rename column fail when doing column type change concurrently

[wjhuang2016]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

create table t(a int, b int);
insert into t values (1, 1);
alter table t change column b b double; /* in session 1 */
alter table t rename column b to c;     /* in session 2 */

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

No error.

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

mater

[yudongusa]

@bb7133 assign to you for now.

[xhebox]

@wjhuang2016 Is there any plan to fix it recently?

[wjhuang2016]

No