text: -- @testpoint: 插入数据为拼接字符串测试
  
  DECLARE
    V_C varchar(8000);
  BEGIN
    drop table if exists test_varchar_08;
    create table test_varchar_08 (name varchar(800));
    FOR I IN 1 .. 798 LOOP
      V_C := V_C || 'q';
    END LOOP;
    insert into test_varchar_08 values (V_C);
  END;
  /
  insert into test_varchar_08 select name||'ww' from test_varchar_08;
  select * from test_varchar_08;
  drop table if exists test_varchar_08;