plan-cache: the results is different if decimal column exist some larger value

[ChenPeng2013]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

prepared-plan-cache.enabled =true

use test;
drop table if exists PK_S_MULTI_37;
 CREATE TABLE `PK_S_MULTI_37` (
  `COL1` decimal(55,0) NOT NULL,
  `COL2` decimal(55,0) NOT NULL,
  PRIMARY KEY (`COL1`,`COL2`) /*T![clustered_index] NONCLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
insert into PK_S_MULTI_37 values(-9999999999999999999999999999999999999999999999, 1);

prepare stmt from 'SELECT SUM(COL1+?), col2 FROM PK_S_MULTI_37 GROUP BY col2';
set @a=1;
execute stmt using @a;

SELECT SUM(COL1 + 1), col2 FROM PK_S_MULTI_37 GROUP BY col2;

2. What did you expect to see? (Required)

MySQL [test]> prepare stmt from 'SELECT SUM(COL1+?), col2 FROM PK_S_MULTI_37 GROUP BY col2';
Query OK, 0 rows affected (0.00 sec)

MySQL [test]> set @a=1;
Query OK, 0 rows affected (0.00 sec)

MySQL [test]> execute stmt using @a;
+-------------------------------------------------+------+
| SUM(COL1+?)                                     | col2 |
+-------------------------------------------------+------+
| -9999999999999999999999999999999999999999999998 |    1 |
+-------------------------------------------------+------+
1 row in set (0.00 sec)

MySQL [test]>
MySQL [test]> SELECT SUM(COL1 + 1), col2 FROM PK_S_MULTI_37 GROUP BY col2;
+-------------------------------------------------+------+
| SUM(COL1 + 1)                                   | col2 |
+-------------------------------------------------+------+
| -9999999999999999999999999999999999999999999998 |    1 |
+-------------------------------------------------+------+
1 row in set (0.00 sec)

3. What did you see instead (Required)

MySQL [test]> prepare stmt from 'SELECT SUM(COL1+?), col2 FROM PK_S_MULTI_37 GROUP BY col2';
Query OK, 0 rows affected (0.00 sec)

MySQL [test]> set @a=1;
Query OK, 0 rows affected (0.00 sec)

MySQL [test]> execute stmt using @a;
Empty set (0.00 sec)

MySQL [test]>
MySQL [test]> SELECT SUM(COL1 + 1), col2 FROM PK_S_MULTI_37 GROUP BY col2;
+-------------------------------------------------+------+
| SUM(COL1 + 1)                                   | col2 |
+-------------------------------------------------+------+
| -9999999999999999999999999999999999999999999998 |    1 |
+-------------------------------------------------+------+
1 row in set (0.00 sec)

4. What is your TiDB version? (Required)

Release Version: v5.4.0-alpha-634-g02c4179
Edition: Community
Git Commit Hash: 02c4179dd2fe284f2364b24cbfe794467fe9141b
Git Branch: release-5.4
UTC Build Time: 2022-01-17 01:01:46
GoVersion: go1.17.6
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false

[Reminiscent]

The hashAgg can work correctly. But the streamAgg will get an error.

mysql> prepare stmt from 'SELECT /*+ HASH_AGG() */ SUM(COL1+?), col2 FROM PK_S_MULTI_37 GROUP BY col2';
Query OK, 0 rows affected (0.01 sec)

mysql> set @a=1;
Query OK, 0 rows affected (0.00 sec)

mysql> execute stmt using @a;
Empty set (0.00 sec)

mysql> 
mysql> prepare stmt from 'SELECT /*+ STREAM_AGG() */ SUM(COL1+?), col2 FROM PK_S_MULTI_37 GROUP BY col2';
Query OK, 0 rows affected (0.00 sec)

mysql> set @a=1;
Query OK, 0 rows affected (0.00 sec)

mysql> execute stmt using @a;
ERROR 1265 (01000): Data truncated for column '%s' at row %d