【 使用环境 】测试环境，docker方式安装
【 OB or 其他组件 】
【 使用版本 】Server version: 5.7.25 OceanBase 3.1.4 (r10000092022071511-b4bfa011ceaef428782dcb65ae89190c40b78c2f) (Built Jul 15 2022 11:45:14)
【问题描述】3.1.4中change char to varchar会报错
【复现路径】
obclient [test3]> select * from t1;
±—±-----+
| c1 | c2 |
±—±-----+
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
±—±-----+
4 rows in set (0.001 sec)
obclient [test3]> select * from t2;
±—±-----+
| c1 | c2 |
±—±-----+
| 5 | 5 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
±—±-----+
4 rows in set (0.001 sec)
obclient [test3]> DELETE FROM t1, t2 USING t1, t2 WHERE t1.c1 = t2.c1;
ERROR 1235 (0A000): uncertain plan violating external consistency not supported