runtime error: index out of range [1] with length 1

[ChenPeng2013]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

using tikv store

use test;
source [test.txt](https://github.com/pingcap/tidb/files/6913910/test.txt)

select * from IDT_HP24100 where col1 is null and col2 = "ogbRo";

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

release-4.0 & release-5.1 & master

mysql> select * from IDT_HP24100 where col1 is null and col2 = "ogbRo";
Empty set (0.08 sec)

3. What did you see instead (Required)

release-5.0

mysql> select * from IDT_HP24100 where col1 is null and col2 = "ogbRo";
ERROR 1105 (HY000): runtime error: index out of range [1] with length 1

4. What is your TiDB version? (Required)

Release Version: v5.0.4
Edition: Community
Git Commit Hash: 48c4b91d5d7c8f4aca68fffcc9f320c9a6e4cce2
Git Branch: heads/refs/tags/v5.0.4
UTC Build Time: 2021-07-26 13:36:17
GoVersion: go1.13
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false

[time-and-fate]

Confirmed that this bug was fixed by #23849 on the master branch.
Cherry-picked to release-5.0 in #26963.

[ChenPeng2013]

duplicated of #23802

[ti-srebot]

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