[GitHub] [doris] LOVEGISER commented on pull request #13437: [Improvement](decimal) print decimal according to the real precision and scale

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

LOVEGISER commented on PR #13437:
URL: https://github.com/apache/doris/pull/13437#issuecomment-1283456743

   i have test，this is great
   
   `
   CREATE TABLE `test` (
     `id` varchar(32) NULL DEFAULT "",
     `user_name` varchar(32) NULL DEFAULT "",
     `member_list` DECIMAL(10,3)
   ) ENGINE=OLAP
   DUPLICATE KEY(`id`)
   COMMENT 'OLAP'
   DISTRIBUTED BY HASH(`id`) BUCKETS 10
   PROPERTIES (
   "replication_allocation" = "tag.location.default: 1",
   "in_memory" = "false",
   "storage_format" = "V2",
   "disable_auto_compaction" = "false"
   );
   
   
   INSERT INTO test VALUES ('2','sim',1.000);
   INSERT INTO test VALUES ('2','sim',1.001);
   INSERT INTO test VALUES ('2','sim',1.002);
   
   mysql> select  * from test;
   +------+-----------+-------------+
   | id   | user_name | member_list |
   +------+-----------+-------------+
   | 2    | sim       |       1.002 |
   | 2    | sim       |       1.001 |
   | 2    | sim       |       1.000 |
   
   
   mysql> select  cast(avg(member_list) as DECIMAL(10,3)) from test;
   +-------------------------------------------+
   | CAST(avg(`member_list`) AS DECIMAL(10,3)) |
   +-------------------------------------------+
   |                                     1.000 |
   +-------------------------------------------+
   1 row in set (0.02 sec)
   
   `


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