DROP FOREIGN DATA 
WRAPPER(7) PostgreSQL 9.2.7 Documentation DROP FOREIGN DATA WRAPPER(7) NAME
DROP_FOREIGN_DATA_WRAPPER - remove a foreign-data wrapper SYNOPSIS
DROP FOREIGN DATA WRAPPER [ IF EXISTS ] name [ CASCADE | RESTRICT ] DESCRIPTION
DROP FOREIGN DATA WRAPPER removes an existing foreign-data wrapper. To execute this command, the current user must be the owner of the foreign-data wrapper. PARAMETERS
IF EXISTS Do not throw an error if the foreign-data wrapper does not exist. A notice is issued in this case. name The name of an existing foreign-data wrapper. CASCADE Automatically drop objects that depend on the foreign-data wrapper (such as servers). RESTRICT Refuse to drop the foreign-data wrappers if any objects depend on it. This is the default. EXAMPLES
Drop the foreign-data wrapper dbi: DROP FOREIGN DATA WRAPPER dbi; COMPATIBILITY
DROP FOREIGN DATA WRAPPER conforms to ISO/IEC 9075-9 (SQL/MED). The IF EXISTS clause is a PostgreSQL extension. SEE ALSO
CREATE FOREIGN DATA WRAPPER (CREATE_FOREIGN_DATA_WRAPPER(7)), ALTER FOREIGN DATA WRAPPER (ALTER_FOREIGN_DATA_WRAPPER(7)) PostgreSQL 9.2.7 2014-02-17 DROP FOREIGN DATA WRAPPER(7)