text: -- collate2.test
  -- 
  -- execsql {
  --       SELECT b FROM collate2t1 
  --         WHERE b IN (SELECT a FROM collate2t1 WHERE a IN ('aa', 'bb'));
  -- }
  SELECT b FROM collate2t1 
  WHERE b IN (SELECT a FROM collate2t1 WHERE a IN ('aa', 'bb'));