DROP RULE

Function

Deletes a rewriting rule.

Syntax

DROP RULE [ IF EXISTS ] name ON table_name [ CASCADE | RESTRICT ];

Parameter Description

• IF EXISTS

  If the rule does not exist, a notice is thrown.

• name

  Name of an existing rule to be deleted.

• table_name

  Name of the table to which the rule applies.

• CASCADE

  Automatically cascade deletes objects that depend on this rule.

• RESTRICT

  Refuses to delete the rule if any objects depend on it. The default value is used.

Examples

-- Create the def_test table and the def_view_test view for creating rules.
gaussdb=# CREATE TABLE def_test (
c1 int4 DEFAULT 5,
c2 text DEFAULT 'initial_default'
);
gaussdb=# CREATE VIEW def_view_test AS SELECT * FROM def_test;
-- Create the rule def_view_test_ins.
gaussdb=# CREATE RULE def_view_test_ins AS
gaussdb=# ON INSERT TO def_view_test
gaussdb=#DO INSTEAD INSERT INTO def_test SELECT new.*;
-- Delete the rule def_view_test_ins.
gaussdb=# DROP RULE def_view_test_ins ON def_view_test;
-- Delete the def_test table and the def_view_test view.
gaussdb=# DROP VIEW def_view_test;
gaussdb=# DROP TABLE def_test;

Helpful Links

CREATE RULE