Goal Show user-defined triggers if there are more than 9 different trigger routine bodies, i.e., different triggers on different tables that do the same thing count as one trigger.
Type General (Overview of some aspect of the database.)
License MIT License
Data Source INFORMATION_SCHEMA+system catalog
SQL Query
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))  
SELECT Tr.trigger_schema, trigger_table, action_timing, event_manipulation, action_orientation, action_condition, string_agg(event_object_column::text, ',
' ORDER BY event_object_column) AS update_columns, is_constraint_trigger, is_init_deferred, Tr.trigger_name, routine_name, regexp_replace(routine_definition,'[\r\n]','
','g') AS routine_definition FROM Tr LEFT JOIN information_schema.triggered_update_columns AS TUC ON Tr.trigger_schema=TUC.trigger_schema AND Tr.trigger_name=TUC.trigger_name AND Tr.trigger_table=TUC.event_object_table WHERE (SELECT Count(DISTINCT routine_definition) AS cnt FROM Tr)>=9 GROUP BY Tr.trigger_schema, Tr.trigger_table, action_timing, event_manipulation, action_orientation, action_condition, is_constraint_trigger, is_init_deferred, Tr.trigger_name, routine_name, regexp_replace(routine_definition,'[\r\n]','
','g') ORDER BY Tr.trigger_schema, Tr.trigger_table, event_manipulation, action_timing, action_orientation, Tr.trigger_name;
Categories

This query is classified under the following categories:

NameDescription
AssessmentQueries of this category could be used specifically in the learning environment to assess as to whether student projects have filled certain criteria.
Triggers and rulesQueries of this category provide information about triggers and rules in a database.