DROP INDEX — remove an index
DROP INDEX 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.
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.