text: -- @testpoint: opengauss关键字cursor_name(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 cursor_name;
  create function cursor_name(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /
  drop function if exists cursor_name;
  --关键字带双引号-成功
  drop function if exists "cursor_name";
  create function "cursor_name"(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /
  drop function if exists "cursor_name";
  --关键字带单引号-合理报错
  drop function if exists 'cursor_name';
  create function 'cursor_name'(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 `cursor_name`;
  create function `cursor_name`(i integer)
  returns integer
  as $$
  begin
      return i+1;
  end;
  $$ language plpgsql;
  /