Из курсора в таблицу

DROP TABLE proc_162_results;
CREATE TABLE proc_162_results (
  topic_id int,
  isin_name VARCHAR,
  topic_name VARCHAR, 
 trading_country VARCHAR,
  resident_country VARCHAR,
  count_of_articles int,
  PRIMARY KEY (topic_id)
);
 
CREATE OR REPLACE FUNCTION proc_162() RETURNS BOOLEAN AS
$$
DECLARE
   n          int := 0;
   crs_isins CURSOR FOR 
    SELECT
        t.id AS topic_id,
        COALESCE(string_agg(i.name, ';'), 'no data')  AS isin_name,
        t.name AS topic_name,
        COALESCE(MIN(c1.short_name), 'no data') AS trading_country,
        COALESCE(MIN(c2.short_name), 'no data') AS resident_country,
        COUNT(a.id) AS count_of_articles
    FROM articles a
    left join topics t ON t.id = ANY(a.topic_ids)
    left join isins i ON i.topic_id = t.id
    left join topics_trading_countries ttc ON ttc.topic_id = t.id
    left join trading_countries tc ON tc.id = ttc.trading_country_id
    left join countries c1 ON tc.country_id = c1.id
    left join resident_countries rc ON rc.topic_id = t.id
    left join countries c2 ON rc.country_id = c2.id
    WHERE   a.topic_ids IS NOT NULL
    AND t.id IS NOT NULL 
        AND a.proc_phase LIKE 'to_freeze' 
        AND a.duplicate = 'false' 
        AND a.category IN (1,2) 
        AND a.publish_date = '2017-07-31'
--and a.publish_date between '2017-07-24' and '2017-07-31'
--and a.publish_date between '2017-07-01' and '2017-07-31'
   GROUP BY t.id;
  
  _topic_id int;
  _isin_name VARCHAR;
  _topic_name VARCHAR;
  _trading_country VARCHAR;
  _resident_country VARCHAR;
  _count_of_articles int;
      
  BEGIN
  OPEN crs_isins;
  LOOP
    FETCH crs_isins INTO _topic_id, _isin_name, _topic_name, _trading_country, _resident_country, _count_of_articles;
      INSERT INTO proc_162_results (topic_id, isin_name, topic_name, trading_country, resident_country, count_of_articles) 
      VALUES (_topic_id, _isin_name, _topic_name, _trading_country, _resident_country, _count_of_articles)
     -- where topic_id is not null;
    n := n+1;
    BEGIN
    EXCEPTION WHEN OTHERS THEN
        RAISE NOTICE 'Error';
        END;
   END LOOP;
  CLOSE crs_isins;
  RETURN TRUE;
 
END
$$ LANGUAGE plpgsql;

IF _topic_id IS NULL THEN
..... -- здесь _topic_id присвоить какое-то значение
END IF;

IF _topic_id IS NOT NULL AND _isin_name IS NOT NULL AND ... THEN
INSERT ....
END IF;