text: -- @testpoint: 插入正常值，设定字节长度为1
  -- @modify at: 2020-11-05
  
  
  drop table if exists test_character_04;
  create table test_character_04 (name character(1));
  insert into test_character_04 values ('a');
  select * from test_character_04;
  drop table test_character_04;