Version: 9.3 / 9.4 / 9.5 / 9.6 / 10 / 11 / 12 / 13 / 14 / 15 / 16

PostgreSQL 9.6.0 Documentation
Prev	Up		Next

DROP COLLATION

Name

DROP COLLATION -- remove a collation

DROP COLLATION [ IF EXISTS ] name [ CASCADE | RESTRICT ]

DROP COLLATION removes a previously defined collation. To be able to drop a collation, you must own the collation.

IF EXISTS: Do not throw an error if the collation does not exist. A notice is issued in this case.
name: The name of the collation. The collation name can be schema-qualified.
CASCADE: Automatically drop objects that depend on the collation, and in turn all objects that depend on those objects (see Section 5.13).
RESTRICT: Refuse to drop the collation if any objects depend on it. This is the default.

To drop the collation named german:

DROP COLLATION german;

The DROP COLLATION command conforms to the SQL standard, apart from the IF EXISTS option, which is a PostgreSQL extension.