[GitHub] [shardingsphere] peilinqian commented on issue #22375: If the select column doesn't only contain group by column,and the group by column is primary key，returns error.

[GitBox <gi...@apache.org>]

peilinqian commented on issue #22375:
URL: https://github.com/apache/shardingsphere/issues/22375#issuecomment-1325870448

   **If the column of group by is not primary key ,opengauss is also returned erro**
   
   ```
   drop table if exists t_order; 
   drop table if exists t_merchant; 
   create table t_order (order_id int primary key, user_id int not null, status varchar(50) not null, merchant_id int not null, remark varchar(50), creation_date date);
   create table t_merchant (merchant_id int, country_id int not null, merchant_name varchar(50) not null, business_code varchar(50) not null, telephone varchar(50) not null, creation_date date not null);
   
   insert into t_order values(1000, 10, 'init', 1, 'test', '2017-07-08');
   insert into t_order values(1001, 10, 'init', 2, 'test', '2017-07-08');
   insert into t_order values(2000, 20, 'init', 3, 'test', '2017-08-08');
   insert into t_order values(2001, 20, 'init', 4, 'test', '2017-08-08');
   insert into t_order values(3100, 11, 'init', 5, 'test', '2017-08-08');
   insert into t_order values(3000, 10, 'init', 1, 'test', '2017-07-08');
   insert into t_order values(3001, 10, 'init', 2, 'test', '2017-07-08');
   insert into t_order values(4000, 20, 'init', 3, 'test', '2017-08-08');
   insert into t_order values(4001, 20, 'init', 4, 'test', '2017-08-08');
   insert into t_order values(4100, 11, 'init', 5, 'test', '2017-08-08');
   insert into t_merchant values(1, 86, 'tencent', '86000001', '86100000001', '2017-08-08');
   insert into t_merchant values(2, 86, 'haier', '86000002', '86100000002', '2017-08-08');
   insert into t_merchant values(3, 86, 'huawei', '86000003', '86100000003', '2017-08-08');
   insert into t_merchant values(4, 86, 'alibaba', '86000004', '86100000004', '2017-08-08');
   insert into t_merchant values(5, 86, 'lenovo', '86000005', '86100000005', '2017-08-08');
   
   select min(o.order_id), min(o.merchant_id), m.merchant_name from t_order o inner join t_merchant m on o.merchant_id = m.merchant_id group by m.merchant_id;
   ```
   ```
   tpccdb=# select min(o.order_id), min(o.merchant_id), m.merchant_name from t_order o inner join t_merchant m on o.merchant_id = m.merchant_id group by m.merchant_id;
   ERROR:  column "m.merchant_name" must appear in the GROUP BY clause or be used in an aggregate function
   LINE 1: select min(o.order_id), min(o.merchant_id), m.merchant_name ...
   ```
   


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