DROP RULE name ON relation [ CASCADE | RESTRICT ]
DROP RULE drops a rewrite rule.
The name of the rule to drop.
The name (optionally schema-qualified) of the table or view that the rule applies to.
Automatically drop objects that depend on the rule.
Refuse to drop the rule if any objects depend on it. This is the default.
To drop the rewrite rule newrule:
DROP RULE newrule ON mytable;
There is no DROP RULE statement in the SQL standard.