UPDATE triggers where WHEN clause has not been specified (the trigger could executed too often)

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Goal Find UPDATE triggers where WHEN clause is not specified. These triggers could be executed too often because unneeded executions are not prevented.
Notes The query takes into account that one cannot specify WHEN clause in case of INSTEAD OF triggers.
Type Problem detection (Each row in the result could represent a flaw in the design)
Reliability Low (Many false-positive results)
License MIT License
Fixing Suggestion Do not let the system to do extra work. Ensure that trigger procedures are executed only if there is a real need of that. Specify WHEN clause with a Boolean expression that has to be satisfied to execute the trigger.
Data Source INFORMATION_SCHEMA only
SQL Query 
SELECT trigger_schema, trigger_table, trigger_name,  event_manipulation, action_orientation, action_timing, action_condition, columns
FROM
(SELECT 
T. trigger_schema, 
T.event_object_table AS trigger_table,
T.trigger_name,
T.action_condition,
T.event_manipulation,
T.action_orientation,
T.action_timing,
array_agg(event_object_column::text) AS columns
FROM 
  (SELECT * FROM information_schema.triggers WHERE event_manipulation='UPDATE') AS T LEFT JOIN  information_schema.triggered_update_columns AS TUC
ON T.trigger_schema=TUC.trigger_schema AND T.trigger_name=TUC.trigger_name AND
 T.event_object_table=TUC.event_object_table
GROUP BY T. trigger_schema,  T.event_object_table, T.trigger_name, T.event_manipulation,
T.action_orientation,
T.action_timing, T.action_condition) AS f
WHERE (action_timing<>'INSTEAD OF' AND action_condition IS NULL) 
ORDER BY trigger_schema, trigger_table, trigger_name;
Categories

This query is classified under the following categories:

NameDescription
PerformanceQueries of this category provide information about indexes in a database.
Triggers and rulesQueries of this category provide information about triggers and rules in a database.