问题
I've been having a lot of issues lately, basically since the last time I upgraded XAMPP for OSX (v1.7.3) and/or my MySQL GUI tools. Using MySQL Workbench (v5.2.44), I can connect to the DB running in XAMPP just fine, but trying to browse any database, under tables/views/etc it only shows "Fetching..." and never shows anything else. I can actually query tables, which is interesting, but I can't actually manage the databases in any meaningful way.
Googling, others reported having luck running mysql_upgrade on the command line, which ran fine but did not fix my issue.
回答1:
The following command worked for me on windows:
C:\Program Files\MySQL\MySQL Server 5.5\bin>mysql_upgrade.exe -u root -p --force
If the root password is not set, you might need to do this before you run the command above:
mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('something');
回答2:
The link above to mysql_upgrade did not solve my problem directly, but it did lead me to examine my mysql error file, which ultimately led me to the solution. I noticed several lines like this in the error file (located at [xampp root]/var/mysql/[dbname].err):
/Applications/XAMPP/xamppfiles/sbin/mysqld: Can't create/write to file
'/var/folders/y2/37h93r_931sdfpcr7vnc83380000gn/T/ibigNFFi' (Errcode: 13)
That led me to this page in the MySQL docs which states that you should explicitly set the temp folder for MySQL. I double-checked my config file ([xampp root]/etc/my.cnf) and saw this, which looked fine:
[mysqld]
tmpdir = /Applications/XAMPP/xamppfiles/temp/
However, looking back at the error log, I also noticed this:
Warning: World-writable config file '/Applications/XAMPP/xamppfiles/etc/my.cnf' is ignored
Duh. The config file was getting ignored, so the configured temp folder was not getting used (I have no clue why the file was world-writeable...). I edited permissions on the my.cnf file which was 777 and simply removed the "Everyone|write" permission (now 775 / -rwxrwxr-x), reloaded everything, and now everything works.
Not a very intuitive symptom for the ultimate fix, so hopefully this helps someone else.
回答3:
If you have MAMP instead of XAMP the solution above won't work for you. Open MAMP then on the top menu go to Tools->Upgrade MySQL databases. Now open Mysql Workbench and it should list all your tables correctly
回答4:
I set Authenticated Users with all privileges to the var/folders/y2/ For me work fine ;)
Before the process I removed authenticated users privileges.
回答5:
If you are using linux distro the run following command:
mysql_upgrade -u root -p
来源：https://stackoverflow.com/questions/13127538/mysql-workbench-fetching-cannot-browse-db