WITH Tr AS (SELECT
n.nspname AS trigger_schema,
t.tgname AS trigger_name,
em.text AS event_manipulation,
c.relname AS trigger_table,
np.nspname AS routine_schema,
p.proname AS routine_name,
p.prosrc AS routine_definition,
(SELECT DISTINCT action_condition FROM INFORMATION_SCHEMA.triggers AS it WHERE it.trigger_schema=n.nspname AND it.event_object_table=c.relname AND it.trigger_name=t.tgname) AS action_condition,
CASE t.tgtype::integer & 1
WHEN 1 THEN 'ROW'
ELSE 'STATEMENT'
END AS action_orientation,
CASE t.tgtype::integer & 66
WHEN 2 THEN 'BEFORE'
WHEN 64 THEN 'INSTEAD OF'
ELSE 'AFTER'
END AS action_timing,
EXISTS (SELECT 1 FROM pg_constraint AS c WHERE c.oid=t.tgconstraint AND c.contype='t') AS is_constraint_trigger,
t.tginitdeferred AS is_init_deferred
FROM pg_namespace n,
pg_class c,
pg_trigger t,
pg_proc p,
pg_namespace np,
( VALUES (4,'INSERT'), (8,'DELETE'), (16,'UPDATE'), (32,'TRUNCATE')) em(num, text)
WHERE n.oid = c.relnamespace
AND c.oid = t.tgrelid
AND t.tgfoid=p.oid
AND p.pronamespace=np.oid
AND (t.tgtype::integer & em.num) <> 0
AND NOT t.tgisinternal
AND NOT pg_is_other_temp_schema(n.oid)),
rules AS (SELECT
r.definition
FROM
pg_catalog.pg_rules r,
pg_catalog.pg_namespace n,
pg_catalog.pg_authid u
WHERE
r.schemaname = n.nspname AND
n.nspowner = u.oid AND
(n.nspname = 'public' OR u.rolname <> 'postgres')
AND r.definition!~'DO[[:space:]]+INSTEAD[[:space:]]+NOTHING')
SELECT 'Too few triggers/rules, must be at least three - triggers/rules that do the same thing are counted as one.' As comment,
(SELECT Count(DISTINCT routine_definition) AS cnt FROM Tr)+(SELECT Count(DISTINCT definition) AS cnt FROM rules) AS the_number_of_tasks
WHERE (SELECT Count(DISTINCT routine_definition) AS cnt FROM Tr)+(SELECT Count(DISTINCT definition) AS cnt FROM rules)<3;