text: -- vacuum.test
  -- 
  -- execsql {
  --     BEGIN;
  --     CREATE TABLE t6 AS SELECT * FROM t1;
  --     CREATE TABLE t7 AS SELECT * FROM t1;
  --     COMMIT;
  -- }
  BEGIN;
  CREATE TABLE t6 AS SELECT * FROM t1;
  CREATE TABLE t7 AS SELECT * FROM t1;
  COMMIT;