DROP SERVER — remove a foreign server descriptor
DROP SERVER [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
DROP SERVER removes an existing foreign server descriptor. To execute this command, the current user must be the owner of the server.
IF EXISTSDo not throw an error if the server does not exist. A notice is issued in this case.
nameThe name of an existing server.
CASCADEAutomatically drop objects that depend on the server (such as user mappings), and in turn all objects that depend on those objects (see Section 5.13).
RESTRICTRefuse to drop the server if any objects depend on it. This is the default.
Drop a server foo if it exists:
DROP SERVER IF EXISTS foo;
DROP SERVER conforms to ISO/IEC 9075-9 (SQL/MED). The IF EXISTS clause is a PostgreSQL extension.
Read the upstream documentation. For corrections, first check the current version.