text: -- @testpoint: opengauss关键字validate(非保留)，作为函数名，部分测试点合理报错
  
  --关键字不带引号-成功
  drop function if exists validate;
  create function validate(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /
  drop function if exists validate;
  --关键字带双引号-成功
  drop function if exists "validate";
  create function "validate"(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /
  drop function if exists "validate";
  --关键字带单引号-合理报错
  drop function if exists 'validate';
  create function 'validate'(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /
  --关键字带反引号-合理报错
  drop function if exists `validate`;
  create function `validate`(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /
  