DROP AGGREGATE SQL - Language Statements DROP AGGREGATE remove a user-defined aggregate function DROP AGGREGATE name ( type ) [ CASCADE | RESTRICT ] DROP AGGREGATE will delete an existing aggregate function. To execute this command the current user must be the owner of the aggregate function. name The name (optionally schema-qualified) of an existing aggregate function. type The argument data type of the aggregate function, or * if the function accepts any data type. CASCADE Automatically drop objects that depend on the aggregate function. RESTRICT Refuse to drop the aggregate function if any objects depend on it. This is the default. DROP AGGREGATE Message returned if the command was successful. ERROR: RemoveAggregate: aggregate 'name' for type type does not exist This message is returned if the specified aggregate function does not exist. To remove the aggregate function myavg for type integer: DROP AGGREGATE myavg(integer); There is no DROP AGGREGATE statement in the SQL standard.