insert data into cache table will lead tidb panic

[aytrack]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

create table t01(a int);
alter table t01 cache;
insert into table t01 values (1,2), (3, 4);

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

insert success and tidb not panic

3. What did you see instead (Required)

MySQL root@127.0.0.1:test> alter table t01 cache;
Query OK, 0 rows affected
Time: 0.018s
MySQL root@127.0.0.1:test> insert into t01 values (1, 2), (3, 4), (5, 6), (7, 8);
(1105, 'assignment to entry in nil map')

the tidb log

[2021/12/28 11:05:42.616 +08:00] [ERROR] [conn.go:1030] ["connection running loop panic"] [conn=3] [lastSQL="insert into t01 values (1, 2), (3, 4), (5, 6), (7, 8)"] [err="assignment to entry in nil map"] [stack="goroutine 860 [running]:\ngithub.com/pingcap/tidb/server.(*clientConn).Run.func1()\n\t/Users/aytrack/gitproject/pingcap/tidb/server/conn.go:1028 +0x8f\npanic({0x6344000, 0x6c14310})\n\t/usr/local/go/src/runtime/panic.go:1038 +0x215\ngithub.com/pingcap/tidb/executor.(*ExecStmt).SummaryStmt(0xc01794cb60, 0x1)\n\t/Users/aytrack/gitproject/pingcap/tidb/executor/adapter.go:1226 +0x637\ngithub.com/pingcap/tidb/executor.(*ExecStmt).FinishExecuteStmt(0xc01794cb60, 0xc017a3ba10, {0x0, 0x0}, 0x0)\n\t/Users/aytrack/gitproject/pingcap/tidb/executor/adapter.go:926 +0x25f\ngithub.com/pingcap/tidb/session.runStmt({0x6c9aa50, 0xc017a3ba10}, 0xc0102a0e00, {0x6cabff8, 0xc01794cb60})\n\t/Users/aytrack/gitproject/pingcap/tidb/session/session.go:1841 +0x785\ngithub.com/pingcap/tidb/session.(*session).ExecuteStmt(0xc0102a0e00, {0x6c9aa50, 0xc017a3ba10}, {0x6cc7340, 0xc01794c8f0})\n\t/Users/aytrack/gitproject/pingcap/tidb/session/session.go:1699 +0xb25\ngithub.com/pingcap/tidb/server.(*TiDBContext).ExecuteStmt(0xc01118b650, {0x6c9aa50, 0xc017a3ba10}, {0x6cc7340, 0xc01794c8f0})\n\t/Users/aytrack/gitproject/pingcap/tidb/server/driver_tidb.go:219 +0x44\ngithub.com/pingcap/tidb/server.(*clientConn).handleStmt(0xc0103f3e00, {0x6c9a9a8, 0xc018a27040}, {0x6cc7340, 0xc01794c8f0}, {0xc0167b2dc0, 0x0, 0x0}, 0x1)\n\t/Users/aytrack/gitproject/pingcap/tidb/server/conn.go:1971 +0x167\ngithub.com/pingcap/tidb/server.(*clientConn).handleQuery(0xc0103f3e00, {0x6c9a9a8, 0xc018a27040}, {0xc0167ee241, 0x35})\n\t/Users/aytrack/gitproject/pingcap/tidb/server/conn.go:1840 +0x770\ngithub.com/pingcap/tidb/server.(*clientConn).dispatch(0xc0103f3e00, {0x6c9aa50, 0xc011f9fbf0}, {0xc0167ee240, 0x36, 0x36})\n\t/Users/aytrack/gitproject/pingcap/tidb/server/conn.go:1335 +0xead\ngithub.com/pingcap/tidb/server.(*clientConn).Run(0xc0103f3e00, {0x6c9aa50, 0xc011f9fbf0})\n\t/Users/aytrack/gitproject/pingcap/tidb/server/conn.go:1090 +0x253\ngithub.com/pingcap/tidb/server.(*Server).onConn(0xc011256000, 0xc0103f3e00)\n\t/Users/aytrack/gitproject/pingcap/tidb/server/server.go:548 +0x986\ncreated by github.com/pingcap/tidb/server.(*Server).startNetworkListener\n\t/Users/aytrack/gitproject/pingcap/tidb/server/server.go:451 +0x5cf\n"]

4. What is your TiDB version? (Required)

MySQL root@127.0.0.1:test> select tidb_version()\G
***************************[ 1. row ]***************************
tidb_version() | Release Version: v5.4.0-alpha-510-gabb658291
Edition: Community
Git Commit Hash: abb65829101d2f19b69b4e5a4dd0471dbed05915
Git Branch: master
UTC Build Time: 2021-12-27 07:20:45
GoVersion: go1.17.2
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false

[tiancaiamao]

Link #25293

[github-actions]

Please check whether the issue should be labeled with 'affects-x.y' or 'fixes-x.y.z', and then remove 'needs-more-info' label.