DROP_COLLATION - remove a collation

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

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

To drop the collation named german: DROP COLLATION german;

DROP_COLLATION - remove a 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.

ALTER COLLATION (ALTER_COLLATION(7)), CREATE COLLATION (CREATE_COLLATION(7)) PostgreSQL 17.5 2025 DROPCOLLATION(7)

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