Disabled rules

Goal	Identify disabled rules. These should be enabled or dropped, otherwise these are dead code.
Notes	Rules are specific to PostgreSQL and thus it is not possible to get information about these from the INFORMATION_SCHEMA views.
Type	Problem detection (Each row in the result could represent a flaw in the design)
Reliability	High (Few or no false-positive results)
License	MIT License
Fixing Suggestion	Enable the rule or drop it.
Data Source	system catalog only
SQL Query	WITH disabled_rules AS (SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, CASE WHEN ev_type='1' THEN 'SELECT' WHEN ev_type='2' THEN 'UPDATE' WHEN ev_type='3' THEN 'INSERT' ELSE 'DELETE' END AS event, pg_get_ruledef(r.oid) AS definition FROM pg_rewrite r JOIN pg_class c ON c.oid = r.ev_class JOIN pg_namespace n ON n.oid = c.relnamespace JOIN pg_authid u ON n.nspowner = u.oid WHERE ev_enabled='D' AND (n.nspname = 'public' OR u.rolname <> 'postgres')) SELECT schemaname, tablename, rulename, event, definition FROM disabled_rules ORDER BY schemaname, tablename, rulename;

SQL statements that help generate fixes for the identified problem.

SQL Query to Generate Fix Description

SQL Query to Generate Fix	Description
`WITH disabled_rules AS (SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename FROM pg_rewrite r JOIN pg_class c ON c.oid = r.ev_class LEFT JOIN pg_namespace n ON n.oid = c.relnamespace WHERE ev_enabled='D') SELECT format('ALTER TABLE %1$I.%2$I ENABLE RULE %3$I;', schemaname, tablename, rulename) AS statements FROM disabled_rules ORDER BY schemaname, tablename, rulename;`	Enable the rule.
`WITH disabled_rules AS (SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename FROM pg_rewrite r JOIN pg_class c ON c.oid = r.ev_class LEFT JOIN pg_namespace n ON n.oid = c.relnamespace WHERE ev_enabled='D') SELECT format('DROP RULE %1$I ON %2$I.%3$I RESTRICT;', rulename, schemaname, tablename) AS statements FROM disabled_rules ORDER BY schemaname, tablename, rulename;`	Drop the rule.

WITH disabled_rules AS (SELECT n.nspname AS schemaname,
    c.relname AS tablename,
    r.rulename
   FROM pg_rewrite r
     JOIN pg_class c ON c.oid = r.ev_class
     LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
  WHERE ev_enabled='D')
  SELECT format('ALTER TABLE %1$I.%2$I ENABLE RULE %3$I;', schemaname, tablename, rulename) AS statements
  FROM disabled_rules
ORDER BY schemaname, tablename, rulename;

Enable the rule.

WITH disabled_rules AS (SELECT n.nspname AS schemaname,
    c.relname AS tablename,
    r.rulename
   FROM pg_rewrite r
     JOIN pg_class c ON c.oid = r.ev_class
     LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
  WHERE ev_enabled='D')
  SELECT format('DROP RULE %1$I ON %2$I.%3$I RESTRICT;', rulename, schemaname, tablename) AS statements
  FROM disabled_rules
ORDER BY schemaname, tablename, rulename;

Drop the rule.

Collections

This query belongs to the following collections:

Name	Description
Find problems automatically	Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not .

Categories

This query is classified under the following categories:

Name	Description
Triggers and rules	Queries of this category provide information about triggers and rules in a database.
Unused implementation elements	Queries of this catergory provide information about the database objects that are not used.