DROP RULE -- Removes an existing rule from the database
DROP RULE name
DROP RULE drops a rule from the specified Postgres rule system. Postgres will immediately cease enforcing it and will purge its definition from the system catalogs.
The DROP RULE statement is a Postgres language extension.
Refer to CREATE RULE for information on how to create rules.
Once a rule is dropped, access to historical information the rule has written may disappear.
To drop the rewrite rule newrule:
DROP RULE newrule;
There is no DROP RULE in SQL92.