mysql 5.5升级5.6报错：ERROR 1193 (HY000) at line 84: Unknown system variable 'have_csv'

首先登陆数据库没有问题呀，但是有报错，

文本显示：

ERROR 1193 (HY000) at line 84: Unknown system variable 'have_csv'
ERROR 1064 (42000) at line 86: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NULL' at line 1
ERROR 1243 (HY000) at line 87: Unknown prepared statement handler (stmt) given to EXECUTE
ERROR 1243 (HY000) at line 88: Unknown prepared statement handler (stmt) given to DEALLOCATE PREPARE
ERROR 1193 (HY000) at line 92: Unknown system variable 'have_csv'
ERROR 1064 (42000) at line 94: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NULL' at line 1
ERROR 1243 (HY000) at line 95: Unknown prepared statement handler (stmt) given to EXECUTE
ERROR 1243 (HY000) at line 96: Unknown prepared statement handler (stmt) given to DEALLOCATE PREPARE
大致问题：一个未知的变量 在查看,没有明白

查看master.err 错误日志

2018-11-16 19:07:21 86997 [ERROR] Column count of performance_schema.events_waits_current is wrong. Expected 19, found 16. The table is probably corrupted
2018-11-16 19:07:21 86997 [ERROR] Column count of performance_schema.events_waits_history is wrong. Expected 19, found 16. The table is probably corrupted
2018-11-16 19:07:21 86997 [ERROR] Column count of performance_schema.events_waits_history_long is wrong. Expected 19, found 16. The table is probably corrupted
在查看使用mysql --version 输出为

mysql  Ver 14.14 Distrib 5.5.11, for Linux (x86_64) using  EditLine wrapper

在数据库里面查看 mysql version()

+------------+
| version()  |
+------------+
| 5.6.42-log |
+------------+
感觉有点奇怪呀，为什么出现这样的现象，输出不一致

首先查看 .bash_profile 查看没有 奇怪了 

使用 which mysql 

/application/mysql/bin/mysql

在一看 这个目录下对mysql 做了个软连接 指向的是5.5 的MySQL包下面对bin,突然明白了，为什么出现这个问题 

直接在.bash_profile 中添加变量  

source .bash_profile  

使用命令 mysql --version 

mysql  Ver 14.14 Distrib 5.6.42, for linux-glibc2.12 (x86_64) using  EditLine wrapper

这下对了 ，在使用

root@master ~]# mysql_upgrade -uroot -pzgs 
Warning: Using a password on the command line interface can be insecure.
Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock' 
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock' 
Warning: Using a password on the command line interface can be insecure.
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.host                                         OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.servers                                      OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
Running 'mysql_fix_privilege_tables'...
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock' 
Warning: Using a password on the command line interface can be insecure.
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock' 
Warning: Using a password on the command line interface can be insecure.
test.ii                                            OK
test.level                                         OK
test.mm                                            OK
test.nn                                            OK
test.pp                                            OK
test.qq                                            OK
test.sc                                            OK
test.test                                          OK
test.uu                                            OK
test.yy                                            OK
test.zz                                            OK
OK
升级成功 。

这下明白了 

在说一个小坑 ，在后来查看mysql 的path写在了 /etc/profile 

导致我第一时间查看.bash_profile 没有查看到问题的原因

同时百度了一下 它们俩的执行顺序

/etc/profile ->/etc/enviroment -->HOME/.profile−−>HOME/.profile−−>HOME/.env

所以再写path 的时候 还是下载用户的环境变量吧

心里苦呀 想了差不多两天！