text: -- @testpoint: openGauss关键字Exception(非保留)同时作为表名和列名带引号,并使用该列结合limit排序,Exception列的值按字母大小排序且只显示前2条数据
  
  drop table if exists "explain";
  create table "explain"(
  	c_id int, c_int int, c_integer integer, c_bool int, c_boolean int, c_bigint integer,
  	c_real real, c_double real,
  	c_decimal decimal(38), c_number number(38), c_numeric numeric(38),
  	c_char char(50) default null, c_varchar varchar(20), c_varchar2 varchar2(4000),
  	c_date date, c_datetime date, c_timestamp timestamp,
  	"explain" varchar(100) default 'explain'
  )
  PARTITION BY RANGE (c_integer)
  (
  	partition P_20180121 values less than (0),
  	partition P_20190122 values less than (50000),
  	partition P_20200123 values less than (100000),
  	partition P_max values less than (maxvalue)
  );
  delete from "explain";
  insert into "explain"(c_id,"explain") values(1,'hello');
  insert into "explain"(c_id,"explain") values(2,'china');
  insert into "explain"(c_id,"explain") values(3,'gauss');
  select "explain" from "explain" where "explain"!='hello' order by "explain" limit 2 ;
  
  drop table "explain";
  
  