Goal Identify disabled triggers. These should be enabled or dropped, otherwise these are dead code.
Notes The query finds triggers that are associated with a table as well as event triggers, which react to schema modifications.
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 (opens in new tab)
Fixing Suggestion Enable the disabled trigger or drop it.
Data Source system catalog only
SQL Query 
SELECT 
n.nspname AS trigger_schema,
t.tgname AS trigger_name,
n.nspname AS table_schema,
c.relname AS table_name,
'TRIGGER' AS type
FROM pg_catalog.pg_namespace n,
pg_catalog.pg_class c,
pg_catalog.pg_trigger t
WHERE n.oid = c.relnamespace AND c.oid = t.tgrelid AND t.tgenabled='D' AND t.tgisinternal=FALSE
UNION ALL SELECT NULL AS trigger_schema,
evtname AS trigger_name,
NULL AS table_schema,
NULL AS table_name,
'EVENT TRIGGER' AS type
FROM pg_catalog.pg_event_trigger
WHERE evtenabled='D'
ORDER BY table_Schema, table_name, trigger_name;

SQL statements that help generate fixes for the identified problem.

Fix Action #1
SELECT format('ALTER TABLE %1$I.%2$I ENABLE TRIGGER %3$I;', n.nspname, c.relname, t.tgname) AS statements
FROM pg_catalog.pg_namespace n,
pg_catalog.pg_class c,
pg_catalog.pg_trigger t
WHERE n.oid = c.relnamespace AND c.oid = t.tgrelid AND t.tgenabled='D' AND t.tgisinternal=FALSE
ORDER BY n.nspname, c.relname, t.tgname;

Enable the trigger.

Fix Action #2
SELECT format('DROP TRIGGER %1$I ON %2$I.%3$I RESTRICT;', t.tgname, n.nspname, c.relname) AS statements
FROM pg_catalog.pg_namespace n,
pg_catalog.pg_class c,
pg_catalog.pg_trigger t
WHERE n.oid = c.relnamespace AND c.oid = t.tgrelid AND t.tgenabled='D' AND t.tgisinternal=FALSE
ORDER BY n.nspname, c.relname, t.tgname;

Drop the trigger.

Fix Action #3
SELECT format('ALTER EVENT TRIGGER %1$I ENABLE;', evtname) AS statements
FROM pg_catalog.pg_event_trigger
WHERE evtenabled='D'
ORDER BY evtname;

Enable the event trigger.

Fix Action #4
SELECT format('DROP EVENT TRIGGER %1$I RESTRICT;', evtname) AS statements
FROM pg_catalog.pg_event_trigger
WHERE evtenabled='D'
ORDER BY evtname;

Drop the event trigger.

SQL Query to Generate FixDescription
SELECT format('ALTER TABLE %1$I.%2$I ENABLE TRIGGER %3$I;', n.nspname, c.relname, t.tgname) AS statements
FROM pg_catalog.pg_namespace n,
pg_catalog.pg_class c,
pg_catalog.pg_trigger t
WHERE n.oid = c.relnamespace AND c.oid = t.tgrelid AND t.tgenabled='D' AND t.tgisinternal=FALSE
ORDER BY n.nspname, c.relname, t.tgname;
Enable the trigger.
SELECT format('DROP TRIGGER %1$I ON %2$I.%3$I RESTRICT;', t.tgname, n.nspname, c.relname) AS statements
FROM pg_catalog.pg_namespace n,
pg_catalog.pg_class c,
pg_catalog.pg_trigger t
WHERE n.oid = c.relnamespace AND c.oid = t.tgrelid AND t.tgenabled='D' AND t.tgisinternal=FALSE
ORDER BY n.nspname, c.relname, t.tgname;
Drop the trigger.
SELECT format('ALTER EVENT TRIGGER %1$I ENABLE;', evtname) AS statements
FROM pg_catalog.pg_event_trigger
WHERE evtenabled='D'
ORDER BY evtname;
Enable the event trigger.
SELECT format('DROP EVENT TRIGGER %1$I RESTRICT;', evtname) AS statements
FROM pg_catalog.pg_event_trigger
WHERE evtenabled='D'
ORDER BY evtname;
Drop the event trigger.

Collections

This query belongs to the following collections:

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 .

NameDescription
Find problems automaticallyQueries, 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:

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.

NameDescription
Triggers and rulesQueries of this category provide information about triggers and rules in a database.
Unused implementation elementsQueries of this catergory provide information about the database objects that are not used.