tidb4.0执行大型sql报没有tmp目录错处理（ERROR 1105 (HY000): open /tmp/1000_tidb/MC4wLjAuMDo0MDAwLzAuMC4wLjA6MTAwODA）

环境：tidb4.0

错误详情：

mysql> select count(*) total,zrqdm from wpt_jbdjxx_hcy where xt_zxbz='0' and ywlsh in (select ywlsh from wpt_jbdjxx where xt_confirm = '1') group by zrqdm;
ERROR 1105 (HY000): open /tmp/1000_tidb/MC4wLjAuMDo0MDAwLzAuMC4wLjA6MTAwODA=/tmp-storage/chunk.ListInDisk028952359: no such file or directory

原因：sql查询需要比较大的空间，自动使用临时目录存储数据，默认配置的路径没权限。

处理方法：修改临时目录

1、查看tidb的临时目录

mysql>  SHOW CONFIG WHERE type = 'tidb' AND name like '%tmp-storage-path%';
+------+--------------------+------------------+-----------------------------------------------------------------+
| Type | Instance           | Name             | Value                                                           |
+------+--------------------+------------------+-----------------------------------------------------------------+
| tidb | 172.21.210.33:4000 | tmp-storage-path | /tmp/1000_tidb/MC4wLjAuMDo0MDAwLzAuMC4wLjA6MTAwODA=/tmp-storage |
| tidb | 172.21.210.32:4000 | tmp-storage-path | /tmp/1000_tidb/MC4wLjAuMDo0MDAwLzAuMC4wLjA6MTAwODA=/tmp-storage |
| tidb | 172.21.210.39:4000 | tmp-storage-path | /tmp/1000_tidb/MC4wLjAuMDo0MDAwLzAuMC4wLjA6MTAwODA=/tmp-storage |
+------+--------------------+------------------+-----------------------------------------------------------------+

2、修改临时目录

tiup cluster edit-config tidb
server_configs:
  tidb:
    binlog.enable: false
    binlog.ignore-error: false
    log.slow-threshold: 2000
    mem-quota-query: 573741824
    tmp-storage-path: /data1/tidb-deploy/tmp

新建临时目录（该目录必须tidb有权限）
su - tidb
mkdir -p /data1/tidb-deploy/tmp

3、依次重启tidb服务节点　　

tiup cluster stop tidb -N 172.21.210.32:4000   #停单个节点 （33、39）
tiup cluster start tidb -N 172.21.210.32:4000   #启动单个节点

4、进行验证

--再次查看tmp目录并执行语句，可以了
mysql>  SHOW CONFIG WHERE type = 'tidb' AND name like '%tmp-storage-path%';
+------+--------------------+------------------+------------------------+
| Type | Instance           | Name             | Value                  |
+------+--------------------+------------------+------------------------+
| tidb | 172.21.210.32:4000 | tmp-storage-path | /data1/tidb-deploy/tmp |
| tidb | 172.21.210.33:4000 | tmp-storage-path | /data1/tidb-deploy/tmp |
| tidb | 172.21.210.39:4000 | tmp-storage-path | /data1/tidb-deploy/tmp |
+------+--------------------+------------------+------------------------+
3 rows in set (0.02 sec)