Union all with point get for update and table scan for update returns wrong result #32045
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
prepare data
mysql> create table t1(id int primary key, v int);
mysql> insert into t1 values(1, 100);
mysql> begin pessimistic; -- session1
mysql> update t1 set v=v+1 where id=1; -- session2
mysql> select * from t1 where id =1 for update union all select * from t1 for update; --> session1
2. What did you expect to see? (Required)
+----+-----+
| id | v |
+----+-----+
| 1 | 101 |
| 1 | 101 |
+----+-----+
3. What did you see instead (Required)
+----+-----+
| id | v |
+----+-----+
| 1 | 100 |
| 1 | 101 |
+----+-----+
4. What is your TiDB version? (Required)
mater
mysql> select tidb_version();
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| tidb_version() |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v5.5.0-alpha
Edition: Community
Git Commit Hash: 05a4c65937a3d1a7ccd43b4779f4b8c546b7cb43
Git Branch: heads/refs/tags/v5.5.0-alpha
UTC Build Time: 2022-01-21 07:47:23
GoVersion: go1.16.4
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)