-- Fail upon insertion of a NULL key into into ISOK_QUERIES
INSERT INTO isok_queries (
    iqname, error, type, keep
    -- , first_run, last_run
  , role, search_path, query, comment)
  VALUES(NULL
       , false
       , 'type1'
       , false
       , NULL
       , NULL
       , $$VALUES ('R1', 'Result number 1', NULL)
                , ('R2', 'Result number 2', NULL)
                , ('R3', 'Result number 3', NULL);$$
       , 'No comment'
       );
ERROR:  null value in column "iqname" of relation "isok_queries" violates not-null constraint
DETAIL:  Failing row contains (null, f, type1, f, null, null, null, null, VALUES ('R1', 'Result number 1', NULL)
                , ('R2', ..., No comment).