DROP INDEX — remove an index
DROP INDEX [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]
DROP INDEX drops an existing index from the database
system. To execute this command you must be the owner of
the index.
IF EXISTSDo not throw an error if the index does not exist. A notice is issued in this case.
nameThe name (optionally schema-qualified) of an index to remove.
CASCADEAutomatically drop objects that depend on the index.
RESTRICTRefuse to drop the index if any objects depend on it. This is the default.