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I want to create a common function used for every table, is that possible?

<@!336983535074279444> I tried to create function and triggers like this:

```
CREATE OR REPLACE FUNCTION public.update_updated_at()
RETURNS TRIGGER AS $$
BEGIN
  NEW.updated_at = TIMEZONE('utc' :: TEXT, NOW());
  RETURN NEW;
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;

CREATE TRIGGER trigger_design_files_updated_at
BEFORE UPDATE ON public.design_files
FOR EACH ROW
EXECUTE PROCEDURE public.update_updated_at();
```
It works now! Failed because of forgetting to write `public` I guess. Thanks.