SQL COMMANDS / TYPES & OPERATORS

DROP COLLATION

remove a collation

Syntax

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

Syntax diagrams

Read left to right. Branches are choices, bypasses are optional, loops repeat. Select an underlined parameter to open its rule.

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 5.15).
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.

Definition snapshot: 2026-09-14T13:14:25.700916+00:00@99e6866c · English manual source