.
When a tablespace is dropped, there is a small window in which a table could be created in the tablespace that is currently being dropped.
If this occurs, Greengage DB returns a warning.
This is an example of the DROP TABLESPACE warning:
DROP TABLESPACE mytest;Result:
WARNING: tablespace with oid "16415" is not empty (seg1 192.168.8.145:25433 pid=29023) WARNING: tablespace with oid "16415" is not empty (seg0 192.168.8.145:25432 pid=29022) WARNING: tablespace with oid "16415" is not empty DROP TABLESPACE
The table data in the tablespace directory is not deleted. You can use the ALTER TABLE command to change the tablespace defined for the table and move the data to an existing tablespace.
Examples
Remove the mystuff tablespace:
DROP TABLESPACE mystuff;Compatibility
DROP TABLESPACE is a Greengage DB extension.