update should not be forbidden in some case even if view is contained

[XuHuaiyu]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?

tidb> create table t(a int);
Query OK, 0 rows affected (0.01 sec)

tidb> drop table t1;
Query OK, 0 rows affected (0.02 sec)

tidb> create table t1(a int);
Query OK, 0 rows affected (0.01 sec)

tidb> create view v as select * from t1;
Query OK, 0 rows affected (0.01 sec)

tidb>
tidb> update t,v set t.a=1 where t.a=v.a;
ERROR 1105 (HY000): update view v is not supported now.

2. What did you expect to see?

No error is returned because not filde of the view v is changed.

[XuHuaiyu]

release-3.0 and release-3.1 are be fixed individually.

master branch can not be fixed using the same way because of inline projection.
I'll fix it asap

[XuHuaiyu]

Fixed already

[ti-srebot]

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