CREATE OR REPLACE FUNCTION define_inline_trigger (_name text, _when text, _schema text, _relname text,  _pl_code text) RETURNS VOID AS $$
BEGIN
  PERFORM 'CREATE OR REPLACE FUNCTION '||_schema||'.'||_name||'_func() RETURNS TRIGGER AS '||quote_literal(_pl_code)||' LANGUAGE plpgsql';
  PERFORM 'CREATE TRIGGER '||_name||'_triggr  '||_when||' ON '||_schema||'.'||_relname||' FOR EACH ROW EXECUTE PROCEDURE '||_schema||'.'||_name||'_func()';
  RETURN;
END$$ LANGUAGE 'plpgsql';

select define_inline_trigger('article_update_count', 'AFTER INSERT', 'blogs', 'blog_comment', $$
BEGIN
  UPDATE blogs.blog_article SET total_count := total_count+ 1  WHERE article_id = NEW.article_id;
  RETURN NEW;
END$$);