text: -- @testpoint: lower函数，union all的使用
  drop table if exists TEST_LOWER_008;
  create table TEST_LOWER_008(COL1 varchar2(20));
  insert into TEST_LOWER_008 values ('aHGGFGFaabn');
  insert into TEST_LOWER_008 values ('aldjfGHJJK');
  insert into TEST_LOWER_008 values ('FGGHFfsjds');
  drop table if exists TEST_LOWER_009;
  create table TEST_LOWER_009(COL1 varchar2(20));
  insert into TEST_LOWER_009 values ('aHGGFGFaabn');
  insert into TEST_LOWER_009 values ('asjfGHJKSL');
  insert into TEST_LOWER_009 values ('xkcjdjHJKKL');
  select lower(COL1) from TEST_LOWER_008 union all select lower(COL1) from TEST_LOWER_009 order by 1;
  drop table if exists TEST_LOWER_008;
  drop table if exists TEST_LOWER_009;